100 Jahre Strom in Franken von der Kaiserzeit bis zur Energiewende : Geschichte, Geschichten und Strom. Treuchtlingen 2014 - Hübner, Thomas (2015)

100 x Unterfranken : ein Quizbüchlein zum Kennenlernen der Heimat / Wolfgang Wußmann ; Ronald Rinklef. Bamberg 2013 - Hübner, Thomas (2014)

10-year Characteristics of Moisture Source Regions and Their Potential Effect on Seasonal Isotopic Signatures of delta O-18 in Tropical Trees of Southern Ecuador - Landshuter, Nadja; Mölg, Thomas; Grießinger, Jussi; Bräuning, Achim; Peters, Thorsten (Frontiers in Earth Science, 2020)
Ratios of stable oxygen isotopes in tree rings (delta O-18) are a valuable proxy for reconstructing past climates. Such reconstructions allow us to gain better knowledge of climate dynamics under different (eg warmer) environmental conditions, which also forms the basis for effective risk management. The latter aspect is particularly relevant for our study site on the western flanks of the Andes in Southern Ecuador, since the region is frequently affected by droughts and heavy precipitation events during the rainy season (January to April), leading to enormous social and economic losses. In particular, we focus on precipitation amounts and moisture source regions as they are known to influence the delta O-18 signature of tree rings. Moisture source regions are based on 240 h backward trajectories that were calculated with the trajectory model LAGRANTO for the rainy seasons 2008 to 2017. A moisture source diagnostic was applied to the air parcel pathways. The resulting moisture source regions were analyzed by calculating composites based on precipitation amounts, season, and calendar year. The precipitation amounts were derived from data of a local Automatic Weather Station (AWS). The analysis confirms that our study site receives its moisture both, from the Atlantic and the Pacific Oceans. Heavy precipitation events are linked to higher moisture contributions from the Pacific, and local SST anomalies along the coast of Ecuador are of higher importance than those off the coast toward the central Pacific. Moreover, we identified increasing moisture contributions from the Pacific over the course of the rainy season. This change and also rain amount effects are detectable in preliminary data of delta O-18 variations in tree rings of Bursera graveolens. These signatures can be a starting point for investigating atmospheric and hydroclimatic processes, which trigger delta O-18 variations in tree rings, more extensively in future studies.
CRIS-Team WoS Importer:2021-02-26

111 Orte in Bayreuth und der Fränkischen Schweiz, die man gesehen haben muss / Dietmar Bruckner ; Michaela Moritz. Köln 2013 - Hübner, Thomas (2013)

111 Orte in Mittelfranken, die man gesehen haben muss. Köln 2014 - Hübner, Thomas (2014)

13C NMR spectroscopic characterization of organic material of soils from a neolithic settlement located in upper Bavaria - Bäumler, Rupert; et al. (2nd European Symposium "NMR in Soil Science", 2000)
UnivIS-Import:2015-04-16:Pub.2000.nat.dgeo.IG.zentr.13cnmr

13 Years of Climate Measurements in Ecuador: The DFG Weather Station Network - Peters, Thorsten; Richter, Michael (TMF Newsletter, 2012)

14C AMS Dating of Wooden Cores from Historic Buildings for Archaeological and Dendrochronological Research in High Asia. - Scharf, Andreas; Bräuning, Achim; Kretschmer, Wolfgang; Wegner, B; Darragon, Frederique Martine (Radiocarbon, 2013)
We had the opportunity to collect valuable wooden core samples from historic monasteries, temples, and secular buildings in 4 regions of High Asia, namely Dolpo (Nepal), ancient Nyangpo, Gyalrong/Minyag, and Lhasa and surroundings (all on the Tibetan Plateau, China). Tree species collected for dating include Pinus wallichiana (Dolpo), Juniperus tibetica, Pinus densata, and several species of the genera Picea (spruce), Larix (larch), and Abies (fir) on the Tibetan Plateau, which could not always be determined to the species level due to the parallel occurrence of species of the same genus in these regions. Some of the wood samples were successfully dendro-dated with local tree-ring chronologies, but many could not, indicating a potentially higher age than the existing local chronologies. By accelerator mass spectrometry (AMS) dating and wiggle-matching 199 14C samples from 73 collected timbers, it was possible to date these wood samples with high precision, and important information about the possible time of construction of these important historic buildings was obtained for the first time. Floating chronologies of 14C-dated wood span the periods AD 650 to 900 in Dolpo and 200 BC to AD 420 on the Tibetan Plateau. Besides dating of the wood samples from these historic monuments, 14C AMS dating with wiggle-matching gives the opportunity to extend the range of the currently existing regional tree-ring chronologies for future environmental reconstructions on the Tibetan Plateau and the Himalayas.
Keywords: Dendrochronology; Radiocarbon

16-year WRF simulation for the Southern Alps of New Zealand - Kropac, Elena; Mölg, Thomas; Cullen, Nicolas James (2023)
The climatological dataset was produced using the Weather and Research Forecasting (WRF) model, version 4.2.2, configured with two nested domains at 10 km (D1) and 2 km (D2) horizontal grid spacing. It covers most of the South Island of New Zealand and is centered over Brewster Glacier in the Southern Alps. The model was forced every three hours by ERA5 reanalysis data at its outer lateral boundaries. The dataset spans the period of 1 January 2005 to 31 December 2020, providing daily output in the outer domain (D1) and 3-hourly output in the innermost domain (D2). The data provided here are a selection of daily averages from the inner WRF domain (D2; 2-km grid spacing). They are distributed among three different file types containing 4-dimensional, 3-dimensional and time-invariant output variables, respectively. For the 4-dimensional fields, perturbation and base-state atmospheric pressure (WRF variables P and PB) and geopotential (PH and PHB) were combined to produce full model fields (PRES and GEOPT). Perturbation potential temperature (T) was converted to total potential temperature (THETA). Wind vectors (U,V, and W) were converted to mass points and rotated to earth coordinates.<br

2019-07-20 : ein Tag im 21. Jahrhundert. Berlin 1986 - Hübner, Thomas (1987)

22 schönste Radeltage Main & Tauber : 861 km Radelvergnügen nach Plan: Main-Radweg, liebliches Taubertal der Klassiker & der Sportive sowie Fränkischer Radachter / von Barbi Lasar & Thomas Lasar. Frankfurt 2015 - Hübner, Thomas (2015)

25mal Fränkische Schweiz - Hübner, Thomas (Heinrichs, 2007)
Keywords: Fränkische Schweiz; Reiseführer

25mal Fränkische Schweiz - Hübner, Thomas (Heinrichs, 2011)
Keywords: Fränkische Schweiz; Reiseführer

25mal Fränkische Schweiz : Impressionen einer Landschaft - Hübner, Thomas (2005)
Keywords: Fränkische Schweiz; Reiseführer

501 years of spring precipitation history for the semi-arid Northern Iran derived from tree-ring δ18O data - Foroozan, Zeynab; Grießinger, Jussi; Pourtahmasi, Kambiz; Bräuning, Achim (Atmosphere, 2020)
In semi-arid regions of the world, knowledge about the long-term hydroclimate variability is essential to analyze and evaluate the impact of current climate change on ecosystems. We present the first tree-ring δ18O based hydroclimatic reconstruction for northern semi-arid Iran spanning the period 1515-2015. A highly significant correlation between tree-ring δ18O variations of juniper trees and spring (April-June) precipitation reveals a major influence of spring water availability during the early growing season. The driest period of the past 501 years occurred in the 16th century while the 18th century was the wettest, during which the overall highest frequency of wet year events occurred. A gradual decline in spring precipitation is evident from the beginning of the 19th century, pointing to even drier climate conditions. The analysis of dry/wet events indicates that the frequency of years with relatively dry spring increased over the last three centuries, while the number of wet events decreased. Our findings are in accordance with historical Persian disaster records (e.g., the severe droughts of 1870-1872, 1917-1919; severe flooding of 1867, the 1930s, and 1950). Correlation analyses between the reconstruction and different atmospheric circulation indices revealed no significant influence of large-scale drivers on spring precipitation in northern Iran.
CRIS-Team Scopus Importer:2020-10-02
Keywords: Climate extremes; Climate reconstruction; Juniperus polycarpos; Paleohydroclimatic proxy; Stable isotope dendroclimatology; δ

60 years of glacier elevation and mass changes in the Maipo River Basin, central Andes of Chile - Farías Barahona, David; Ayala, Álvaro; Bravo, Claudio; Vivero, Sebastián; Seehaus, Thorsten; Vijay, Saurabh; Schaefer, Marius; Buglio, Franco; Casassa, Gino; Braun, Matthias (Remote Sensing, 2020)
Glaciers in the central Andes of Chile are fundamental freshwater sources for ecosystems and communities. Overall, glaciers in this region have shown continuous recession and down-wasting, but long-term glacier mass balance studies providing precise estimates of these changes are scarce. Here, we present the first long-term (1955-2013/2015), region-specific glacier elevation and mass change estimates for the Maipo River Basin, from which the densely populated metropolitan region of Chile obtains most of its freshwater supply. We calculated glacier elevation and mass changes using historical topographic maps, Shuttle Radar Topography Mission (SRTM), TerraSAR-X add-on for Digital Elevation Measurements (TanDEM-X), and airborne Light Detection and Ranging (LiDAR) digital elevation models. The results indicated a mean regional glacier mass balance of-0.12 ± 0.06 m w.e. a-1, with a total mass loss of 2.43 ± 0.26 Gt for the Maipo River Basin between 1955-2013. The most negative glacier mass balance was the Olivares sub-basin, with a mean value of-0.29 ± 0.07mw.e. a-1. We observed spatially heterogeneous glacier elevation and mass changes between 1955 and 2000, and more negative values between 2000 and 2013, with an acceleration in ice thinning rates starting in 2010, which coincides with the severe drought. Our results provide key information to improve glaciological and hydrological projections in a region where water resources are under pressure.
CRIS-Team Scopus Importer:2020-06-05
Keywords: Central Andes; Glacier elevation changes; Glacier mass balance; InSAR; LiDAR; Mountain glaciers

800 years of tree-ring δ18O reflect variability of precipitation in southeastern Tibet - Grießinger, Jussi; Bräuning, Achim; Helle, Gerhard; Thomas, Axel; Schleser, Gerhard Hans (TRACE - Tree Rings in Archaeology, Climatology and Ecology, Vol. 7: Proceedings of the DENDROSYMPOSIUM 2008 Scientific Technical Report STR 09/03, GFZ Potsdam, 2009)
UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IG.LGIPDT.800yea

A 338-year tree-ring oxygen isotope record from Thai teak captures the variations in the Asian summer monsoon system - Pumijumnong, Nathsuda; Bräuning, Achim; Sano, Masaki; Nakatsuka, Takeshi; Muangsong, Chotika; Buajan, Supaporn (Scientific Reports, 2020)
A 338-year oxygen isotope record from teak tree-ring cellulose collected from Mae Hong Son province in northwestern Thailand was presented. The tree-ring series preserves the isotopic signal of the regional wet season rainfall and relative humidity. Tree-ring δ18O correlates strongly with regional rainfall from May to October, showing coherent variations over large areas in Southeast Asia. We reconstructed the summer monsoon season (May to October) rainfall based on a linear regression model that explained 35.2% of the actual rainfall variance. Additionally, we found that in the 19th century, there was a remarkable drought during many years that corresponded to regional historic drought events. The signals of the June to September Indian summer monsoon (ISM) for the period between 1948 and 2009 were clearly found. Spatial correlations and spectral analyses revealed a strong impact of the El Niño-Southern Oscillation (ENSO) on tree-ring δ18O. However, ENSO influenced the tree-ring δ18O more strongly in the 1870–1906, 1907–1943, and 1944–1980 periods than in the 1981–2015 period, which corresponded to periods of weaker and stronger ISM intensity.
CRIS-Team Scopus Importer:2020-06-16

A 4000-year debris flow record based on amphibious investigations of fan delta activity in Plansee (Austria, Eastern Alps) - Kiefer, Carolin; Oswald, Patrick; Moernaut, Jasper; Fabbri, Stefano Claudio; Mayr, Christoph; Strasser, Michael; Krautblatter, Michael (Earth Surface Dynamics, 2021)
The frequency of debris flows is hypothesized to have increased in recent decades with enhanced rainstorm activity. Geological evidence to test the relationship between climate and debris flow activity for prehistoric times is scarce due to incomplete sediment records, complex stratigraphy, and insufficient age control, especially in Alpine environments. In lacustrine archives, the link between onshore debris flow processes and the sedimentary record in lakes is poorly investigated. We present an amphibious characterization of alluvial fan deltas and a continuous 4000-year debris flow record from Plansee (Tyrol, Austria), combining light detection and ranging (lidar) data, swath bathymetry, and sediment core analyses. The geomorphic investigation of two fan deltas in different developmental stages revealed an evolutionary pattern of backfilling and new channel formation onshore, together with active subaqueous progradation on a juvenile fan delta, major onshore sediment deposition, and only few, but larger, subaqueous deposits on a mature fan delta. Geomorphic evidence for stacked and braided debris flow lobes, subaquatic landslide deposits, and different types of turbidites in sediment cores facilitated a process-based event identification, i.e. distinguishing between debris-flow-induced or earthquake-induced turbidites throughout the 4000-year sedimentary record. We directly correlate subaqueous lobe-shaped deposits with high backscatter signals to terrestrial debris flow activity of the last century. Moreover, turbidite thickness distribution along a transect of four cores allows us to pinpoint numerous events as being related to debris flow activity on a juvenile fan delta. In the sediment core, debris-flow-induced turbidites feature a more gradual fining upward grain size trend and higher TOC (total organic carbon) and delta C-13 values compared to earthquake-induced turbidites. The 4000-year event record contains 138 debris-flow-induced turbidites separated into four phases of similar debris flow activity (df phases). df phase 1 (similar to 2120 to similar to 2040 before the common era - BCE) reflects the second-highest observed event frequencies and is interpreted as being a postseismic landscape response. After a long period of long recurrence intervals without any outstanding increases in debris flow activity during df phase 2 (similar to 2040 BCE to similar to 1520 common era - CE), there are slightly increased event frequencies in df phase 3 (similar to 1520 to similar to 1920 CE). df phase 4 (similar to 1920 to 2018 CE) exhibits a drastic increase in debris flow activity, followed by the overall highest debris flow frequency of the whole record, which is about 7 times higher than during df phase 3. We show that the frequency increase in the debris-flow-induced turbidite record matches a previously postulated increase in debris flow events derived from aerial photography at Plansee in the last century. The triggering of debris flows is more controlled by short, intense precipitation than any other mass movement process, and we demonstrate that lacustrine debris flow records provide a unique inventory of hazard-relevant rainstorm frequencies over decades, centuries, and millennia. The presented increase in debris flow frequency since the start of the 20th century coincides with a twofold enhanced rainstorm activity in the Northern European Alps and, therefore, provides a novel technique for the systematic understanding of non-stationary debris flow frequencies in a changing climate.
CRIS-Team WoS Importer:2021-12-10

A 560 yr summer temperature reconstruction for the Western Mediterranean basin based on stable carbon isotopes from Pinus nigra ssp. laricio (Corsica/France) - Szymczak, Sonja; Bräuning, Achim; et al. (Climate of the Past, 2012)
The Mediterranean is considered as an area which will be affected strongly by current climate change. However, temperature records for the past centuries which can contribute to a better understanding of future climate changes are still sparse for this region. Carbon isotope chronologies from tree-rings often mirror temperature history but their application as climate proxies is difficult due to the influence of the anthropogenic change in atmospheric CO2 on the carbon isotope fractionation during photosynthetic CO2 uptake. We tested the influence of different correction models accounting for plant response to increased atmospheric CO2 on four annually resolved long-term carbon isotope records (between 400 and 800 yr) derived from Corsican pine trees (Pinus nigra ssp. laricio) growing at ecologically varying mountain sites on the island of Corsica. The different correction factors have only a minor influence on the main climate signals and resulting temperature reconstructions. Carbon isotope series show strong correlations with summer temperature and precipitation. A summer temperature reconstruction (1448-2007 AD) reveals that the Little Ice Age was characterised by low, but not extremely low temperatures on Corsica. Temperatures have been to modern temperatures at around 1500 AD. The reconstruction reveals warm summers during 1480-1520 and 1950-2007 AD and cool summers during 1580-1620 and 1820-1890 AD. © Author(s) 2012.
UnivIS-Import:2018-09-06:Pub.2012.nat.dgeo.IG.zentr.a560yr

A 560 yr summer temperature reconstruction for the Western Mediterranean basin based on stable carbon isotopes from Pinus nigra ssp. laricio (Corsica/France). - Szymczak, Sonja; Joachimski, Michael; Bräuning, Achim; Hetzer, Timo; Kuhlemann, Joachim (Climate of the Past, 2012)
The Mediterranean is considered as an area which will be affected strongly by current climate change. However, temperature records for the past centuries which can contribute to a better understanding of future climate changes are still sparse for this region. Carbon isotope chronologies from tree-rings often mirror temperature history but their application as climate proxies is difficult due to the influence of the anthropogenic change in atmospheric CO2 on the carbon isotope fractionation during photosynthetic CO2 uptake. We tested the influence of different correction models accounting for plant response to increased atmospheric CO2 on four annually resolved long-term carbon isotope records (between 400 and 800 yr) derived from Corsican pine trees (Pinus nigra ssp. laricio) growing at ecologically varying mountain sites on the island of Corsica. The different correction factors have only a minor influence on the main climate signals and resulting temperature reconstructions. Carbon isotope series show strong correlations with summer temperature and precipitation. A summer temperature reconstruction (1448–2007 AD) reveals that the Little Ice Age was characterised by low, but not extremely low temperatures on Corsica. Temperatures have been to modern temperatures at around 1500 AD. The reconstruction reveals warm summers during 1480–1520 and 1950–2007 AD and cool summers during 1580–1620 and 1820–1890 AD.
UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.a560yr

A 622-year regional temperature history of southeast Tibet derived from tree rings. - Yang, Bao; Kang, Xingcheng; Bräuning, Achim; Liu, Jian; Qin, Chun; Jingjing, Liu (Holocene, 2010)
A tree ring-width record spanning from AD 1377—1998 was developed from Tibetan juniper (Cupressus gigantea) growing at sites north of the deep gorge of the Yarlung Tsangbo River of southeast Tibet. A linear regression model between ring width and mean January—June temperature accounts for 35% of January—June temperature variance for the period 1961—1998. Based on this model, we reconstructed January—June temperature variation history for the study region during the past 622 years. Warm conditions occurred during AD 1385—1418, 1443—1466, 1482—1501, 1523—1548, 1570s, 1705—1759, 1770—1790, 1851—1888, 1910s, and 1938—1965, and periods of relatively cold years are identified for AD 1419—1442, 1470s, 1502—1522, 1550—1569, 1610—1640, 1680—1700, 1760s, 1791—1850, 1900s and 1965—1995. Spatial correlation between tree rings and observed temperatures indicates that the reconstruction is representative of temperature change for southeast Tibet. Regional cold conditions during AD 1625, 1685, 1760, 1800—1850, 1890—1930 and 1965—1995, and warm conditions during 1710, 1730—1750, 1850—1890 and 1930—1960 can be identified in the eastern Tibetan Plateau. Our reconstruction shows good agreement with modelled regional temperatures derived from an ECHO-G model simulation. Common cold periods around 1470, 1685 and 1845 corresponding to the Spörer Minimum, the Maunder Minimum and the Dalton Minimum periods of low solar activity and increased volcanic activity were identified, indicating that solar and volcanic activity played an important role in temperature change of this region. The discrepancy between modelled and reconstructed temperatures was noted around 1965, reflecting that temperature decrease in the late 20th century (1965—1995) is anomalous.
Keywords: Climate change; Forcing mechanism; Temperature reconstruction; The Asian summer monsoon; Tibetan Plateau; Tree ring-width record

Abenteuer Weltall. Stuttgart 1991 - Hübner, Thomas (1991)

Abies spectabilis shows stable growth relations to temperature, but changing response to moisture conditions along an elevation gradient in the central Himalaya - Gaire, Narayan Prasad; Fan, Ze Xin; Bräuning, Achim; Panthi, Shankar; Rana, Prabina; Shrestha, Arbindra; Bhuju, Dinesh Raj (Dendrochronologia, 2020)
A better understanding of growth-climate responses of high-elevation tree species across their distribution range is essential to devise an appropriate forest management and conservation strategies against adverse impacts of climate change. The present study evaluates how radial growth of Himalayan fir (Abies spectabilis D. Don) and its relation to climate varies with elevation in the Manaslu Mountain range in the central Himalaya. We developed tree-ring width chronologies of Himalayan fir from three elevational belts at the species'upper distribution limit (3750−3900 m), in the middle range (3500−3600 m), and at the lower distribution limit (3200−3300 m), and analyzed their associations with climatic factors. Tree growth of Himalayan fir varied synchronously across elevational belts, with recent growth increases observed at all elevations. Across the elevation gradient, radial growth correlated positively (negatively) with temperature (precipitation and standardized precipitation-evapotranspiration index, SPEI-03) during the summer (July to September) season. However, the importance of summer (July to September) temperatures on radial growth decreased with elevation, whereas correlations with winter (previous November to current January) temperatures increased. Correlations with spring precipitation and SPEI-03 changed from positive to negative from low to high elevations. Moving correlation analysis revealed a persistent response of tree growth to May and August temperatures. However, growth response to spring moisture availability has strongly increased in recent decades, indicating that intensified spring drought may reduce growth rates of Himalayan fir at lower elevations. Under sufficient moisture conditions, increasing summer temperature might be beneficial for fir trees growing at all elevations, while trees growing at the upper treeline will take additional benefit from winter warming.
CRIS-Team Scopus Importer:2020-03-27
Keywords: Central Himalaya; Climate change; Dendroecology; Elevation gradient; Growth-response; Tree rings

A brute-force approach to vegetation classification - Schmidtlein, Sebastian; Tichy, Lubomir; Feilhauer, Hannes; Faude, Ulrike (Journal of Vegetation Science, 2010)
Aim: Introduction of a novel approach to the classification of vegetation data (species by plot matrices). This approach copes with a large amount of noise, groups irregularly shaped in attribute space and species turnover within groups.Method: The proposed algorithm (Isopam) is based on the classification of ordination scores from isometric feature mapping. Ordination and classification are repeated in a search for either high overall fidelity of species to groups of sites, or high quantity and quality of indicator species for groups of sites. The classification is performed either as a hierarchical, divisive method or as non-hierarchical partitioning. In divisive clustering, resulting groups are subdivided until a stopping criterion is met. Isopam was tested on 20 real-world data sets. The resulting classifications were compared with solutions from eight widely used clustering algorithms.Results: When looking at the significance of species fidelities to groups of sites, and at quantity and quality of indicator species, Isopam often achieved high ranks as compared with other algorithms. © 2010 International Association for Vegetation Science.
Keywords: Cluster optimization; Indicator species; Isomap; Isometric feature mapping; Isopam; Twinspan; Vegetation databases

Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry - Diener, Theresa; Sasgen, Ingo; Agosta, Cécile; Fürst, Johannes; Braun, Matthias; Konrad, Hannes; Fettweis, Xavier (Frontiers in Earth Science, 2021)
The dynamic stability of the Antarctic Ice Sheet is one of the largest uncertainties in projections of future global sea-level rise. Essential for improving projections of the ice sheet evolution is the understanding of the ongoing trends and accelerations of mass loss in the context of ice dynamics. Here, we examine accelerations of mass change of the Antarctic Ice Sheet from 2002 to 2020 using data from the GRACE (Gravity Recovery and Climate Experiment; 2002–2017) and its follow-on GRACE-FO (2018-present) satellite missions. By subtracting estimates of net snow accumulation provided by re-analysis data and regional climate models from GRACE/GRACE-FO mass changes, we isolate variations in ice-dynamic discharge and compare them to direct measurements based on the remote sensing of the surface-ice velocity (2002–2017). We show that variations in the GRACE/GRACE-FO time series are modulated by variations in regional snow accumulation caused by large-scale atmospheric circulation. We show for the first time that, after removal of these surface effects, accelerations of ice-dynamic discharge from GRACE/GRACE-FO agree well with those independently derived from surface-ice velocities. For 2002–2020, we recover a discharge acceleration of -5.3 ± 2.2 Gt yr−2 for the entire ice sheet; these increasing losses originate mainly in the Amundsen and Bellingshausen Sea Embayment regions (68%), with additional significant contributions from Dronning Maud Land (18%) and the Filchner-Ronne Ice Shelf region (13%). Under the assumption that the recovered rates and accelerations of mass loss persisted independent of any external forcing, Antarctica would contribute 7.6 ± 2.9 cm to global mean sea-level rise by the year 2100, more than two times the amount of 2.9 ± 0.6 cm obtained by linear extrapolation of current GRACE/GRACE-FO mass loss trends.
Keywords: Antarctica; GRACE/GRACE-FO; ice-dynamic discharge; surface mass balance; sea-level rise (SLR); mass balance; ISMIP6; climate indices

Access to and exclusion from housing over time: Refugees' experiences in rural areas - Weidinger, Tobias; Kordel, Stefan (International Migration, 2020)
Taking the example of recognized refugees in rural Germany, and following the housing pathways approach, the paper addresses the complex interplay of individual and family‐related residential preferences over time as well as structural factors regarding access to housing and associated settlement and integration. Results are from a long‐term empirical study that encompassed both refugees’ and local actors’ views. Mechanisms and practices of exclusion that prevent refugees from accessing appropriate private housing are related to the negotiation of residential preferences about where and how to live, as well as to structural aspects such as the pattern of local housing markets, accessibility of infrastructures or the unwillingness of landlords to let to refugees. The paper concludes to highlight the role of place in housing trajectories and the significance of social resources within refugees' practices and local intermediaries' strategies to overcome exclusion and provision of access to rural housin

Accounting for multiple ecosystem services in a simulation of land-use decisions: Does it reduce tropical deforestation? - Knoke, Thomas; Paul, Carola; Rammig, Anja; Gosling, Elizabeth; Hildebrandt, Patrick; Härtl, Fabian; Peters, Thorsten; Richter, Michael; Diertl, Karl-Heinz; Castro, Luz Maria; Calvas, Baltazar; Ochoa, Santiago; et al. (Global Change Biology, 2020)
Conversion of tropical forests is among the primary causes of global environmental change. The loss of their important environmental services has prompted calls to integrate ecosystem services (ES) in addition to socio-economic objectives in decision-making. To test the effect of accounting for both ES and socio-economic objectives in land-use decisions, we develop a new dynamic approach to model deforestation scenarios for tropical mountain forests. We integrate multi-objective optimization of land allocation with an innovative approach to consider uncertainty spaces for each objective. These uncertainty spaces account for potential variability among decision-makers, who may have different expectations about the future. When optimizing only socio-economic objectives, the model continues the past trend in deforestation (1975–2015) in the projected land-use allocation (2015–2070). Based on indicators for biomass production, carbon storage, climate and water regulation, and soil quality, we show that considering multiple ES in addition to the socio-economic objectives has heterogeneous effects on land-use allocation. It saves some natural forest if the natural forest share is below 38%, and can stop deforestation once the natural forest share drops below 10%. For landscapes with high shares of forest (38%–80% in our study), accounting for multiple ES under high uncertainty of their indicators may, however, accelerate deforestation. For such multifunctional landscapes, two main effects prevail: (a) accelerated expansion of diversified non-natural areas to elevate the levels of the indicators and (b) increased landscape diversification to maintain multiple ES, reducing the proportion of natural forest. Only when accounting for vascular plant species richness as an explicit objective in the optimization, deforestation was consistently reduced. Aiming for multifunctional landscapes may therefore conflict with the aim of reducing deforestation, which we can quantify here for the first time. Our findings are relevant for identifying types of landscapes where this conflict may arise and to better align respective policies.
CRIS-Team Scopus Importer:2020-02-25
Keywords: biodiversity; ecosystem services; Ecuador; land allocation; landscape restoration; robust optimization

Accuracy-Aware Compression of Channel Impulse Responses using Deep Learning - Altstidl, Thomas Robert; Kram, Sebastian; Herrmann, Oskar; Stahlke, Maximilian; Feigl, Tobias; Mutschler, Christopher (Proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN 2021), 2021)
Ultra-wideband (UWB) systems based on Channel State Information (CSI) estimate the position of mobile nodes within an environment by using Channel Impulse Responses(CIRs) of multiple stationary nodes. These contain spatial information caused by environment interactions such as reflections and scattering. To estimate positions from CSI of stationary nodes, we must transmit them to a centralized node. This introduces considerable communication overhead. We present a large-scale study to determine whether CSI can be compressed into a small set of underlying latent variables that describe the most valuable information. We evaluate multiple neural network architectures containing encoding (compressing)and decoding (reconstructing) components and compare them to the state-of-the-art compression techniques Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). We show that fully connected autoencoders achieve the lowest error, outperforming both DCT and DWT. Further experiments prove that the reconstructed CSI can be used for positioning with only mild performance deterioration at a compression of >97% and even when trained on a different environmen
Keywords: Compression; Channel Impulse Response; Channel State Information; DCT; DWT; (Variational) Autoencoder.

Accuracy of UAV Photogrammetry in Glacial and Periglacial Alpine Terrain: A Comparison With Airborne and Terrestrial Datasets - Groos, Alexander Raphael; Aeschbacher, Reto; Fischer, Mauro; Kohler, Nadine; Mayer, Christoph; Senn-Rist, Armin (Frontiers in Remote Sensing, 2022)
Unoccupied Aerial Vehicles (UAVs) equipped with optical instruments are increasingly deployed in high mountain environments to investigate and monitor glacial and periglacial processes. The comparison and fusion of UAV data with airborne and terrestrial data offers the opportunity to analyse spatio-temporal changes in the mountains and to upscale findings from local UAV surveys to larger areas. However, due to the lack of gridded high-resolution data in alpine terrain, the specific challenges and uncertainties associated with the comparison and fusion of multi-temporal data from different platforms in this environment are not well known. Here we make use of UAV, airborne, and terrestrial data from four (peri)glacial alpine study sites with different topographic settings. The aim is to assess the accuracy of UAV photogrammetric products in complex terrain, to point out differences to other products, and to discuss best practices regarding the fusion of multi-temporal data. The surface geometry and characteristic geomorphological features of the four alpine sites are well captured by the UAV data, but the positional accuracies vary greatly. They range from 15 cm (root-mean-square error) for the smallest survey area (0.2 km2) with a high ground control point (GCP) density (40 GCPs km−2) to 135 cm for the largest survey area (>" role="presentation">>2.5 km2) with a lower GCP density (<" role="presentation"><10 GCPs km−2). Besides a small number and uneven distribution of GCPs, a low contrast, and insufficient lateral image overlap (<" role="presentation"><50–70%) seem to be the main causes for the distortions and artefacts found in the UAV data. Deficiencies both in the UAV and airborne data are the reason for horizontal deviations observed between the datasets. In steep terrain, horizontal deviations of a few decimetres may result in surface elevation change errors of several metres. An accurate co-registration and evaluation of multi-temporal UAV, airborne, and terrestrial data using tie points in stable terrain is therefore of utmost importance when it comes to the investigation of surface displacements and elevation changes in the mountains. To enhance the accuracy and quality of UAV photogrammetry, the use of UAVs equipped with multi-spectral cameras and high-precision positioning systems is recommended, especially in rugged terrain and snow-covered area
Keywords: Alps; cryosphere; drone survey; data fusion; glacier monitoring; orthophoto; DSM; OpenDroneMap

A comparison of various relative radiometric correction approaches for LANDSAT imagery - Braun, Matthias; et al. (IGARRS Symposium 2003, 2003)
UnivIS-Import:2015-04-20:Pub.2003.nat.dgeo.IG.pgfgis.acompa

A consensus estimate for the ice thickness distribution of all glaciers on Earth - Farinotti, Daniel; Huss, Matthias; Fürst, Johannes; Landmann, Johannes; Machguth, Horst; Maussion, Fabien; Pandit, Ankur (Nature Geoscience, 2019)
Knowledge of the ice thickness distribution of the world's glaciers is a fundamental prerequisite for a range of studies. Projections of future glacier change, estimates of the available freshwater resources or assessments of potential sea-level rise all need glacier ice thickness to be accurately constrained. Previous estimates of global glacier volumes are mostly based on scaling relations between glacier area and volume, and only one study provides global-scale information on the ice thickness distribution of individual glaciers. Here we use an ensemble of up to five models to provide a consensus estimate for the ice thickness distribution of all the about 215,000 glaciers outside the Greenland and Antarctic ice sheets. The models use principles of ice flow dynamics to invert for ice thickness from surface characteristics. We find a total volume of 158 +/- 41 x 10(3) km(3), which is equivalent to 0.32 +/- 0.08 m of sea-level change when the fraction of ice located below present-day sea level (roughly 15%) is subtracted. Our results indicate that High Mountain Asia hosts about 27% less glacier ice than previously suggested, and imply that the timing by which the region is expected to lose half of its present-day glacier area has to be moved forward by about one decade.
CRIS-Team WoS Importer:2019-03-15

A contribution to soil fertility assessment for arid and semi-arid lands - Hag Mohamed Husein, Hussam; Lucke, Bernhard; Bäumler, Rupert; Sahwan, Wahib (Soil Systems, 2021)
Soil fertility must be viewed as a dynamic concept that involves the constant cycling of nutrients between organic and inorganic forms. In this context, it refers also to supply adequate amounts of water and aeration for plant growth. Soil fertility under arid and semi-arid lands is constrained not only by limited water availability but also by small organic matter contents. Most fertility assessment systems are based on organic matter contents as the main parameter. However, crop experiments from various irrigated arid and semi-arid soils indicate that productivity is less-affected by organic matter contents than assumed. Therefore, we propose a new soil fertility system for dryland soils. It is a rule-based set of algorithms, mainly using additions and subtractions. Soil, climate, and landscape factors are integrated to calculate the numerical value of fertility for a given soil. We expect the system, which is focused on soil properties that keep or increase optimum soil moisture (such as texture), to be applicable in arid and semi-arid lands and to provide more realistic estimates of fertility regarding agricultural purposes. The manuscript will provide an outline of the main aspects of the system, illustrated by various case applications.
CRIS-Team Scopus Importer:2021-08-20
Keywords: Ac-quired fertility; Inherent fertility; Nonagricultural land; Nutrients; Organic matter; Water retention

Actor modelling and its contributions to the development of integrative strategies for management of pharmaceuticals in drinking water - Titz, Alexandra; Döll, Petra (Social science & medicine, 2009)
Widespread presence of human pharmaceuticals in water resources across the globe is documented. While some, but certainly not enough, research on the occurrence, fate and effect of pharmaceuticals in water resources has been carried out, a holistic risk management strategy is missing. The transdisciplinary research project "start" aimed to develop an integrative strategy by the participation of experts representing key actors in the problem field "pharmaceuticals in drinking water". In this paper, we describe a novel modelling method, actor modelling with the semi-quantitative software DANA (Dynamic Actor Network Analysis), and its application in support of identifying an integrative risk management strategy. Based on the individual perceptions of different actors, the approach allows the identification of optimal strategies. Actors' perceptions were elicited by participatory model building and interviews, and were then modelled in perception graphs. Actor modelling indicated that an integrative strategy that targets environmentally-responsible prescription, therapy, and disposal of pharmaceuticals on one hand, and the development of environmentally-friendly pharmaceuticals on the other hand, will likely be most effective for reducing the occurrence of pharmaceuticals in drinking water (at least in Germany where the study was performed). However, unlike most other actors, the pharmaceutical industry itself does not perceive that the production of environmentally-friendly pharmaceuticals is an action that helps to achieve its goals, but contends that continued development of highly active pharmaceutical ingredients will help to reduce the occurrence of pharmaceuticals in the water cycle. Investment in advanced waste or drinking water treatment is opposed by both the wastewater treatment company and the drinking water supplier, and is not mentioned as appropriate by the other actors. According to our experience, actor modelling is a useful method to suggest effective and realisable integrative risk management strategies in complex problem fields that involve many societal actors. © 2008 Elsevier Ltd. All rights reserve
UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IG.zentr.actorm_0
Keywords: Actor modelling; DANA (Dynamic Actor Network Analysis); Drinking water; Germany; Pharmaceuticals; Risk management strategy

A dendrochronological evaluation of the effects of air pollution on radial growth of ash tree (Fraxinus excelsior) in Tehran - Safdari, Vahidreza Reza; Parsapajouh, Davoud; Hemasi, Amir Homan; Bräuning, Achim (Iranian Journal of Natural Resources, 2006)
Tehran as one of the most polluted cities in the world is a good candidate for an evaluation of pollution (from vehicles) effect on radial growth of ash (Fraxinus excelsior) trees. Since ash trees in Azadi square (most polluted site) and Sorkhehesar as well as Chitgar Parks (control or unpolluted sites) were not of the same age, a comparison of ring widths was made only after cross dating and standardization. Concentrations of Pb, Mn, Ba, Cu, and Zn in tree rings determined through ICP (Inductive Couple Plasma Spectroscopy) indicated no significant difference among tree rings (grouped in 5- year intervals) and no significant differences among sites (blocks). There was no significant difference observea among indices in ash trees at the three sites, indicating that pollution did not have any noticeable effect on the radial growth in ash trees.
UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IG.LGIPDT.adendr
Keywords: Air pollution; Ash (Fraxinus Excelsior); Ring width; Cross dating; Radial growth

A DENDROECOLOGICAL FIRE HISTORY for CENTRAL CORSICA/FRANCE - Szymczak, Sonja; Bräuning, Achim; Häusser, Martin; Garel, Emilie; Huneau, Frederic; Santoni, Sebastien (Tree-Ring Research, 2020)
Forest fires are an important factor shaping Mediterranean ecosystems and determine the distribution of different species. Information about past forest fires can be obtained with pyrodendroecology. Here, we present a fire history for three sites in the mountain forest belt on the island of Corsica in the Mediterranean Basin. The dating of scars from cores, stem discs, and wedges from 101 pine trees (Pinus nigra and Pinus pinaster) allowed the reconstruction of six definite fire events between 1800 and 2017. Additionally, we reconstructed the spatial extent of a large fire event at AD 2000 with remote sensing data. The study sites are affected by different types of fires. The even-aged forest structure at two sites is clear evidence of past lethal fires, whereas the old-growth Pinus nigra forest at the third site represents the final stage of succession under current climate conditions. The current distribution of both pine species can at least partly be regarded as a result of varying fire frequency at different sites. Although Pinus pinaster stands dominate in areas with frequent fires and can even replace Pinus nigra in cases of high fire frequency, Pinus nigra dominates in areas with low fire frequencies.
CRIS-Team Scopus Importer:2020-02-04
Keywords: forest fire; Mediterranean Basin; Pinus nigra; Pinus pinaster; pyrodendroecology; remote sensing

A description of methods for deriving air pollution land use regression model predictor variables from remote sensing data in Ulaanbaatar, Mongolia - Yuchi, Weiran; Knudby, Anders J.; Cowper, Joanna; Gombojav, Enkhjargal; Amram, Ofer; Walker, Blake; Allen, Ryan W. (Canadian Geographer-Geographe Canadien, 2016)
Air pollution is a major risk factor for death and disease, particularly in low‐ and middle‐income countries (LMIC) where concentrations are relatively high and large populations are exposed. High‐quality exposure assessment is integral to both air pollution epidemiologic studies and impact assessments. Land use regression (LUR) modelling is a powerful exposure assessment technique that uses the relationships between air pollution concentrations at discrete monitoring locations and the surrounding characteristics of those locations to model small‐scale spatial concentration gradients within cities. Regardless of whether they are calibrated based on local measurements or transferred from another location, LUR models require spatially resolved data on predictor variables that may be unavailable or of insufficient quality in many settings. We describe methods for deriving LUR model predictors, including land cover, road locations, and ger (Mongolian yurt) locations, from satellite data and high‐resolution imagery in Ulaanbaatar, Mongolia. These methods may allow LUR models to be developed for more locations in LMIC, potentially improving the quality of air pollution exposure assessments in those settings.
Keywords: geographic information systems (GIS); interpolation; exposure; particulate matter; remote sensing; systèmes d'information géographique (SIG); interpolation; exposition; particules fines; télédétection

A Detailed, Multi-Scale Assessment of an Atmospheric River Event and Its Impact on Extreme Glacier Melt in the Southern Alps of New Zealand - Kropac, Elena; Mölg, Thomas; Cullen, Nicolas J.; Collier, Emily; Pickler, Carolyne; Turton, Jenny (Journal of Geophysical Research: Atmospheres, 2021)
North-westerly airflow and associated atmospheric rivers (ARs) have been found to profoundly influence New Zealand’s west coasts, by causing flooding, landslides and extreme ablation and accumulation on glaciers in the Southern Alps. However, the response of local glacier mass balance to synoptic-scale circulation, including events with ARs, has typically not been investigated by considering mesoscale processes explicitly. In this study, high-resolution atmospheric simulations from the Weather Research and Forecasting model are used to investigate the mesoscale drivers of an extreme ablation event on Brewster Glacier (Southern Alps), which occurred on February 6, 2011 during the landfall of an AR on the South Island. The following processes were found to be crucial for transferring the high temperature and water vapor contained in the AR into energy available for melt on Brewster Glacier: First, the moist-neutral character of the air mass enabled the flow to pass over the ridge, leading to the development of orographic clouds and precipitation on the windward side of the orography, and foehn winds on the leeside. These processes fueled melt through longwave radiation and strong turbulent and rain heat fluxes within the high-condensation environment of the orographic cloud. Second, orographic enhancement occurred due to both cellular convection within the cloud and the combined effect of multiple precipitating systems by the seeder-feeder-mechanism. These results indicate the potential importance of AR dynamics for New Zealand’s glaciers. They also illustrate the benefit of mesoscale atmospheric modeling for advancing process understanding of the glacier-climate relationship in New Zealand.
CRIS-Team Scopus Importer:2021-05-21
Keywords: Atmospheric river; glacier ablation; mesoscale processes; New Zealand Southern Alps; orographic precipitation; WRF

A Digital Global Map of Artificially Drained Agricultural Areas. - Feick, Sebastian; Siebert, Stefan; Döll, Petra (2005)
Artificial drainage of agricultural land, for example with ditches or drainage tubes, is used to avoid water logging and to manage high groundwater tables. Among other things it influences the nutrient balances by increasing leaching losses and by decreasing denitrification. To simulate terrestrial transport of nitrogen on a global scale, a digital global map of artificially drained agricultural areas was developed. The map depicts the percentage of each 5’ by 5’ grid cell that is equipped for artificial drainage. Information on artificial drainage in countries or sub-national units mainly derived by information from international data sets. Distribution to grid cells was based, for most countries, on the “Global Croplands Dataset” of Ramankutty et al. (1998) and the “Digital Global Map of Irrigation Areas” of Siebert et al. (2005). For some European countries CORINE land cover dataset was used instead of the both datasets mentioned above. Maps with outlines of artificially drained areas were available for 6 countries. The global drainage area on the map is 167 Mio hectares. For only 11 out of the 116 countries with information on artificial drainage areas, subnational information could be taken into account. Due to this coarse spatial resolution of the data sources, we recommended to use the map of artificially drained areas only for continental to global scale assessments. This documentation describes the dataset, the data sources and the map generation, and it discusses the data uncertainty.
UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IG.zentr.adigit
Keywords: data set; digital map; hydrology; artificial drainage

A digitial map of irrigated areas - An update for Asia - Siebert, Stefan; Feick, Sebastian; Hoogeveen, Jippe (., 2005)
Agriculture is by far the largest water-use sector, accounting for about 70 percent of all water withdrawn worldwide from rivers and aquifers for agricultural, domestic and industrial purposes. In several developing countries, irrigation represents up to 95 percent of all water withdrawn, and it plays a major role in food production and food security. The agriculture development strategies of most of these countries depend on the possibility of maintaining, improving and expanding irrigated agriculture. However, as the pressure on water resources increases, irrigation is facing growing competition from other water-use sectors and becoming a threat to the environment in an increasing number of regions. In the last decade, the international community has made major efforts to assess the different elements of the water balance and to predict current and future water needs for the different use sectors. However, considerable uncertainty remains concerning the extent and distribution of irrigated land in the world and on agricultural water use, therefore, making it difficult to monitor the irrigation sector adequately. Coverage of irrigated areas in the world, available in a geographical information system (GIS), is the single most important item of information needed to improve future global studies on water and food. The first version of the Digital Global Map of Irrigated Areas was published in 1999 (see table). It consisted of a raster map with a resolution of 0.5 ° by 0.5 ° containing the percentage of the area that was equipped for irrigation around 1995, the so-called irrigation density. To further develop and improve the global GIS coverage of areas equipped for irrigation and to make it available to users in the international community, cooperation was established between the Johann Wolfgang Goethe University in Frankfurt am Main, Germany, and the Land and Water Development Division of the Food and Agriculture Organization of the United Nations (FAO). Through this cooperation, the mapping project has been linked closely to the FAO global information system on water and agriculture, Aquastat. The Aquastat programme collects and disseminates data and information by country and by region. Its aim is to provide users interested in global, regional and national analysis (e.g. policy-makers, decision-makers and researchers) with the most accurate, reliable, consistent and up-to-date information available on water resources and agricultural water management. In order to make thorough analyses, the Aquastat programme collects data from many different sources including national water resources and irrigation master plans, statistics and yearbooks, FAO technical reports, and national and international surveys and reports made available by national and international research centres. The data collected through the Aquastat programme have served as the main source for improving the overall quality and resolution of the Digital Global Map of Irrigated Areas. In addition, the methodology for producing the map has been improved substantially. This has made it possible to increase the spatial resolution of the map to 5 minutes, thus justifying the publication of an improved second version of the Digital Global Map of Irrigated Areas. For Version 2, updated maps of Latin America, Europe, Africa and Oceania have been published. The next step in improving the dataset is the inclusion of the continent of Asia, which is presented in this document. For the update of the map of Asia, an inventory of subnational irrigation statistics for the continent was compiled. Irrigation maps were derived from project reports, irrigation subsector studies and books related to irrigation and drainage and were compared with satellite images in many regions. The reference year for the update of the map is 2000.
UnivIS-Import:2015-04-02:Pub.2005.nat.dgeo.IG.zentr.adigit_7
Keywords: data set; digital map; irrigation; hydrology; Asia

A Drone-Based 0.7-4.7 GHz FMCW Radar System for High-Resolution Exploration of Subsurface Glacier Structures - Stelzig, Michael; Benedikter, Andreas; Kleinlein, Micha; Haberberger, Niklas; Krabbe, Lena; Lomakin, Konstantin; Braun, Matthias; Krieger, Gerhard; Vossiek, Martin (2023 IEEE International Radar Conference (RADAR), 2023)
A majority of the studies on subglacial structure mapping and imaging have relied on low-frequency ground penetrating radar (GPR) systems. In particular, mapping alpine glaciers using surface-based high-resolution radar sensors poses a considerable threat to the operators due to crevasses or avalanches; this can be avoided by deploying an unpiloted aerial vehicle (UAV)-based radar sensor. Herein, we present an ultrawideband (UWB) bistatic frequency-modulated continuous-wave (FMCW) GPR for operation on a UAV. By using a UAV equipped with ultrawideband and extremely lightweight additively manufactured horn antennas at a bandwidth of 4GHz between 0.7 GHz and 4.7 GHz we acquired ultra-high-resolution images of the upper firn layers of an alpine glacier. The acquired measurements at the Jungfraufirn, Switzerland illustrate the out-standing performance of the overall system and its applicability in glaciological research.<br
Keywords: Ground penetrating radar; Horn antennas; Radar; Bandwidth; Radar imaging; Radar antennas; Autonomous aerial vehicles; Unpiloted Aerial Vehicle; Frequency-Modulated Continuous-Wave Radar; Horn Antenna; Subsurface Imaging; Glacial Exploration; Ground Penetrating Radar

A dual stable isotope approach unravels common climate signals and species-specific responses to environmental change stored in multi-century tree-ring series from the Tibetan plateau - Grießinger, Jussi; Bräuning, Achim; Helle, Gerhard; Schleser, Gerhard Hans; Hochreuther, Philipp; Meier, Wolfgang; Zhu, Haifeng (Geosciences, 2019)
Tree-rings are recorders of environmental signals and are therefore often used to reconstruct past environmental conditions. In this paper, we present four annually resolved, multi-centennial tree-ring isotope series from the southeastern Tibetan plateau. The investigation site, where juniper and spruce trees jointly occur, is one of the highest known tree-stands in the world. Tree ring cellulose oxygen (δ 18 O) and carbon (δ 13 C) isotopes were analyzed for a common period of 1685–2007 AD to investigate climate–isotope relationships. Therefore, various climate parameters from a local meteorological station and from the CRU 4.02 dataset were used. Tree-ring δ 18 O of both species revealed highly significant sensitivities with a high degree of coherence to hydroclimate variables during the growing season. The obtained δ 18 O–climate relationships can even be retained using a species mean. In contrast, the individual δ13C series indicated a weaker and non-uniform response to the tested variables. Underlying species-specific responses and adaptations to the long-term trend in atmospheric CO 2 bias even after a trend correction identified dominant environmental factors triggering the tree-ring δ 13 C at our site. However, analysis of individual intrinsic water-use efficiency in juniper and spruce trees indicated a species-specific adaptation strategy to climate change.
CRIS-Team Scopus Importer:2019-05-02
Keywords: Intrinsic water-use efficiency (iWUE); Juniperus tibetica; Multi-centennial isotope time-series; Picea balfouriana; Tibetan plateau; tree-ring δ18O; tree-ring δ13C

Afforestation or intense pasturing improve the ecological and economic value of abandoned tropical farmlands - Knoke, Thomas; Bendix, Joerg; Pohle, Perdita; Hamer, Ute; Hildebrandt, Patrick; Roos, Kristin; Gerique, Andrés; Sandoval, Maria L.; Breuer, Lutz; Tischer, Alexander; Silva, Brenner; Calvas, Baltazar; et al. (Nature Communications, 2014)
Increasing demands for livelihood resources in tropical rural areas have led to progressive clearing of biodiverse natural forests. Restoration of abandoned farmlands could counter this process. However, as aims and modes of restoration differ in their ecological and socio-economic value, the assessment of achievable ecosystem functions and benefits requires holistic investigation. Here we combine the results from multidisciplinary research for a unique assessment based on a normalization of 23 ecological, economic and social indicators for four restoration options in the tropical Andes of Ecuador. A comparison of the outcomes among afforestation with native alder or exotic pine, pasture restoration with either low-input or intense management and the abandoned status quo shows that both variants of afforestation and intense pasture use improve the ecological value, but low-input pasture does not. Economic indicators favour either afforestation or intense pasturing. Both Mestizo and indigenous Saraguro settlers are more inclined to opt for afforestation.
Keywords: Agroecology; Restoration ecology

A first attempt to model region-wide glacier surface mass balances in the Karakoram: findings and future challenges - Groos, Alexander Raphael; Mayer, Christoph; Smiraglia, Claudio; Diolaiuti, Guglielmina; Lambrecht, Astrid (Geografia Fisica E Dinamica Quaternaria, 2017)

Afrikanischer Urbanismus – Sind afrikanische Städte “anders”? - Krüger, Fred (Modulør : Architektur, Immobilien, Recht, 2023)

Afterword - Haddad, Laura; Winkler, Jan; Martínez-Ariño, Julia; Mezzetti, Giulia (Interreligious Encounters in Europe - Sites, Materialities and Practices, 2023)

Ages of major Little Ice Age glacier fluctuations on the southeast Tibetan Plateau derived from tree-ring-based moraine dating - Hochreuther, Philipp; Loibl, David; Wernicke, Jakob; Zhu, Haifeng; Grießinger, Jussi; Bräuning, Achim (Palaeogeography, Palaeoclimatology, Palaeoecology, 2015)
Advances and retreats of glaciers on the Tibetan Plateau (TP) are widely regarded as indicators for climate changes sensitive to macroclimatic forcing mechanisms like the Asian summer monsoon. However, it often remains unclear why some glaciers retreat or advance earlier than others, particularly regarding the timing of the so-called ‘Little Ice Age (LIA) maximum’. Within this study, we present newly acquired tree-ring data from four glacier forefields in the Nyainqêntanglha Range on the southeastern TP and link them to previous studies. Two of the glaciers formed a double-tongue moraine set during the LIA, with trees providing minimum ages for two different major glacier extents. In combination with evidence from a third glacier, three warm phases within the generally cold LIA can be deduced during the first half of the 16th century, and the mid-17th and 18th centuries. This implies the occurrence of three preceding major cold spells. A minor cool phase between 1790 and 1850 marks the end of the LIA on the southeast TP. Minimum ages for beginning retreat from the last major LIA glacial advance differ by only 40 years for all sampled monsoonal temperate valley glaciers in the Nyainqêntanglha Range. This implies a common forcing, whose impact on glacier dynamics is only slightly altered by topographical factors or local climatic conditions. Regression analysis suggests that the delay of the glacier retreat from the maximum extent is mainly related to glacier size, with minor influence of ablation area aspect. All moraine ages highlight intermediate LIA warm phases on the southeast TP corresponding to warm phases on the northern Hemisphere and thus prove monsoonal temperate glaciers to be highly sensitive archives for northern hemispheric climatic conditions.
Keywords: Dendroglaciology; Tibetan Plateau; Glacier history; Tree rings; Moraine dating

A GIS Analysis of East Asian Care Gaps in Residential and Assisted Living Facilities in Vancouver, Canada - Walker, Blake; Canham, Sarah L.; Wister, Andrew; Fang, Mei Lan (Journal of Housing for the Elderly, 2019)
Residential care and assisted living services provide support to seniors who may not have the ability to live independently. However, East Asian residents often do not have sufficient access to culturally specific activities, which may result in psychosocial stress and isolation. This study presents a geographic analysis method to evaluate spatial distribution of culturally tailored senior care facilities in Metro Vancouver. We identify geographical disparities, indicating that many East Asian seniors have poor local access to a culturally tailored facility. We recommend the use of geographical analysis techniques to improve the analysis and planning for senior care in an increasingly diverse populatio

A GIS-based spatiotemporal analysis of violent trauma hotspots in Vancouver, Canada: Identification, contextualisation and intervention - Walker, Blake; Schuurman, Nadine; Hameed, Syed Morad (BMJ Open, 2014)
Background In 2002, the WHO declared interpersonal violence to be a leading public health problem. Previous research demonstrates that urban spaces with a high incidence of violent trauma (hotspots) correlate with features of built environment and social determinants. However, there are few studies that analyse injury data across the axes of both space and time to characterise injury–environment relationships. This paper describes a spatiotemporal analysis of violent injuries in Vancouver, Canada, from 2001 to 2008. Methods Using geographic information systems, 575 violent trauma incidents were mapped and analysed using kernel density estimation to identify hotspot locations. Patterns between space, time, victim age and sex and mechanism of injury were investigated with an exploratory approach. Results Several patterns in space and time were identified and described, corresponding to distinct neighbourhood characteristics. Violent trauma hotspots were most prevalent in Vancouver's nightclub district on Friday and Saturday nights, with higher rates in the most socioeconomically deprived neighbourhoods. Victim sex, age and mechanism of injury also formed strong patterns. Three neighbourhood profiles are presented using the dual axis of space/time to describe the hotspot environments. Conclusions This work posits the value of exploratory spatial data analysis using geographic information systems in trauma epidemiology studies and further suggests that using both space and time concurrently to understand urban environmental correlates of injury provides a more granular or higher resolution picture of risk. We discuss implications for injury prevention and control, focusing on education, regulation, the built environment and injury surveillance.

A Glimpse Over the Rising Walls: The Reflection of Post-Communist Transformation in the Polish Discourse of Gated Communities - Glasze, Georg; Pütz, Robert; Gasior-Niemiec, Anna (East European Politics and Societies, 2009)
The authors focus on societal perceptions of the Polish post-communist transformation as reflected in the rising discourse of gated communities. Guarded, (video-) controlled and/or walled housing estates have been on the sprawl in the Polish metropolises throughout the 1990s and 2000s. However, only recently they have been discursively constructedg"under the banner of g gated communitiesgg"as a social and political issue in the country. The authors look at this issue from a vantage point offered by Laclau and Mouffe's theory of discourse, which allows the authors to combine a spatial and a linguistic analytical perspective. The analysis emphasizes the manner in which societal perceptions of borders surrounding gated communities overlap with perceptions of boundaries being inscribed in the social structure of post-communist Poland, while the resulting sociog"spatial configurations are taken to signify political cleavages inherent in the Polish nation. © 2009 Sage Publications.
UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IG.LGIPDK.aglimp
Keywords: Discourse; Gated communities; Laclau; Mouffe; Poland; Post-communist transformation

A global solution to local urban crises Comparing discourses on business improvement districts in Cape Town and Hamburg - Michel, Boris (Urban Geography, 2013)
This paper presents findings from research on the globalization of Business Improvement Districts (BIDs). Across a wide range of urban contexts, Business Improvement Districts are presented as prime strategies for resolving what is framed as an urban crisis and a crisis of urban public space. Building on a discourse analytical approach and on recent debates on mobile policies, I argue for a place sensitive approach that starts from the local and takes local trajectories seriously, but at the same time engages in comparative research. The case studies from Hamburg and Cape Town focus on public discourses in the early years of the implementation of BIDs in the respective contexts. After presenting brief descriptions of these discourses and the rationalization within different urban and national contexts, I highlight the links the discourses on BIDs establish, with notions of international best practices and international showcases; the way BIDs reframe notions of public space; and the way BIDs are constituted as the legitimate voice of the local common good. [Key words: comparative urbanism, discourse analysis, business improvement districts, urban policy mobilities]. © 2013 Taylor & Francis.

Agricultural suitability of dune system and Limpopo Basin soils near Xai-Xai, Mozambique - Bäumler, Rupert; Samimi, Cyrus; Brandt, Martin (South African Journal of Plant and Soil, 2009)
Quaternary dune systems, as well as the Limpopo Basin near the rural city of Xai-Xai in southern Mozambique were studied concerning their soil fertility and sustainability for crop cultivation. Due to population growth, most sites, which are not overbuilt, are used for crop production. The Arenosols and Regosols of the dune area have slope of 20° and sandy textures. A poor water-holding capacity and a low capability of bonding nutrients are the consequence. A lack of food prevents a disciplined crop rotation including longer fallow periods. Despite persistent cultivation for decades, the soils have a high base saturation, but already a slight decline in the base saturation has considerable effects on crop quality. Shifting cultivation along the coastal dunes leads to a massive clearing of woodlands which destabilises the sensitive dune systems and exposes them to erosion. The Fluvisols of the Limpopo River valley on the other hand cannot be used without restrictions either. High salt contents influence plant growth and the clayey soils constrain root penetration, water availability, drainage and cultivation. Nevertheless, the soils are rich in nutrients and organic matter, and there is no water stress, even during the dry season. The valley soils appear to be a reasonable platform for agriculture.
UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IG.profes_1.agricu
Keywords: Arenosol; Dune soils; Fluvisol; South-East Africa; Tropical soils

Aigner, Lisa: Fränkische Schweiz mit Oberem Maintal und Hersbrucker Schweiz. Innsbruck 2021 - Hübner, Thomas (2022)

Aigner, Lisa: Steigerwald mit Haßbergen und Frankenhöhe : 55 Touren. Innsbruck 2022 - Hübner, Thomas (2022)

Air mass origin signals in δ 18O of tree-ring cellulose revealed by back-trajectory modeling at the monsoonal Tibetan plateau - Wernicke, Jakob; Hochreuther, Philipp; Grießinger, Jussi; Zhu, Haifeng; Wang, Lily; Bräuning, Achim (International Journal of Biometeorology, 2017)
Keywords: Backward trajectory; Tibetan plateau; Asian summer monsoon; Tree-ring δ18O

Air mass signals in δ18O of tree-ring cellulose revealed by back-trajectory modeling at the monsoonal Tibetan plateau - Wernicke, Jakob; Hochreuther, Philipp; Grießinger, Jussi; Zhu, Haifeng; Wang, Lily; Bräuning, Achim (International Journal of Biometeorology, 2017)
A profound consideration of stable oxygen isotope source water origins is a precondition for an unambiguous palaeoenvironmental interpretation of terrestrial δ18O archives. To stress the influence of air mass origins on widely used δ18O tree-ring chronologies, we conducted correlation analyses between six annually resolved δ18O tree-ring cellulose (δ18OTC) chronologies and mean annual air package origins obtained from backward trajectory modeling. This novel approach has been tested for a transect at the southeastern Tibetan plateau (TP), where air masses with different isotopic composition overlap. Detailed examinations of daily precipitation amounts and monthly precipitation δ18O values (δ18OP ) were conducted with the ERA Interim and Laboratoire de M´et´eorologie Dynamique General Circulation Model (LMDZiso) data, respectively. Particularly the southernmost study sites are influenced by a distinct amount effect. Here, air package origin δ18OTC relations are generally weaker in contrast to our northern located study sites. We found that tree-ring isotope signatures at dry sites with less rain days per year tend tobe influenced stronger by air mass origin than tree-ringisotope values at semi-humid sites. That implies that the local hydroclimate history inferred from δ18OTC archives is better recorded at semi-humid sites.
Keywords: Tree-ring δ18O; Backward trajectory; Asian summer monsoon; Tibetan plateau

Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau - Wernicke, Jakob; Stark, Georg; Wang, Lily; Grießinger, Jussi; Bräuning, Achim (Annals of Botany, 2019)
BACKGROUND AND AIMS: Annually resolved biological climate proxies beyond the altitudinal and latitudinal distribution limit of trees are rare. In such regions, several studies have demonstrated that annual growth rings of dwarf shrubs are suitable proxies for palaeoclimatic investigations. In High Asia, the pioneer work of Liang et al. (Liang E, Lu X, Ren P, Li X, Zhu L, Eckstein D, 2012. Annual increments of juniper dwarf shrubs above the tree line on the central Tibetan Plateau: a useful climatic proxy. Annals of Botany109: 721-728) confirmed the suitability of shrub growth-ring chronologies for palaeoclimatic research. This study presents the first sensitivity study of an annually resolved δ18O time series inferred from Wilson juniper (Juniperus pingii var. wilsonii) from the northern shoreline of lake Nam Co (Tibetan Plateau). METHODS: Based on five individual dwarf shrub discs, a statistically reliable δ18O chronology covering the period 1957-2009 was achieved (expressed population signal = 0.80). Spearman's correlation analysis between the δ18O chronology and climate variables from different sources was applied. In a first step, the suitability of various climate data was evaluated. KEY RESULTS: Examinations of climate-proxy relationships revealed significant negative correlations between the δ18O shrub chronology and summer season moisture variability of the previous and current year. In particular, relative humidity of the previous and current vegetation period significantly determined the proxy variability (ρ = -0.48, P < 0.01). Furthermore, the δ18O variability of the developed shrub chronology significantly coincided with a nearby tree-ring δ18O chronology of the same genus (r = 0.62, P < 0.01). CONCLUSIONS: The δ18O shrub chronology reliably recorded humidity variations in the Nam Co region. The chronology was significantly correlated with a nearby moisture-sensitive tree-ring δ18O chronology, indicating a common climate signal in the two chronologies. This climate signal was likely determined by moisture variations of the Asian summer monsoon. Local climate effects were superimposed on the supra-regional climate signature of the monsoon circulation. Opposing δ18O values between the two chronologies were interpreted as plant-physiological differences during isotopic fractionation processes.
CRIS-Team Scopus Importer:2019-08-30
Keywords: Juniperus pingii var. wilsonii; climate–growth relations; dendrochronology; Tibetan Plateau; δ18O coherence shrub/tree

Aktive Filmarbeit im handlungsorientierten Geographieunterricht – Relevanz, Grundlagen, Möglichkeiten - Baumann, Christoph (Jenseits des Nürnberger Trichters – Ideen für einen zukunftsorientierten Geographieunterricht, 2012)

Albanese, Lara: Atlas des Weltalls : die Geheimnisse des Himmels und der Sterne. Zürich 2021 - Hübner, Thomas (2021)

Albrecht-Walzer, Birgit (u.a.): Fernwanderweg Fränkischer Gebirgsweg : vom Naturpark Frankenwald über das Fichtelgebirge und die Fränkische Schweiz in die Frankenalb. 2., vollst. überarb. Aufl. Rodingersdorf 2019 - Hübner, Thomas (2019)

Albrecht-Walzer, Birgit (u.a.): Frankenwald : die schönsten Touren im Frankenwald : mit 31 Frankenwald-Steigla. Rodingersdorf 2021 - Hübner, Thomas (2021)

Alles nur Wutbürger/Nimbies? Eine Analyse der jüngsten Konflikte zur Neuplanung von Stromtrassen in Bayern - Schmitt, Thomas; Hamacher, Jörn; Pflaum, Anna; Tilsner, Rena; Wolf, Mathias (Mitteilungen der Fränkischen Geographischen Gesellschaft Bd. 61/62, 2016)
Während über die ‚Energiewende‘ in Deutschland prinzipiell ein weitgehender Konsens zwischen relevanten gesellschaftlichen Gruppen gewahrt wird, brachen über die konkrete Ausgestaltung der Transformation der Energieversorgung zahlreiche Konflikte aus. Anfang 2014 entzündeten sich die Auseinandersetzungen um den Bau der sogenannten Süd-Ost-Passage, einer Hochspannungsgleichstrom-Übertragungsleitung, welche von Sachsen-Anhalt bis in die Region Augsburg verlaufen sollte. Insbesondere entlang des geplanten Trassenabschnitts in Franken entwickelten sich heftige Proteste. Der vorliegende Beitrag analysiert diese Auseinandersetzungen um die 2014 geplante Süd-Ost-Passage in Bayern. Er identifiziert die relevanten Akteursgruppen auf unterschiedlichen skalaren Ebenen und klassifiziert die zahlreichen, heterogenen Argumentationen, welche für und wider die Trasse angeführt werden. Im Kern setzt sich der Beitrag damit´auseinander, inwiefern zwei mediale bzw. wissenschaftliche Deutungsangebote zur Erklärung von lokalen und regionalen Konflikten um Infrastrukturvorhaben, nämlich das Nimby-Konzept und das Wutbürger-Konzept, zur Erklärung entsprechender Konflikte herangezogen oder umgekehrt zurückgewiesen werden müssen. Dazu wird in der konzeptionellen Hinführung des Beitrags der Stand der wissenschaftlichen Diskussion zu diesen Konzepten dargelegt.
Keywords: Energiewende; Stromtrassen; Planungskonflikte; Geographische Energieforschung; Geographische Konfliktforschung; Nimby; Wutbürger; Deutschland; Nordbayern; Protestforschung

Alles über Fernsehen, Video, Satellit / Volker Dittel ; Friedrich Manz. Köln 1989 - Hübner, Thomas (1990)

Alltagsmobilität und Erreichbarkeit als Faktoren für Teilhabechancen und Bleibeorientierung der Geflüchteten in ländlichen Regionen. - Mehl, Peter; Kordel, Stefan; Meschter, Diana; Schneider, Hanne; Spenger, David; Weidinger, Tobias (Geflüchtete in ländlichen Regionen Deutschlands, 2022)
Das Kapitel nimmt die Rolle von Alltagsmobilität in den Blick und bestätigt deren Stellenwert für die Teilhabe von Geflüchteten in ländlichen Regionen. Ein zentraler Faktor hierfür ist der Zugang zum motorisierten Individualverkehr. Geflüchtete nehmen dies wahr, passen sich den lokalen Mobilitätspraktiken an, entwickeln aber auch eigene Strategien im Umgang mit der bestehenden Mobi- litätssituation. Werden sie dabei von lokaler Politik und Zivilgesellschaft unter- stützt, kann das wesentlich dazu beigetragen, mobilitätsbedingte Exklusion zu verringern.
Keywords: Alltagsmobilität; Mobilitätspolitik; ÖPNV; Teilhabe; Geflüchtete; Ländliche Regionen

A low-cost and open-source approach for supraglacial debris thickness mapping using UAV-based infrared thermography - Messmer, Jérôme; Groos, Alexander Raphael (Cryosphere, 2024)
Debris-covered glaciers exist in many mountain ranges and play an important role in the regional water cycle. However, modelling the surface mass balance, runoff contribution and future evolution of debris-covered glaciers is fraught with uncertainty as accurate observations on small-scale variations in debris thickness and sub-debris ice melt rates are only available for a few locations worldwide. Here we describe a customised low-cost unoccupied aerial vehicle (UAV) for high-resolution thermal imaging of mountain glaciers and present a complete open-source pipeline that facilitates the generation of accurate surface temperature and debris thickness maps from radiometric images. First, a radiometric orthophoto is computed from individual radiometric UAV images using structure-from-motion and multi-view-stereo techniques. User-specific calibration and correction procedures can then be applied to the radiometric orthophoto to account for atmospheric and environmental influences that affect the radiometric measurement. The thermal orthophoto reveals distinct spatial variations in surface temperature across the surveyed debris-covered area. Finally, a high-resolution debris thickness map is derived from the corrected thermal orthophoto using an empirical or inverse surface energy balance model that relates surface temperature to debris thickness and is calibrated against in situ measurements. Our results from a small-scale experiment on the Kanderfirn (also known as Kander Neve) in the Swiss Alps show that the surface temperature and thickness of a relatively thin debris layer (ca. 0–15 cm) can be mapped with high accuracy using an empirical or physical model. On snow and ice surfaces, the mean deviation of the mapped surface temperature from the melting point (∼ 0 ∘C) was 0.6 ± 2.0 ∘C. The root-mean-square error of the modelled debris thickness was 1.3 cm. Through the detailed mapping, typical small-scale debris features and debris thickness patterns become visible, which are not spatially resolved by the thermal infrared sensors of current-generation satellites. The presented approach paves the way for comprehensive high-resolution supraglacial debris thickness mapping and opens up new opportunities for more accurate monitoring and modelling of debris-covered glacier

Alpen versus Anden – obere Waldgrenzen im Vergleich - Peters, Thorsten (Arbeitskreis Hochgebirge, 2015)

Altmühltal : im Reich des Archaeopteryx / Martin Röper ; Monika Rothgaenger. Wiebelsheim 2013 - Hübner, Thomas (2014)

Ambient Assisted Living in Arzberg - Neufeld, Markus; Chilla, Tobias (Chance! Demografischer Wandel vor Ort. Ideen, Konzepte, Beispiele, 2015)

AMD-HookNet for Glacier Front Segmentation - Wu, Fei; Gourmelon, Nora; Seehaus, Thorsten; Zhang, Jianlin; Braun, Matthias; Maier, Andreas; Christlein, Vincent (IEEE Transactions on Geoscience and Remote Sensing, 2023)
Knowledge on changes in glacier calving front positions is important for assessing the status of glaciers. Remote sensing imagery provides the ideal database for monitoring calving front positions; however, it is not feasible to perform this task manually for all calving glaciers globally due to time constraints. Deep-learning-based methods have shown great potential for glacier calving front delineation from optical and radar satellite imagery. The calving front is represented as a single thin line between the ocean and the glacier, which makes the task vulnerable to inaccurate predictions. The limited availability of annotated glacier imagery leads to a lack of data diversity (not all possible combinations of different weather conditions, terminus shapes, sensors, etc. are present in the data), which exacerbates the difficulty of accurate segmentation. In this article, we propose attention-multihooking-deep-supervision HookNet (AMD-HookNet), a novel glacier calving front segmentation framework for synthetic aperture radar (SAR) images. The proposed method aims to enhance the feature representation capability through multiple information interactions between low-resolution and high-resolution inputs based on a two-branch U-Net. The attention mechanism, integrated into the two branch U-Net, aims to interact between the corresponding coarse and fine-grained feature maps. This allows the network to automatically adjust feature relationships, resulting in accurate pixel classification predictions. Extensive experiments and comparisons on the challenging glacier segmentation benchmark dataset CaFFe show that our AMD-HookNet achieves a mean distance error (MDE) of 438 m to the ground truth outperforming the current state of the art by 42%, which validates its effectivenes

A mid-troposphere perspective on the East African climate paradox - Mölg, Thomas; Pickler, Carolyne (Environmental Research Letters, 2022)
The East African climate paradox—a term framing the observed precipitation decline in the March-May (MAM) wet season of East Africa from roughly 1980-2010, yet an increase in future climates simulated by global climate models (GCMs)—mostly relies on data representing sea level. Here we add a mid-troposphere perspective by combining in-situ meteorological measurements at ∼6000 m a.s.l. from Africa’s highest mountain summit and a carefully selected subset of GCMs through a machine-learning link. Temporal trends of the resultant six weather types do support a drier mountain climate in the recent past and a moister one in the course of the 21st century, and a key to understanding these contrasting trends materializes from the new dominance of changes in weather type frequency in the future climate. Importantly, however, the results also suggest that the trend reversal requires a strong external climate forcing. Hence, the forcing strength should be considered more systematically in forthcoming studies, to challenge the question whether equatorial East Africa’s MAM climate will indeed become wetter in all plausible future scenarios.
CRIS-Team Scopus Importer:2022-09-02
Keywords: climate projections; East Africa; tropical climate; wet season

A minimal model for wind- and mixing-driven overturning: threshold behavior for both driving mechanisms - Fürst, Johannes; Levermann, Anders (Climate Dynamics, 2012)
We present a minimal conceptual model for the Atlantic meridional overturning circulation which incorporates the advection of salinity and the basic dynamics of the oceanic pycnocline. Four tracer transport processes following Gnanadesikan in Science 283(5410):2077-2079, (1999) allow for a dynamical adjustment of the oceanic pycnocline which defines the vertical extent of a mid-latitudinal box. At the same time the model captures the salt-advection feedback (Stommel in Tellus 13(2):224-230, (1961)). Due to its simplicity the model can be solved analytically in the purely wind- and purely mixing-driven cases. We find the possibility of abrupt transition in response to surface freshwater forcing in both cases even though the circulations are very different in physics and geometry. This analytical approach also provides expressions for the critical freshwater input marking the change in the dynamics of the system. Our analysis shows that including the pycnocline dynamics in a salt-advection model causes a decrease in the freshwater sensitivity of its northern sinking up to a threshold at which the circulation breaks down. Compared to previous studies the model is restricted to the essential ingredients. Still, it exhibits a rich behavior which reaches beyond the scope of this study and might be used as a paradigm for the qualitative behaviour of the Atlantic overturning in the discussion of driving mechanisms.
Keywords: Meridional overturning circulation; Northern sinking; Critical freshwater threshold; Overturning sensitivity; Conceptual model; Stability; Atlantic meridional overturning circulation; Pycnocline depth; Driving mechanism

A multi-criteria evaluation model of earthquake vulnerability in Victoria, British Columbia - Walker, Blake; Taylor-Noonan, Cameron; Tabbernor, Alan; McKinnon, T'Brenn; Bal, Harsimran; Bradley, Dan; Schuurman, Nadine; Clague, John J. (Natural Hazards, 2014)
Keywords: Vulnerability; Disaster response; British Columbia; GIS; Earthquakes; Victoria; Risk

A multimethod approach for county-scale geospatial analysis of emerging infectious diseases: a cross-sectional case study of COVID-19 incidence in Germany - Scarpone, Christopher; Brinkmann, Sebastian T.; Große, Tim; Sonnenwald, Daniel; Fuchs, Martin; Walker, Blake (International Journal of Health Geographics, 2020)
BACKGROUND: As of 13 July 2020, 12.9 million COVID-19 cases have been reported worldwide. Prior studies have demonstrated that local socioeconomic and built environment characteristics may significantly contribute to viral transmission and incidence rates, thereby accounting for some of the spatial variation observed. Due to uncertainties, non-linearities, and multiple interaction effects observed in the associations between COVID-19 incidence and socioeconomic, infrastructural, and built environment characteristics, we present a structured multimethod approach for analysing cross-sectional incidence data within in an Exploratory Spatial Data Analysis (ESDA) framework at the NUTS3 (county) scale. METHODS: By sequentially conducting a geospatial analysis, an heuristic geographical interpretation, a Bayesian machine learning analysis, and parameterising a Generalised Additive Model (GAM), we assessed associations between incidence rates and 368 independent variables describing geographical patterns, socioeconomic risk factors, infrastructure, and features of the build environment. A spatial trend analysis and Local Indicators of Spatial Autocorrelation were used to characterise the geography of age-adjusted COVID-19 incidence rates across Germany, followed by iterative modelling using Bayesian Additive Regression Trees (BART) to identify and measure candidate explanatory variables. Partial dependence plots were derived to quantify and contextualise BART model results, followed by the parameterisation of a GAM to assess correlations. RESULTS: A strong south-to-north gradient of COVID-19 incidence was identified, facilitating an empirical classification of the study area into two epidemic subregions. All preliminary and final models indicated that location, densities of the built environment, and socioeconomic variables were important predictors of incidence rates in Germany. The top ten predictor variables' partial dependence exhibited multiple non-linearities in the relationships between key predictor variables and COVID-19 incidence rates. The BART, partial dependence, and GAM results indicate that the strongest predictors of COVID-19 incidence at the county scale were related to community interconnectedness, geographical location, transportation infrastructure, and labour market structure. CONCLUSIONS: The multimethod ESDA approach provided unique insights into spatial and aspatial non-stationarities of COVID-19 incidence in Germany. BART and GAM modelling indicated that geographical configuration, built environment densities, socioeconomic characteristics, and infrastructure all exhibit associations with COVID-19 incidence in Germany when assessed at the county scale. The results suggest that measures to implement social distancing and reduce unnecessary travel may be important methods for reducing contagion, and the authors call for further research to investigate the observed associations to inform prevention and control policy.
CRIS-Team Scopus Importer:2020-08-28
Keywords: Built environment; COVID-19; Exploratory Spatial Data Analysis (ESDA); GIS; Infectious disease; Machine learning; SARS-CoV-2; Socioeconomic status

Analyzing remotely sensed structural and chemical canopy traits of a forest invaded by Prunus serotina over multiple spatial scales. - Ewald, Michael; Skowronek, Sandra; Aerts, Raf; Dolos, Klara; Lenoir, Jonathan; Nicolas, Manuel; Warrie, Jens; Hattab, Tarek; Feilhauer, Hannes; Honnay, Olivier; Garzon-Lopez, Carol; Decocq, Guillaume; et al. (Biological Invasions, 2018)

An approach for the characterization of Neolithic soils by means of chemolytic techniques and 13C NMR spectroscopy - Bäumler, Rupert; et al. (Mitteilungen der Deutschen Bodenkundlichen Gesellschaft, 1999)
UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IG.profes_1.anappr

Andic properties in soils developed from non-volcanic materials in Central Bhutan - Bäumler, Rupert; et al. (Journal of Plant Nutrition and Soil Science, 2005)
UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IG.profes_1.andicp

A near 90-year record of the evolution of El Morado Glacier and its proglacial lake, Central Chilean Andes - Farías Barahona, David; Wilson, Ryan; Bravo, Claudio; Vivero, Sebastian; Caro, Alexis; Shaw, Thomas E.; Casassa, Gino; Ayala, Alvaro; Mejias, Alonso; Harrison, Stephan; Glasser, Neil F.; Mcphee, James; et al. (Journal of Glaciology, 2020)
Using an ensemble of close- and long-range remote sensing, lake bathymetry and regional meteorological data, we present a detailed assessment of the geometric changes of El Morado Glacier in the Central Andes of Chile and its adjacent proglacial lake between 1932 and 2019. Overall, the results revealed a period of marked glacier down wasting, with a mean geodetic glacier mass balance of -0.39 +/- 0.15 m w.e.a(-1)observed for the entire glacier between 1955 and 2015 with an area loss of 40% between 1955 and 2019. We estimate an ice elevation change of -1.00 +/- 0.17 m a(-1)for the glacier tongue between 1932 and 2019. The increase in the ice thinning rates and area loss during the last decade is coincident with the severe drought in this region (2010-present), which our minimal surface mass-balance model is able to reproduce. As a result of the glacier changes observed, the proglacial lake increased in area substantially between 1955 and 2019, with bathymetry data suggesting a water volume of 3.6 million m(3)in 2017. This study highlights the need for further monitoring of glacierised areas in the Central Andes. Such efforts would facilitate a better understanding of the downstream impacts of glacier downwasting.
CRIS-Team WoS Importer:2020-10-16

An ecological paradox: high species diversity and low position of the upper forest line in the Andean Depression - Peters, Thorsten; Bräuning, Achim; Münchow, Jannes; Richter, Michael (Ecology and Evolution, 2014)
Systematic investigations of the upper forest line (UFL) primarily concentrate on mid and high latitudes of the Northern Hemisphere, whereas studies of Neotropical UFLs are still fragmentary. This article outlines the extraordinary high tree diversity at the UFL within the Andean Depression and unravels the links between the comparatively low position of the local UFL, high tree-species diversity, and climate. On the basis of Gentry′s rapid inventory methodology for the tropics, vegetation sampling was conducted at 12 UFL sites, and local climate (temperature, wind, precipitation, and soil moisture) was investigated at six sites. Monotypic forests dominated by Polylepis were only found at the higher located margins of the Andean Depression while the lower situated core areas were characterized by a species-rich forest, which lacked the elsewhere dominant tree-species Polylepis. In total, a remarkably high tree-species number of 255 tree species of 40 different plant families was found. Beta-diversity was also high with more than two complete species turnovers. A non-linear relationship between the floristic similarity of the investigated study sites and elevation was detected. Temperatures at the investigated study sites clearly exceeded 5.5°C, the postulated threshold value for the upper tree growth limit in the tropics. Instead, quasi-permanent trade winds, high precipitation amounts, and high soil water contents affect the local position of the UFL in a negative way. Interestingly, most of the above-mentioned factors are also contributing to the high species richness. The result is a combination of a clearly marked upper forest line depression combined with an extraordinary forest line complexity, which was an almost unknown paradox.

A new approach to classification of 40 years of Antarctic sea ice concentration data - Wachter, Paul; Reiser, Fabian; Friedl, Peter; Jacobeit, Jucundus (International Journal of Climatology, 2020)
In this paper, we present a characterization of Antarctic sea ice based on the classification of annual sea ice concentration (SIC) data from 1979 to 2018. A clustering algorithm was applied to provide a climatological description of significant annual cycles of SIC and their spatial distribution around the Southern Ocean. Based on these classification results, we investigate the variability of SIC cycles on decadal and inter-annual time scales. First, we discuss significant spatial shifts of SIC cycles during 1979–1998 and 1999–2018. In the Weddell Sea and in large parts of the Ross Sea, we observed higher SIC during the summer season, and an extension of sea ice cover in winter compared to the long-term average. Second, we introduce the Climatological Sea Ice Anomaly Index (CSIAI), which is an annual measure for year-round sea ice anomalies of the Southern Ocean and its regional sub-sectors. By relating selected years of significant sea ice conditions (1981, 2007 and 2014) with atmospheric influences, we demonstrate that the CSIAI is very useful for assessing inter-annular Antarctic SIC variability. Positive and negative sea ice anomalies can be qualitatively explained by atmospheric circulation anomalies in the years 1981 and 2007. However, in 2014, the year with the largest observed sea ice extent in our time series, we found that this positive sea ice anomaly was surprisingly not associated with a stationary and inter-seasonally persistent pattern of circulation anomaly. This suggests that sub-seasonal to seasonal circulation anomalies and ocean-related processes favoured the formation of the sea ice maximum in 2014. With this study we provide additional information on the long-term annual SIC variability around Antarctica. Furthermore, our classification approach and its results have potential for application in the evaluation of sea ice model results.
CRIS-Team Scopus Importer:2020-10-30
Keywords: passive microwave data; sea ice climatology; sea ice trends; sea ice variability

A new, high-resolution climatological atmospheric dataset for southern New Zealand - Kropac, Elena; Mölg, Thomas; Cullen, Nicolas James (EGU General Assembly 2023, 2023)
The regional climate of New Zealand’s South Island is shaped by the interaction of the Southern Hemisphere westerlies with the complex orography of the Southern Alps. Due to the geographical setting of New Zealand in the south-west Pacific, the properties of the transported air masses and the regional circulation itself are strongly influenced by the surrounding oceans. Therefore, variations in sea surface temperature (SST) are reflected on a variety of spatial and temporal scales and are statistically detectable through to temperature anomalies and glacier mass balance changes in the high mountains of the Southern Alps. The relationship between SST and high-mountain climate has not yet been investigated from a process perspective, leaving the underlying physical mechanisms that transmit large-scale SST signals to local climate anomalies and glacier mass changes unknown. We used dynamical downscaling with the Weather Research and Forecasting (WRF) model laterally forced by ERA5 reanalysis data to produce a regional atmospheric modeling dataset for the South Island of New Zealand. The dataset covers the present-day, 16-year period of 2005 to 2020. The high horizontal resolution of 2 km ensures that high-mountain topography and glaciers are resolved realistically, and convection is modeled explicitly. The two-domain setup is centered on Brewster Glacier, a benchmark glacier close to the main divide of the Southern Alps, which is the focus of further process-oriented investigations. The model configuration has been optimized to provide both reasonable output and fast simulation time, allowing for expense-limited follow-up sensitivity experiments. The dataset is evaluated regionally against an extensive network of observational meteorological data from the National Institute of Water and Atmospheric Research (NIWA) and MetService New Zealand as well as against atmospheric water content from Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. Locally, the model output is compared to high-mountain weather station measurements at Brewster Glacier. The model represents variability in both atmospheric water content and near-surface meteorological conditions generally well, although there are both seasonal and spatial biases that are particularly confined to high elevations. The local climate at Brewster Glacier (where landuse and topographic conditions have been optimized) is remarkably well represented on both seasonal and daily timescales. Given the fact that the Southern Hemisphere has been understudied in terms of multiscale climate and cryosphere relations, the dataset provides a unique and valuable tool for investigations of climate change and related impacts in southern New Zealand with high interdisciplinary relevance. Data from the finest-resolution model domain are available for download at daily temporal resolution from a public repositor

A new satellite image map of King George Island (South Shetland Islands, Antarctica) - Braun, Matthias; et al. (Polarforschung, 2002)
UnivIS-Import:2015-04-20:Pub.2002.nat.dgeo.IG.pgfgis.anewsa

An hourly ground temperature dataset for 16 high-elevation sites (3493–4377 m a.s.l.) in the Bale Mountains, Ethiopia (2017–2020) - Groos, Alexander Raphael; Niederhauser, Janik; Lemma, Bruk; Fekadu, Mekbib; Zech, Wolfgang; Haensel, Falk; Wraase, Luise; Akçar, Naki; Veit, Heinz (Earth System Science Data, 2022)
Tropical mountains and highlands in Africa are under pressure because of anthropogenic climate and land-use change. To determine the impacts on the afro-alpine environment and to assess the potential socio-economic consequences, the monitoring of essential climate and environmental variables at high elevation is fundamental. However, long-term temperature observations on the African continent above 3000 m are very rare. Here we present a consistent multiannual dataset of hourly ground temperatures for the Bale Mountains in the southern Ethiopian Highlands, which comprise Africa's largest tropical alpine area. The dataset covers the period from January 2017 to January 2020. To characterise and continuously monitor the mountain climate and ecosystem of the Bale Mountains along an elevation gradient from 3493 to 4377 m, ground temperature data loggers have been installed at seven sites at 2 cm depth; at four sites at 10 cm depth; and at five sites at 2, 10, and 50 cm depth. The statistical analysis of the generated time series reveals that ground temperatures in the Bale Mountains are subject to large daily fluctuations of up to 40 ∘C and minor seasonal variations on the order of 5 to 10 ∘C. Besides incoming short-wave radiation, ground moisture, and clouds at night, slope orientation and the type of vegetation coverage seem to be the main factors controlling daily and seasonal ground temperature variations. On the central Sanetti Plateau above 3800–4000 m, the mean annual ground temperature ranges from 9 to 11 ∘C. However, nocturnal ground frost down to a depth of 5 cm occurs frequently during the dry season from November to February. At the five sites where ground temperature is measured at three depths, the monitoring will be continued to trace long-term changes. To promote the further use of the ground temperature dataset by the wider research community dealing with the climate and geo-ecology of tropical mountains in eastern Africa, it is made freely available via the open-access repository Zenodo: https://doi.org/10.5281/zenodo.6047457 (Groos et al., 2022).<br

An improved topographic database for King George Island - Compilation, Application and Outlook - Braun, Matthias; Simoes, Jefferson Cardia; Vogt, Steffen; Bremer, Ulisses Franz; Blindow, Norbert; Pfender, Marion; Saurer, Helmut; Aquino, Francisco Eliseu; Ferron, Francisco A. (Antarctic Science 13, 2001)
A new topographic database for King George Island, one of the most visited areas in Antarctica, is presented. Data from differential GPS surveys, gained during the summers 1997/98 and 1999/2000, were combined with up to date coastlines from a SPOT satellite image mosaic, and topographic information from maps as well as from the Antarctic Digital Database. A digital terrain model (DTM) was generated using ARC/ INFO GIS. From contour lines derived from the DTM and the satellite image mosaic a satellite image map was assembled. Extensive information on data accuracy, the database as well as on the criteria applied to select place names is given in the multilingual map. A lack of accurate topographic information in the eastern part of the island was identified. It was concluded that additional topographic surveying or radar interferometry should be conducted to improve the data quality in this area. In three case studies, the potential applications of the improved topographic database are demonstrated. The first two examples comprise the verification of glacier velocities and the study of glacier retreat from the various input data-sets as well as the use of the DTM for climatological modelling. The last case study focuses on the use of the new digital database as a basic GIS (Geographic Information System) layer for environmental monitoring and management on King George Island.
UnivIS-Import:2015-04-20:Pub.2001.nat.dgeo.IG.pgfgis.animpr
Keywords: Antarctic Peninsula; Digital Terrain Model; Environmental management; Geographic Information System; King George Island; Satellite image map

An introduction to ethnoecology and ethnobotany, theory and methods - Gerique-Zipfel, Andres (2006)
UnivIS-Import:2015-04-20:Pub.2008.nat.dgeo.IG.LGIPDH.sustai

Annual growth ring formation and growth rates of different tree functional types in a tropical mountain forest in Ethiopia - Bräuning, Achim; Krepkowski, Julia; Hiltner, Ulrike; Gebrekirstos, Aster (TRACE - Tree Rings in Archaeology, Climatology and Ecology, Vol. 12: Proceedings of the DENDROSYMPOSIUM 2013 Scientific Technical Report STR14/05, GFZ Potsdam, 2014)

Annual temperature history in Southwest Tibet during the last 400 years recorded by tree rings. - Yang, Bao; Kang, Xingcheng; Jingjing, Liu; Bräuning, Achim; Qin, Chun (International Journal of Climatology, 2010)
We present a tree ring-width record from the southern Tibetan Plateau (TP) which spans from 1612-1998 AD (387 years). The series was developed from Tibetan juniper (Juniperus tibetica Kom) growing at sites near the western distribution limit of the species. Two versions of the chronology, a traditionally standardized chronology (TSC) and a regional curve standardization (RCS)chronology were developed. Linear regression models between ring width and mean annual temperature account for 41% (TSC) and 43% (RCS) of the annual (July-June) temperature variance for the period 1957-1998. According to the TSC reconstruction, warm periods occurred during the 1620s, 1650-1675, 1720s, 1740-1790, 1810s, 1850s-1890s, 1935-1950, and 1957-1964 and since 1980. Cold conditions prevailed during the 1630s-1640s, 1680s-1710s, 1730s, 1820-1840s, 1900s-1920s and the 1970s. Within the last 400 years, the late-20 century warming is distinctive but still within the range of natural climatic variability of this region. Comparison of our TSC reconstruction with proxy temperature records from other parts of the TP shows that the cold conditions during the 1730s, 1900s-1920s, and 1970s, and the warm periods during the 1770-1800, 1850s-1890s, 1935-1950, and 1957-1964 and since 1980 were synchronously occurring broad-scale climate anomalies on the whole TP. Differences between the reconstructions are found during the 17 century and around 1760, which were probably caused by local differences in temperature change and different sensitivity in seasonality. The RCS series portrays low-frequency variations such as warm periods during 1620-1640, 1650-1690, 1715-1790, and 1845-1875, and cold conditions during 1640-1650, 1690-1715, and 1875-1995. These long-term trends need to be verified by developing other proxy records that target to capture low-frequency signals in the future.
Keywords: Annual temperature reconstruction; Climate change; Last 400 years; Tibetan plateau; Tree-ring width

Annual temperature reconstruction in the Central Hengduan Mountains, China, as deduced from tree rings - Fan, Ze-Xin; Bräuning, Achim; Cao, Kun-Fang (Dendrochronologia, 2008)
We developed five tree ring-width chronologies from one fir (Abies georgei) and four spruce (Picea brachytyla) stands near the upper treeline in the central Hengduan Mountain, northwestern Yunnan, China. Similar growth patterns and significant correlations are embodied among the five chronologies. A principal component analysis for the four spruce chronologies indicated that the first component accounts for 54.8% of the total variance over the period 1750-2003. Climate-growth response analysis revealed that radial growth is mainly controlled by temperature variations, especially in the winter season. The first principal component of the spruce chronology network accounts for 43% of the annual mean temperature (from previous October until September) variance during the common period 1959-2003. By using a linear regression approach, we reconstructed annual mean temperature for the past 250 years. The reconstruction shows that the central Hengduan Mountain experienced some cool episodes during the 1810s, 1860s, and during 1960-1980. Warm intervals occurred during the 1780s, 1850s, 1940-1960 and in the past two decades. These general patterns are in general accordance with other records from nearby regions.
UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IG.LGIPDT.annual
Keywords: Dendroclimatology; Hengduan Mountain; Ring-width; Temperature

An object-based speckle filter using multi-sensor remote sensing imagery - Braun, Matthias; et al. (IEEE Geoscience and Remote Sensing Letters, 2007)
UnivIS-Import:2015-04-20:Pub.2007.nat.dgeo.IG.pgfgis.anobje

A nonlinear model coupling rockfall and rainfall intensity based on a four year measurement in a high Alpine rock wall (Reintal, German Alps) - Krautblatter, Michael; Moser, Michael (Natural Hazards and Earth System Sciences, 2009)

A novel framework to investigate wind-driven snow redistribution over an Alpine glacier: combination of high-resolution terrestrial laser scans and large-eddy simulations - Voordendag, Annelies; Goger, Brigitta; Prinz, Rainer; Sauter, Tobias; Mölg, Thomas; Saigger, Manuel; Kaser, Georg (Cryosphere, 2024)
Wind-driven snow redistribution affects the glacier mass balance by eroding or depositing mass from or to different parts of the glacier's surface. High-resolution observations are used to test the ability of large-eddy simulations as a tool for distributed mass balance modeling. We present a case study of observed and simulated snow redistribution over Hintereisferner glacier (Ötztal Alps, Austria) between 6 and 9 February 2021. Observations consist of three high-resolution digital elevation models (ΔxCombining double low line1m) derived from terrestrial laser scans taken shortly before, directly after, and 15h after snowfall. The scans are complemented by datasets from three on-site weather stations. After the snowfall event, we observed a snowpack decrease of 0.08m on average over the glacier. The decrease in the snow depth can be attributed to post-snowfall compaction and the wind-driven redistribution of snow. Simulations were performed with the Weather Research and Forecasting (WRF) model at ΔxCombining double low line48m with a newly implemented snow drift module. The spatial patterns of the simulated snow redistribution agree well with the observed generalized patterns. Snow redistribution contributed -0.026m to the surface elevation decrease over the glacier surface on 8 February, resulting in a mass loss of -3.9kgm-2, which is on the same order of magnitude as the observations. With the single case study we cannot yet extrapolate the impact of post-snowfall events on the seasonal glacier mass balance, but the study shows that the snow drift module in WRF is a powerful tool to improve knowledge on wind-driven snow redistribution patterns over glaciers.
CRIS-Team Scopus Importer:2024-03-15

Anruf genügt! : So funktioniert das Telefon / Tom & David Smith. Luzern 1993 - Hübner, Thomas (1994)

Anti-semitism in early 20th century German geography. From a “spaceless” people to the root of the “ills” of urbanization - Michel, Boris (Political Geography, 2018)

Antisemitismus, Großstadtfeindlichkeit und reaktionäre Kapitalismuskritik in der deutschsprachigen Geographie vor 1945 - Michel, Boris (Geographica Helvetica, 2014)

An updated multi-temporal glacier inventory for the Patagonian Andes with changes between the Little Ice Age and 2016 - Meier, Wolfgang; Grießinger, Jussi; Hochreuther, Philipp; Braun, Matthias (Frontiers in Earth Science, 2018)
Keywords: Glacier change; Little Ice Age; Glacier mapping; South America; Remote sensing

Anwendungsreif? Nutzung und Potenzial von digitalen Geodaten für Stadtforschung und Raumbeobachtung am Fallbeispiel OpenStreetMap - Plennert, Matthias (Stadtforschung und Statistik, 2016)

Anwerben, Einarbeiten, Halten von Drittstaatsangehörigen im Gesundheits- und Pflegesektor im Landkreis Neustadt a.d.Aisch-Bad Windsheim. - Kordel, Stefan; Weidinger, Tobias; Spenger, David (2022)

Anwerben, Einarbeiten, Halten von Drittstaatsangehörigen in der Hotellerie und Gastronomie im Berchtesgadener Land & Landkreis Bernkastel-Wittlich - Kordel, Stefan; Weidinger, Tobias; Spenger, David (2022)
Im Rahmen einer lokalen Fallstudie in Bayern wurde im EU-H2020 Projekt MATILDE die nachhaltige Beschäftigung von Personen aus Drittstaaten in ländlichen Räumen untersucht. Betrachtet wurden die Phasen des Anwerbens, der Einarbeitung und des Haltens am Beispiel der Hotellerie und Gastronomie im Berchtesgadener Land (BGL). Mithilfe eines partizipationsorientierten und multiperspektivischen Forschungsansatzes wurden Unternehmen, regionale Akteure sowie die Neuzugewanderten selbst einbezogen. Der Bericht skizziert die wichtigsten Maßnahmen in den drei Phasen und legt Handlungsoptionen dar. Zudem werden diese Ergebnisse durch Erfahrungen eines good practice-Beispiels im Landkreis Bernkastel-Wittlich (BKW) in Rheinland-Pfalz angereichert, das im Rahmen des Programms „Land.Zuhause.Zukunft – Integration und Teilhabe von Neuzuwanderern in ländlichen Räumen“ der Robert Bosch Stiftung GmbH finanziert und in Zusammenarbeit mit Kompetus Management Consulting GmbH zwischen 2020 und 2022 umgesetzt wurd

Any Portal in a Storm? Collaborative and crowdsourced maps in response to Typhoon Yolanda/Haiyan, Philippines - Turk, Catherine (Journal of Contingencies and Crisis Management, 2020)
The promises of crowdsourcing volunteered geographic information (VGI) for providing timely information about crises were recognized at least a decade ago. While cartographers and developers hone the accuracy of maps and data, social scientists critique these technologies through various theoretical lenses: in terms of knowledge politics of digital humanitarianism; as tools of neoliberal governance; and as examples of datification supporting automated or remote government. Amidst all these claims, it is time to return to the maps themselves, as empirical examples, considering the information they actually provide. This paper examines crowdsourced and collaborative maps from late 2013 following Typhoon Yolanda/Haiyan in the Philippines. Various humanitarian, mapping, and media organizations produced maps in response to the typhoon. Close qualitative analysis of map content queries what these maps reveal about the disaster and whether the maps really produce the information that proponents claim. Analysis of data curated in each map reveals that much of the situational information being mapped is already available elsewhere and that few new ground truths have emerged through these projects. By demonstrating the limitations of the information mediated in these maps, the findings have practical and policy implications for disaster practitioners and digital volunteers intending to help disaster response.
CRIS-Team Scopus Importer:2020-11-06
Keywords: critical cartography; crowdsourcing; digital humanitarians; disaster response; volunteered geographic information

A one-million-year isotope record from siderites formed in modern ferruginous sediments - Vuillemin, Aurèle; Mayr, Christoph; Schuessler, Jan A.; Friese, André; Bauer, Kohen W.; Lücke, Andreas; Heuer, Verena B.; Glombitza, Clemens; Henny, Cynthia; von Blanckenburg, Friedhelm; Russell, James M.; Bijaksana, Satria; et al. (Geological Society of America Bulletin, 2023)
Ancient iron formations hold important records of environmental conditions during the Precambrian eons. Reconstructions of past oceanic systems require investigation of modern ferruginous analogs to disentangle water column and diagenetic signals recorded in iron-bearing minerals. We analyzed oxygen, iron, and carbon isotopes in siderite, a ferrous carbonate phase commonly used as an environmental proxy, from a 100-m-long record spanning a 1 Ma depositional history in ferruginous Lake Towuti, Indonesia. Combining bulk sediment and pore water geochemistry, we traced processes controlling siderite isotope signatures. We show that siderite oxygen isotope compositions (δ18O) reflect in-lake hydrological and depositional conditions. Low iron isotope values (δ56Fe) record water column oxygenation events over geological timescales, with minor diagenetic partitioning of Fe isotopes by microbial iron reduction after deposition. The carbon isotope compositions (δ13C) reflect the incorporation of biogenic HCO3 –, which is consistent with sediment organic matter remineralization lasting over ca. 200 ka after burial. Positive δ13C excursions indicate an increased production of biogenic methane that escaped the sediment during low lake levels. Diffusion across the sediment–water interface during initial formation of siderites tends to align the isotope signatures of bottom waters to those of pore waters. As microbial reduction of ferric iron and oxidation of organic matter proceed and saturate pore water conditions with respect to siderite, overgrowth on nuclei partially mutes the environmental signal inherited from past bottom waters over ca. 1 Ma. Because high depositional fluxes of ferric iron and organic matter in early oceans would have promoted similar microbial processes in ferruginous deposits prior to lithification, the environmental record contained in siderite grains can successively integrate depositional and early diagenetic signals over short geological timescales.
CRIS-Team Scopus Importer:2023-03-24

Application of a two-step approach for mapping ice thickness to various glacier types on Svalbard - Fürst, Johannes; Gillet-Chaulet, Fabien; Benham, Toby; Dowdeswell, Julian; Grabiec, Mariusz; Navarro, Francisco J.; Pettersson, Rickard; Moholdt, Geir; Nuth, Christopher; Saß, Björn; Aas, Kjetil; Fettweis, Xavier; et al. (Cryosphere, 2017)
The basal topography is largely unknown beneath most glaciers and ice caps, and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we present a two-step reconstruction approach for ice thickness that solves mass conservation over single or several connected drainage basins. The approach is applied to a variety of test geometries with abundant thickness measurements including marine- and land-terminating glaciers as well as a 2400 km2 ice cap on Svalbard. The input requirements are kept to a minimum for the first step. In this step, a geometrically controlled, non-local flux solution is converted into thickness values relying on the shallow ice approximation (SIA). In a second step, the thickness field is updated along fast-flowing glacier trunks on the basis of velocity observations. Both steps account for available thickness measurements. Each thickness field is presented together with an error-estimate map based on a formal propagation of input uncertainties. These error estimates point out that the thickness field is least constrained near ice divides or in other stagnant areas. Withholding a share of the thickness measurements, error estimates tend to overestimate mismatch values in a median sense. We also have to accept an aggregate uncertainty of at least 25 % in the reconstructed thickness field for glaciers with very sparse or no observations. For Vestfonna ice cap (VIC), a previous ice volume estimate based on the same measurement record as used here has to be corrected upward by 22 %. We also find that a 13 % area fraction of the ice cap is in fact grounded below sea level. The former 5 % estimate from a direct measurement interpolation exceeds an aggregate maximum range of 6–23 % as inferred from the error estimates here.

Appropriate housing in rural and mountain areas? Current structures and practices of access for immigrants. The example of Alpine regions in Austria and Germany - Kordel, Stefan; Weidinger, Tobias; Machold, Ingrid; Gruber, Marika (Assessing the Social Impact of Immigration in Europe. Renegotiating remoteness, 2023)
Housing is commonly discussed as an important dimension of the social inclusion and integration of immigrants, but also as a prerequisite for staying. While challenges in urban contexts mostly affect shortages, the picture is more diverse in rural and mountain areas, including abandoned housing and vacancies, the scarce availability of rental apartments, and overpriced accommodation in light of the preference for profitable second homes or high tourism intensity. This chapter discusses the situation in three Alpine regions in Austria and Germany with diverse housing market structures. The results suggest that although housing policies differ considerably between regions, key actors must consider the changing needs of labour migrants and refugees for appropriate housing. Especially in a rural environment, aspirations to keep an apartment and improve one’s living conditions must be supported by NGOs or private actors.<br
CRIS-Team Scopus Importer:2023-07-28
Keywords: Housing; Immigration; Vacancies; Second homes; Exclusion; Governance

A qualitative framework for evaluating participation on the Geoweb - Walker, Blake; Rinner, Claus (URISA Journal, 2013)
The participatory Geoweb emerges from the synthesis of map-based online applications and Web 2.0 concepts such as user-generated content, enhanced interactivity, and cloud computing. The result is a wide range of tools and projects using these tools to communicate, collaborate, deliberate, and inform spatial decision making. This article draws upon the literature in participatory geographic information systems to propose the “3E Framework,” which provides both a structured conceptual model and a practical tool for the evaluation of projects on the participatory Geoweb. The framework deconstructs participation on the Geoweb into the provider and public realms and represents the engagement, empowerment, and enactment processes. It includes 20 evaluation questions that are derived from themes in the literature.<br

Arab Gulf Monarchies as an Epistemic (Online) Community Revisited. Diffusion, Competition, and Survival in the Aftermath of the Arab Uprisings. - Schuhn, Laura (Taiwan Journal of Democracy, 2021)
By 2017 at the latest, with that year’s blockade of Qatar driven by the Saudi, Bahraini, Egyptian, and Emirati leaderships, the fragility of the concept of an epistemic community of Arab monarchies, as described by Sean Yom in 2014 in this journal, has come to the fore. In this light, this essay advocates a shift in this concept toward a different type of “discursive formation,” which may advance our understanding of authoritarian clustering in the context of this debate. Taking Twitter as a proxy for an epistemic (online) community, this study analyzes the activities of Gulf elites on the site between 2017 and 2020 and identifies a significant subcluster within the Gulf Cooperation Council (GCC) states consisting of Saudi, Bahraini, and Emirati accounts. Given the context of day-to-day politics, this finding may not surprise us; however, this work suggests that it is not the mere existence of epistemic links resulting from cultural, historical, economic, or structural ties, but rather a convergence in content that drives authoritarian cooperation and the diffusion of legitimation strategies and norms of autocratic practic
Keywords: Authoritarian clustering; authoritarianism; diffusion; GCC; Middle East; monarchies; Twitter

A regional assessment of the deglaciation history of the Swiss Plateau based on newly obtained and re-evaluated Be-10 cosmic-ray exposure ages - Hofmann, Felix Martin; Groos, Alexander Raphael; Garcia Morabito, Ezequiel; Struck, Julian; Gnägi, Christian; Scharf, Andreas; Rugel, Georg; Merchel, Silke; Zech, Roland (Quaternary Science Advances, 2023)
During marine oxygen isotope stage (MIS) 2, the Swiss Plateau temporarily hosted large piedmont lobe glaciers that retreated after their maximum advance back to the fringe of the Alps. The presence of moraines in this region indicates that overall glacier recession was punctuated by repeated phases of ice-marginal stability and re-advances. The timing of these events in the region formerly covered by the eastern lobe of the Rhône (or Valais) glacier has been controversial and remains poorly constrained due to the lack of chronological data. To fill this gap, 10 Be cosmic-ray exposure (CRE) dating was applied to erratic boulders inside the assumed MIS 2 maximum extent of this piedmont lobe. An erratic boulder at an ice-marginal position upstream from the suspected MIS 2 maximum extent gave an age of about 19 ka. Erratic boulders at a presumably younger ice-marginal position (Brästenberg position) yielded an average age of ca. 20 ka. However, several erratic boulders beyond the Brästenberg position gave internally consistent, but stratigraphically too young ages of ca. 17 ka. We cannot rule out that glacier recession from the Brästenberg position began no later than 17 ka. CRE dating of a moraine of a presumably younger ice-marginal position (Solothurn position) gave unrealistically old ages and an incredibly young age (86 ka, 40 ka, and 4 ka). Carbon-14 CRE dating should be applied to provide additional information on the last deglaciation of the Swiss Plateau. Nevertheless, despite outlying ages, the presented chronological data contribute to an overall consistent and increasingly refined chronology of the last deglaciation of the Swiss Plateau when compared with 59 previously published CRE ages.<br
Keywords: Terrestrial in situ cosmogenic nuclides; Exposure dating; Moraine; Erratic boulder; Swiss Plateau; Deglaciation; Glacier fluctuations

Are Large Suburban Housing Estates Urban Threats? - Germes, Melina; Schirmel, Henning; Brailich, Adam; Glasze, Georg; Pütz, Robert (Annales de Geographie, 2010)
Since the 1960s, large housing estates have shaped the physiognomy of suburbia in Western and Eastern European cities. This paper examines the constitution of meaning of this particular form of housing estate within three different national contexts (Germany, Poland, and France). We identify transnational and specific national discursive patterns that produce both particular social spaces and distinct social orders. A research design in discourse theory allows focusing on social phenomena in their specific context and thus serves as the appropriate frame of reference for such an international comparative study. We assume that the interlinkage of spatial (here/there) and social demarcations (familiar/foreign or safe/unsafe) is constitutive for the discursive production of spaces and social structures. Empirically, we base our study on major national newspapers. Combining corpus linguistic, lexicometric analysis with the analysis of articulation patterns, this paper explores differences and similarities, and ruptures in the discursive constitution of large housing estates. © Armand Coli
Keywords: Discourse theory; Large housing estates; Lexicometry; Security; Suburbia; Urban geography

Arenas of Volunteering: Experiences, Practices and Conflicts of Voluntary Refugee Relief - Hoppe-Seyler, Annika (Geographies of Asylum in Europe and the Role of European Localities, 2020)
CRIS-Team WoS Importer:2020-10-16

Arenz, Helwig (u.a.): Fahrrad fahren an Flüssen in Franken : 14 Genusstouren. Cadolzburg 2018 - Hübner, Thomas (2018)

Arenz, Sigrun: Ausflüge mit Hunden in Mittelfranken / Sigrun Arenz ; Anna Schwarm. Cadolzburg 2019 - Hübner, Thomas (2019)

Are pooled tree ring δ13C and δ18O series reliable climate archives? — A case study of Pinus nigra spp. laricio (Corsica/France). - Szymczak, Sonja; Joachimski, Michael; Bräuning, Achim; Hetzer, Timo; Kuhlemann, Joachim (Chemical Geology, 2012)
Stable carbon and oxygen isotopes in tree rings are considered as reliable climate archives as they provide past environmental information with high resolution. However, recent studies have shown that isotope chronologies may reveal a long-term age trend and be influenced by non-climatic factors as other tree-ring parameters as well. These trends can only be identified in chronologies measured on individual trees but not on pooled sample chronologies consisting of several trees. In order to test whether pooled chronologies from pine trees from the Island of Corsica (Mediterranean/France) can be used for climatic reconstructions, we compared calculated mean values from 5 individual trees with pooled chronologies from the same 5 individuals. Carbon and oxygen isotope chronologies for a 50-year interval with annual resolution and 400 years with decadal resolution were analysed in order to document secular changes in inter-tree variability and to test for age related trends in the isotope ratios. Pooled carbon and oxygen isotope series correspond well to chronologies based on mean values calculated from analyses of individual trees. Inter-tree variability in oxygen isotope ratios is higher than in carbon isotope ratios but remains relatively constant over time. Similarities between the isotope series of individual trees are stronger over the 400-year time scale documenting a common long-term signal in the isotope values. No long-term age related trends are observed. Oxygen isotope values of the juvenile phase are characterised by a remarkable decrease over 40–50 years, interpreted to be related to the less developed root system of the young trees. This age effect can be avoided by not considering the first 50 years from the chronologies. Our results confirm that pooled carbon and oxygen isotope chronologies from Pinus nigra can be used for environmental reconstructions without statistical detrending.
UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LG.arepoo
Keywords: Tree rings; Carbon isotopes; Oxygen isotopes; Pooling; Age trend; Pinus nigra ssp. laricio

Are remotely-sensed traits suitable for ecological analysis? A case study of long-term drought effects on Leaf Mass per Area of wetland vegetation - Feilhauer, Hannes; Schmid, Thomas; Faude, Ulrike; Sanchez-Carillo, Salvador; Cirujano, Santos (Ecological Indicators, 2018)

A research framework for projecting ecosystem change in highly diverse tropical mountain ecosystems - Bendix, Jörg; Aguire, Nicolay; Beck, Erwin; Bräuning, Achim; Brandl, Roland; Breuer, Lutz; Böhning-Gaese, Katrin; de Paula, Mateus Dantas; Hickler, Thomas; Homeier, Jürgen; Inclan, Diego; Leuschner, Christoph; et al. (Oecologia, 2021)
Tropical mountain ecosystems are threatened by climate and land-use changes. Their diversity and complexity make projections how they respond to environmental changes challenging. A suitable way are trait-based approaches, by distinguishing between response traits that determine the resistance of species to environmental changes and effect traits that are relevant for species' interactions, biotic processes, and ecosystem functions. The combination of those approaches with land surface models (LSM) linking the functional community composition to ecosystem functions provides new ways to project the response of ecosystems to environmental changes. With the interdisciplinary project RESPECT, we propose a research framework that uses a trait-based response-effect-framework (REF) to quantify relationships between abiotic conditions, the diversity of functional traits in communities, and associated biotic processes, informing a biodiversity-LSM. We apply the framework to a megadiverse tropical mountain forest. We use a plot design along an elevation and a land-use gradient to collect data on abiotic drivers, functional traits, and biotic processes. We integrate these data to build the biodiversity-LSM and illustrate how to test the model. REF results show that aboveground biomass production is not directly related to changing climatic conditions, but indirectly through associated changes in functional traits. Herbivory is directly related to changing abiotic conditions. The biodiversity-LSM informed by local functional trait and soil data improved the simulation of biomass production substantially. We conclude that local data, also derived from previous projects (platform Ecuador), are key elements of the research framework. We specify essential datasets to apply this framework to other mountain ecosystems.
CRIS-Team Scopus Importer:2021-02-05
Keywords: Biodiversity-land surface model; Functional traits; High mountains; Research framework; Response-effect-framework

ARGE ALP - Eine starke Region trotz oder wegen der Berge? - Chilla, Tobias; Lambracht, Markus (Von der "Revolution der Provinzen" zur Zukunft des Alpenraumes, Festschrift 50 Jahre ARGE ALP 1972-2022, 2022)

Armed conflict and cross-border asymmetries in urban development: A contextualized spatial analysis of Goma, Democratic Republic of the Congo and Gisenyi, Rwanda - Pech, Lisa; Levers, Christian; Büscher, Karen; Walker, Blake (Land Use Policy, 2021)
Armed conflicts often cause significant structural disturbance and modification to urban areas. These manifest as changes to the built environment either through destruction and diminution of built area or through an increase in extent and the number of buildings. The magnitude of conflict-induced displacement and migration are dependent upon a range of socio-political factors, resulting in variabilities in conflict-induced urban growth. Border cities provide a valuable setting to compare these variations, as they share geographical and cultural similarities, enabling comparative analysis of the conditions leading to divergent trajectories. This study examines the effects of armed inter- and intra-state conflict on urban spatial development both within and across national borders, focusing on the proximal cities of Goma, Democratic Republic of the Congo (DRC) and Gisenyi, Rwanda, between 1989 and 2014 (due to the availability of cloud-free satellite imagery). We conducted a visual analysis of high- to very high-resolution satellite imagery to map spatial development (both urban extent and individual buildings) for both cities. Based on this analysis, we then conducted site visits and interviews, through which underlying drivers of urban development pathways were identified and initial steps were made to disentangle conflict- and non-conflict drivers, as not all urban changes and differences are related to the presence or absence of armed conflict. These are situated in different phases of armed conflict in the region, the governance of their repercussions (or lack thereof), and the complex interdependencies between the two cities. Our analysis revealed remarkable differences in spatial development and urban morphology. While Goma’s urban area expands and densifies, Gisenyi's spatial extent remains relatively stable. Stakeholders on the ground identified armed conflict, linked population flows including internal and cross-border forced displacements, as well as differences in handling conflict-repercussions between the states as underlying drivers of the observed spatial changes. This study thus provides detailed evidence on the processes and drivers implicit in urban development and change in cross-border cities, their similarities, differences, and interdependencies, with a particular focus on armed conflicts’ domestic and cross-border effects.
Keywords: Sub-Sahara Africa; Cross-border cities; Urban development; Armed conflict; Satellite Imagery Analysis; Field research; Democratic Republic of the Congo; Rwanda

ARPAF Project CrossBorder - Cross-border mobility in the Alpine Region WP 2: Analysis of existing cross-border mobility networks - Chilla, Tobias; Heugel, Anna (2018)

Arsenic release and speciation in a degraded fen as affected by soil redox potential at varied moisture regime - Bäumler, Rupert; Weigand, Harald; Mansfeldt, Tim; Schneckenburger, D.; Wesselbothe, S.; Marb, C. (Geoderma, 2010)
Soil surveys have demonstrated arsenic (As) contents of up to 1600mgkg in surface horizons of degraded fens in the Bavarian Molasse basin, Germany. Ground water from the Tertiary aquifer seems to be the primary source of As. Yet, the cause of its accumulation in the topsoil is unclear. Focussing the influence of redox processes on As redistribution, we conducted soil column experiments with the A (716mg Askg), Ag (293mg Askg) and 2Ag (37mg Askg) horizons of a Mollic Gleysol (pH 7.2). The fixed beds were equipped with redox electrodes and suction cups and subjected to a saturation-drainage-saturation cycle. Water table fluctuations were simulated by defined pressure heads applied to the lower column boundaries via a digitally controlled vacuum system. After water saturation, the redox potential (E) dropped to minimum values of around 0mV in the A/Ag and-400mV in the 2Ag horizon. Soil drainage resulted in a quick return to oxidising conditions. Both in the A and Ag horizons total aqueous As concentrations were low (up to 20μgl) and not related to E. In contrast, aqueous As concentrations of the 2Ag horizon were between 5 and 140μgl and increased as the E decreased. However, the As species distribution showed no clear trend with E since both As(III) and As(V) were detected under reducing conditions. High release of As in the 2Ag horizon is consistent with low contents in Fe (hydr)oxides. In the A and Ag horizons, pedogenetic enrichment of sesquioxides contributes to a comparably lower sensitivity of E to water saturation and favours As retention. Thereby, As released under saturated conditions in the 2Ag horizon may be stabilised in the topsoil following capillary rise. Thus, surface horizons may act both as historic and as recent sinks for geogenic As at the site. © 2010 Elsevier B.V.
Keywords: Arsenic release; As (III); As (V); Column experiments; Gleysols; Soil-groundwater interactions

Asbach, Jeannie: Mittelfranken mit Kindern erleben. Bamberg 2022 - Hübner, Thomas (2022)

A Self-Trained Model for Cloud, Shadow and Snow Detection in Sentinel-2 Images of Snow- and Ice-Covered Regions - Nambiar, Kamal Gopikrishnan; Morgenshtern, Veniamin; Hochreuther, Philipp; Seehaus, Thorsten; Braun, Matthias (Remote Sensing, 2022)
Screening clouds, shadows, and snow is a critical pre-processing step in many remote-sensing data processing pipelines that operate on satellite image data from polar and high mountain regions. We observe that the results of the state-of-the-art Fmask algorithm are not very accurate in polar and high mountain regions. Given the unavailability of large, labeled Sentinel-2 training datasets, we present a multi-stage self-training approach that trains a model to perform semantic segmentation on Sentinel-2 L1C images using the noisy Fmask labels for training and a small human-labeled dataset for validation. At each stage of the proposed iterative framework, we use a larger network architecture in comparison to the previous stage and train a new model. The trained model at each stage is then used to generate new training labels for a bigger dataset, which are used for training the model in the next stage. We select the best model during training in each stage by evaluating the multi-class segmentation metric, mean Intersection over Union (mIoU), on the small human-labeled validation dataset. This effectively helps to correct the noisy labels. Our model achieved an overall accuracy of 93% compared to the Fmask 4 and Sen2Cor 2.8, which achieved 75% and 76%, respectively. We believe our approach can also be adapted for other remote-sensing applications for training deep-learning models with imprecise labels.<br
Keywords: deep learning; semi-supervised learning; semantic segmentation; self-training; automatic cloud screening; Fmask; Sentinel-2 imagery

A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring δ18O and its linkages to tropical oceans. - Liu, Xiaohong; Xu, Guobao; Grießinger, Jussi; An, Wenling; Wang, Wenzhi; Zeng, Xioamin; Wu, Guoju; Qin, Dahe (Quaternary Science Reviews, 2014)
We studied the climatic significance and potential forcing of regional tree-ring δ18O across the southeastern Tibetan Plateau from 1600 to 2009. Three normalized tree-ring δ18O time series showed high signal coherence at both low and high frequencies. A 400 years composite tree-ring δ18O chronology in southeastern Tibetan Plateau was established by averaging Z-score method. The composite δ18O chronology showed that climate changed since 1860, causing a shift in the hydroclimatic regime and in the influence of regional atmospheric circulation. Spatial correlation analysis revealed that tree-ring δ18O was significantly negatively correlated with moisture conditions, and especially with cloud cover during wet summers; the strongest correlation was found for the June to August period. Our regional cloud cover reconstruction for June-August period between 26°N and 34°N and between 89°E and 103°E explained 37.6% of the variation from 1953 to 2009. The climate conditions from 1600 to 1860 (the Little Ice Age) were cold and cloudy, but thereafter became sunnier and warmer. Hydroclimatic variations in this region are primarily affected by atmospheric processes in the tropical Indian Ocean and in the East Pacific Ocean, linked to the El Niño-Southern Oscillation (ENSO). The cloud cover over the southeastern Tibetan Plateau is modulated more strongly by sea surface temperatures in the Indian Ocean than over the Pacific Ocean, suggesting low-frequency responses to anomalous ocean warming. The impact of ENSO on regional tree-ring δ18O series was temporally unstable. Our comparisons among different proxies highlight that a tree-ring δ18O network has great potential to reveal common low-frequency climatic signals in monsoon Asia over long time scales.
Keywords: Asian monsoon; ENSO; Hydroclimate; Sea surface temperature; Southeastern Tibetan Plateau; Tree-ring δ18O

Assessing floristic composition with multispectral sensors-A comparison based: On monotemporal and multiseasonal field spectra - Feilhauer, Hannes; Thonfeld, Frank; Faude, Ulrike; He, Kate S.; Rocchini, Duccio; Schmidtlein, Sebastian (International Journal of Applied Earth Observation and Geoinformation, 2012)
Assessing and mapping patterns of (semi-)natural vegetation types at a large spatial scale is a difficult task. The challenge increases if the floristic variation within vegetation types (i.e., subtype variation of species composition) is the target. A desirable way to deal with this task may be to address such vegetation patterns with remote-sensing approaches. In particular data from multispectral sensors are easy to obtain, globally accessible, and often provide a high temporal resolution. They hence offer a comprehensive basis for vegetation mapping. The potential of such sensors for vegetation mapping has, however, never been thoroughly investigated. In particular, a systematic test regarding the spectral capabilities of these data for an assessment of detailed floristic variation has not been implemented to date. We thus addressed in this study the question how the ability of optical sensors to map floristic variation is affected by their respective spectral coverage and number of bands. To answer this question, we simulated monotemporal and multiseasonal data of eleven multispectral sensors. These data were used to model gradual transitions in species composition (i.e., floristic gradients) within three types of spontaneous vegetation typical for Central Europe using Partial Least Squares regression. Comparison of the model fits (ranging up to R2 = 0.76 in cross-validation) illustrated the potential of multispectral data for detailed vegetation mapping. The results show that spectral coverage of the entire solar-reflective domain is the most important sensor characteristic for a successful assessment of floristic variation. Model and sensor performances as well as limitations are thoroughly discussed, and recommendations for sensor development are made based on the final conclusions of this study. © 2012 Elsevier B.V.
Keywords: Conservation; Isometric feature mapping; Optical remote sensing; Partial Least Squares regression; Subclass information; Vegetation

Assessing moisture sources of precipitation in the Western Pamir Mountains (Tajikistan, Central Asia) using deuterium excess - Juhlke, Tobias; Meier, Christiane; van Geldern, Robert; Vanselow, Kim; Wernicke, Jakob; Baidulloeva, Jamila; Barth, Johannes; Weise, Stephan M. (Tellus B, 2019)
Air moisture of oceanic origin can be subject to long-range transport and could contribute to precipitation at distant places. With ongoing climate change the relationship between water vapour sources and sinks is under constant evolution and plays an important role for water budget assessments. This study analysed monthly integrated and event-based precipitation samples from two field sites in the Western Pamir Mountains (Tajikistan) for stable isotope compositions of oxygen (O-18) and hydrogen (H-2) of water. The aim was to investigate water vapour sources and, in particular, to evaluate contributions of water vapour from the Mediterranean region. The latter has been often postulated as a potential moisture source region for Central Asia. Deuterium excess values (d), that serve as a fingerprint of moisture origin, were below 13 parts per thousand in monthly integrated samples, for most of the year. This indicates a smaller contribution of high Mediterranean moisture (approximate to 20 parts per thousand) to the Western Pamir Mountains than originally expected. A maximum d value of 19 parts per thousand was observed in March, which is not in agreement with the common observation of increased Mediterranean contribution during winter (DJF). A Lagrangian backward trajectory model (HYSPLIT) was applied to infer the general air mass origin for sampled precipitation events. A maximum contribution of western' moisture of 40% was also detected in March, while 40%-60% of moisture that contributed to precipitation events in winter was transported by trajectories that originated from the Northern Indian Ocean.
CRIS-Team WoS Importer:2019-05-07

Assessing Snow Accumulation Patterns and Changes on the Patagonian Icefields - Bravo, Claudio; Bozkurt, Deniz; Gonzalez-Reyes, Alvaro; Quincey, Duncan J.; Ross, Andrew N.; Farías Barahona, David; Rojas, Maisa (Frontiers in Environmental Science, 2019)
Recent evidence shows that most Patagonian glaciers are receding rapidly. Due to the lack of in situ long-term meteorological observations, the understanding of how glaciers are responding to changes in climate over this region is extremely limited, and uncertainties exist in the glacier surface mass balance model parameterizations. This precludes a robust assessment of glacier response to current and projected climate change. An issue of central concern is the accurate estimation of precipitation phase. In this work, we have assessed spatial and temporal patterns in snow accumulation in both the North Patagonia Icefield (NPI) and South Patagonia Icefield (SPI). We used a regional climate model, RegCM4.6 and four Phase Partitioning Methods (PPM) in addition to short-term snow accumulation observations using ultrasonic depth gauges (UDG). Snow accumulation shows that rates are higher on the west side relative to the east side for both icefields. The values depend on the PPM used and reach a mean difference of 1,500 mm w.e., with some areas reaching differences higher than 3,500 mm w.e. These differences could lead to divergent mass balance estimations depending on the scheme used to define the snow accumulation. Good agreement is found in comparing UDG observations with modeled data on the plateau area of the SPI during a short time period; however, there are important differences between rates of snow accumulation determined in this work and previous estimations using ice core data at annual scale. Significant positive trends are mainly present in the autumn season on the west side of the SPI, while on the east side, significant negative trends in autumn were observed. Overall, for the rest of the area and during other seasons, no significant changes can be determined. In addition, glaciers with positive and stable elevation and frontal changes determined by previous works are related to areas where snow accumulation has increased during the period 2000-2015. This suggests that increases in snow accumulation are attenuating the response of some Patagonian glaciers to warming in a regional context of overall glacier retreat.
CRIS-Team WoS Importer:2019-04-18

Assessing the impact of an invasive bryophyte on plant species richness using high resolution imaging spectroscopy - Ewald, Michael; Skowronek, Sandra; Aerts, Raf; Lenoir, Jonathan; Feilhauer, Hannes; Van De Kerchove, Ruben; Honnay, Olivier; Somers, Ben; Garzón-López, Carol X.; Rocchini, Duccio; Schmidtlein, Sebastian (Ecological Indicators, 2020)
Remote sensing is commonly used to map the presence of invasive alien plant species across large areas. However, remote sensing also has potential to predict fractional cover, which is more closely linked to the potential ecosystem impact of invasive alien plant species. Here, we mapped the fractional cover of the invasive bryophyte Campylopus introflexus using high resolution imaging spectroscopy (233 bands, 490–2430 nm, 3 m × 3 m pixel size) in different habitat types within a coastal dune ecosystem. Maps were predicted from generalized partial least squares (gPLS) regression models trained with cover information from 266 field plots (3 m × 3 m). Models were calibrated using different data subsets, following a spatially blocked subsampling design. In addition, the relationship between C. introflexus fractional cover and plant species richness was evaluated using a subset of plot data. Fractional cover estimates from gPLS models resulted in R2 values of 0.64 ± 0.17 and an RMSE of 0.14 ± 0.02 based on independent validation data. Field observations showed a negative relationship between C. introflexus fractional cover and local plant species richness for pixels with a fractional cover above 44%. This threshold was exceeded in 4.3–7.1% of the studied area depending on the habitat type. Our study demonstrates that remote sensing can be used to map the fractional cover of an invasive bryophyte in a coastal dune ecosystem. Combining cover maps with a threshold value derived from an abundance-impact relationship we were able to highlight areas with potential negative impact on local plant species richness. This method can be implemented on other species and other ecosystem properties affected by plant invasions, allowing to highlight potential invasion impacts in a spatially explicit manner.
CRIS-Team Scopus Importer:2019-11-29
Keywords: Abundance-impact curves; Fractional cover threshold; Heath star moss; Hyperspectral remote sensing

Assimilation of Antarctic velocity observations provides evidence for uncharted pinning points - Fürst, Johannes; Gillet-Chaulet, Fabien; Merino, Nacho; Tavard, Laure; Mouginot, Jeremie; Gourmelen, Noël; Gagliardini, Olivier; et al. (Cryosphere, 2015)
In ice flow modelling, the use of control methods to assimilate the dynamic and geometric state of an ice body has become common practice. These methods have primarily focussed on inverting for one of the two least known properties in glaciology, namely the basal friction coefficient or the ice viscosity parameter. Here, we present an approach to infer both properties simultaneously for the whole of the Antarctic ice sheet. After the assimilation, the root-mean-square deviation between modelled and observed surface velocities attains 8.7 ma(-1) for the entire domain, with a slightly higher value of 14.0 ma(-1) for the ice shelves. An exception in terms of the velocity mismatch is the Thwaites Glacier Ice Shelf, where the RMS value is almost 70 ma(-1). The reason is that the underlying Bedmap2 geometry ignores the presence of an ice rise, which exerts major control on the dynamics of the eastern part of the ice shelf. On these grounds, we suggest an approach to account for pinning points not included in Bedmap2 by locally allowing an optimisation of basal friction during the inversion. In this way, the velocity mismatch on the ice shelf of Thwaites Glacier is more than halved. A characteristic velocity mismatch pattern emerges for unaccounted pinning points close to the marine shelf front. This pattern is exploited to manually identify seven uncharted features around Antarctica that exert significant resistance to the shelf flow. Potential pinning points are detected on Fimbul, West, Shackleton, Nickerson and Venable ice shelves. As pinning points can provide substantial resistance to shelf flow, with considerable consequences if they became ungrounded in the future, the model community is in need of detailed bathymetry there. Our data assimilation points to some of these dynamically important features not present in Bedmap2 and implicitly quantifies their relevance.

A statistical downscaling method for daily air temperature in data-sparse, glaciated mountain environments - Hofer, Marlis; Marzeion, Benjamin; Mölg, Thomas (Geoscientific Model Development, 2015)
This study presents a statistical downscaling (SD) method for high-altitude, glaciated mountain ranges. The SD method uses an a priori selection strategy of the predictor (i.e., predictor selection without data analysis). In the SD model validation, emphasis is put on appropriately considering the pitfalls of short observational data records that are typical of high mountains. An application example is shown, with daily mean air temperature from several sites (all in the Cordillera Blanca, Peru) as target variables, and reanalysis data as predictors. Results reveal strong seasonal variations of the predictors' performance, with the maximum skill evident for the wet (and transitional) season months January to May (and September), and the lowest skill for the dry season months June and July. The minimum number of observations (here, daily means) required per calendar month to obtain statistically significant skill ranges from 40 to 140. With increasing data availability, the SD model skill tends to increase. Applied to a choice of different atmospheric reanalysis predictor variables, the presented skill assessment identifies only air temperature and geopotential height as significant predictors for local-scale air temperature. Accounting for natural periodicity in the data is vital in the SD procedure to avoid spuriously high performances of certain predictors, as demonstrated here for near-surface air temperature. The presented SD procedure can be applied to high-resolution, Gaussian target variables in various climatic and geo-environmental settings, without the requirement of subjective optimization.

Astronomie : die Geheimnisse des Universums mit seinen Planeten und Sternen. Hildenheim 1995 - Hübner, Thomas (1995)

Astronomie : die Geheimnisse des Universums mit seinen Planeten und Sternen. Hildesheim 2000 - Hübner, Thomas (2000)

Asymétries institutionnelles et territoriales. Quelles conséquences pour la gouvernance transfrontalière ? - Evrard, Estelle; Chilla, Tobias (Vivre et penser la coopération transfrontalière, 2014)

Atlantic pycnocline theory scrutinized using a coupled climate model - Levermann, Anders; Fürst, Johannes (Geophysical Research Letters, 2010)
Simulations with changed Southern Ocean wind-stress, oceanic vertical mixing, surface freshwater forcing and global warming confirm the basic equations of Gnanadesikan's (1999) theory for the Atlantic: one vertical scale, the pycnocline depth D, contributes inversely proportional to low-latitudinal upwelling and linearly to Southern Ocean eddy transport. The maximum Atlantic overturning is confirmed to be quadratic in D but is also shown to be linear in a meridional density difference Delta rho. Our simulations strongly suggest that the theory needs to be complemented by a dynamical equation for Delta rho since changes in both D and Delta rho are significant and mutually independent. While, under global warming D varies strongly and Delta rho is practically constant, the situation is reversed for altered surface freshwater fluxes. Similarly, variations in the meridional length scale of Southern Ocean outcropping require a dynamical equation in order to capture the fundamental behavior of the Atlantic meridional overturning circulation. Citation: Levermann, A., and J. J. Furst (2010), Atlantic pycnocline theory scrutinized using a coupled climate model, Geophys. Res. Lett., 37, L14602, doi:10.1029/2010GL044180.

Atlas du Luxembourg / Luxemburg-Atlas - Patrick, Bousch; Schulz, Christian; Chilla, Tobias; Gerber, Philippe; Sohn, Christophe; Wiktorin, Dorothea (., 2009)
UnivIS-Import:2015-04-02:Pub.2009.nat.dgeo.IG.pgeog.atlasd

Atlas für Himmelsbeobachter : der Sternatlas zum Himmelsjahr ; mit 50 Sternkarten des gesamten Himmels. Stuttgart 1989 - Hübner, Thomas (1989)

Atmospheric deposition and impact of forest thinning on the throughfall of mountain forest ecosystems in the Bavarian Alps - Bäumler, Rupert; et al. (Forest Ecology and Management, 1997)
The input into two forested watersheds in the Bavarian Alps is characterised by 2000 mm mean annual precipitation. Evaporation from the tree crown surfaces varies between 25 and 30%. The input is influenced by multiple natural and man-made processes. In addition to the general climate, these are local weather conditions, the growing season, processes of combustion (traffic and domestic fuel), tourism, farming, and not least by processes in the canopy. The input of SO4-S is comparatively low, while high amounts of acidity and nitrogen are deposited. The input occurs mainly as dissolved salts. A considerable amount of the acidity deposited is buffered in the canopy by cation exchange and by calcareous dusts, which are blown out from the limestone and dolomite mountains nearby, and redeposited on leaf surfaces. Forest thinning (removal of 40% of the stem volume) caused marked changes in the deposition pattern. Interception and deposition rates of individual ions were reduced by up to 45%. The amount and chemical composition of the throughfall occupied an intermediate position between bulk precipitation and the throughfall of the control watershed. Ions which are preferentially exchanged and leached from the leaves, e.g. potassium and organic compounds, were affected the most.
UnivIS-Import:2015-03-05:Pub.1997.nat.dgeo.IG.profes_1.atmosp
Keywords: Forest thinning; Mountain forests; Throughfall chemistry; Watershed

Atmospheric processes and climatological characteristics of the 79N glacier (NE Greenland) - Turton, Jenny; Mölg, Thomas; van As, Dirk (Monthly Weather Review, 2019)
The Nioghalvfjerdsfjorden glacier (the 79 fjord, henceforth referred to as 79N) has been thinning and accelerating since the early 2000s, as a result of calving episodes at the front of the glacier. As 8% of the Greenland Ice Sheet drains into 79N, changes in the stability of 79N could propagate into the interior of Greenland. Despite this concern, it is about 79N. We present the surface atmospheric processes and climatology of the 79N region from analyzes of data from four automatic weather stations (AWS) and reanalysis data from ERA interim. Over the floating section of the glacier, the annual average air temperature is -16.7°C, decreasing to -28.5°C during winter. Winds over the glacier are predominantly westerly and are of katabatic origin. Over the last 39 years the near-surface air temperature has increased at a rate of +0.08°C yr-1. In addition, we find that large, rapid (48 h) temperature increases (>10°C) occur during the five-month dark period (November-March). Eight (+/-4) warm-air events occur annually from 1979 to 2017. We use the Weather Research and Forecasting (WRF) model to simulate a particular warm-air event with above-freezing air temperatures between 30 November and 2 December 2014. The warm warm-air advection from the southeast and a subsequent increase in the longwave radiation towards the surface due to low-level cloud formation. By bringing the skin temperatures to the melting point.<br
Keywords: Polar; meteorology; Greenland; atmosphere; advection; observations; model; reanalysis

Atom : Forschung zwischen Faszination und Schrecken. Stuttgart 1994 - Hübner, Thomas (1994)

A tree-ring–based summer (June–July) minimum temperature reconstruction for the western Kunlun Mountains since AD 1681 - Huang, Ru; Zhu, Haifeng; Liang, Eryuan; Asad, Fayaz; Grießinger, Jussi (Theoretical and Applied Climatology, 2019)
Knowledge of past climatic variability for the Tibetan Plateau (TP), especially the northwestern part of it, is still limited due to the lack of long-term meteorological records. Within this study, we developed a summer (June–July) minimum temperature reconstruction since 1681 based on annual tree-ring width of Schrenk’s spruce (Picea schrenkiana Fisch. et Mey.) from a humid timberline on the western Kunlun Mountains. Our reconstruction passed the statistical calibration and validation tests, and accounted for 37.69% of the variance for the instrumental record during the period 1960–1996. The reconstruction mainly exhibited annual to decadal temperature variability, with cold periods in 1694–1696, 1745–1749, 1823–1824, and 1915–1921, and warm periods in 1755–1760, 1795–1799, and 1894–1896. Spatial correlations and comparisons with the Asia summer temperature reconstructions further verified our temperature reconstruction and its capability to serve as a proxy for large-scale temperature variability on the northwestern TP. Our results clearly indicate the great potential to perform dendrochronological studies on the western Kunlun Mountains.
CRIS-Team Scopus Importer:2019-10-25

A tree ring-based winter temperature reconstruction for the southeastern Tibetan Plateau since 1340 CE - Huang, Ru; Zhu, Haifeng; Liang, Eryuan; Liu, Bo; Shi, Jiangfeng; Zhang, Ruibo; Yuan, Yujiang; Grießinger, Jussi (Climate Dynamics, 2019)
Keywords: Dendroclimatology; Solar activity; Winter temperature; Southeastern Tibetan Plateau; Volcanic eruption

A tree-ring delta O-18 series from southernmost Fuego-Patagonia is recording flavors of the Antarctic Oscillation - Meier, Wolfgang; Aravena, Juan-Carlos; Jana, Ricardo; Braun, Matthias; Hochreuther, Philipp; Soto-Rogel, Pamela; Grießinger, Jussi (Global and Planetary Change, 2020)
A 154 year-long, tree-ring based stable oxygen isotope time series (delta O-18(TRC)) of the evergreen southern beech (Nothofagus betuloides) was established for the southernmost part of Patagonia. The trees grew on the terminal moraine system of the Schiaparelli Glacier (54.4 degrees S) within the windward and hyper-humid zone of the Austral Andes. The annually resolved delta O-18(TRC) record spans the common period 1861-2015 and is based on the analysis of five individually analyzed tree individuals showing a significant mean interseries correlation (r = 0.69). To date, this time series represents the worldwide southernmost chronology of tree-ring delta O-18(TRC). Variations of the delta O-18(TRC) values are significantly correlated with hydroclimatic conditions, as derived from ERA-Interim re-analysis gridded data. Negative relationships between the delta O-18(TRC)-series and relative humidity (r(OctFeb) = -0.62, p < 0.0001) or the amount of precipitation (rJan-Feb = -0.52, p < 0.0001) can be observed for the austral spring and summer seasons. In contrast, a drier environment will increase the delta O-18(TRC) as revealed by a positive influence of evaporation (r(Sep-Feb) = 0.44, p < 0.01), sea level pressure (r(Oct-Feb) = 0.56, p < 0.0001) or maximum temperature (r(Oct-Feb) = 0.43, p < 0.01). Spatial correlation maps indicate a strong supra-regional influence of climate variables on the chronology. The annular pressure seesaw, termed as Antarctic Oscillation (AAO), mostly influences climate variability within the Southern Hemisphere and is positively correlated with the delta O-18(TRC)-chronology (r(JF) = 0.61, p < 0.0001). Since our chronology, as well as a neighboring delta O-18(TRC) chronology from the Perito Moreno Glacier (50 degrees S), are showing a high correspondence in their sensitivities to climate variabilities and towards the AAO, we merged both time series into a mean chronology. This new regional mean delta O-18(TRC)-chronology is highly sensitive to variations of the AAO (r = 0.79, p < 0.0001)) and is tested for the suitability to reconstruct the AAO for the last 150 years. The reconstructed time series of the AAO reveals an increasing trend towards more positive index values, which is associated with an amplification in the amount of precipitation and wind speed in southernmost South America.
CRIS-Team WoS Importer:2020-12-11

Aufbruch ins All : Sterne, Sonden, Satelliten / Siegfried Aust ; Matthias Beck. Wien 1992 - Hübner, Thomas (1993)

Aufbruch zum Mars : die Erkundung des roten Planeten / Frank Miles ; Nicholas Booth Hrsg. Stuttgart 1988 - Hübner, Thomas (1989)

Auf dem Mond : Augenzeugen berichten / Barbara Hehner ; Greg Ruhl. Hamburg 1999 - Hübner, Thomas (1999)

A unified framework to model the potential and realized distributions of invasive species within the invaded range - Hattab, Tarek; Garzon-Lopez, Carol; Ewald, Michael; Skowronek, Sandra; Aerts, Raf; Horen, Helene; Brasseur, Boris; Gallet-Moron, Emilie; Spicher, Fabien; Decocq, Guillaume; Feilhauer, Hannes; Honnay, Olivier; et al. (Diversity and Distributions, 2017)
Aim: To propose a species distribution modelling framework and its companion "iSDM" R package for predicting the potential and realized distributions of invasive species within the invaded range.Location: Northern France.Methods: The non-equilibrium distribution of invasive species with the environment within the invaded range affects the environmental representativeness of species presence-absence data collected from the field and introduces uncertainty in observed absences as these may either reflect unsuitable sites or be incidental. To address these issues, we here propose an environmental systematic sampling design to collect presence-absence data from the field and a probability index to sort and subsequently separate environmental absences (EAs: reflecting environmentally unsuitable sites) from dispersal-limited absences (DLAs: reflecting sites out of dispersal reach). We first conducted a comprehensive test based on a virtual species to evaluate the performance of our framework. Then, we applied it on different life stages of a non-native tree species (Prunus serotina Ehrh.) invasive in Europe.Results: Regarding the potential distribution, we found higher model performances for both the virtual species (true skill statistics (TSS) > 0.75) and P. serotina (TSS >= 0.68) after carefully selecting absences with a low probability to be DLAs compared with classical models that incorporate both EAs and DLAs (e.g. TSS = 0.11 for P. serotina with 80% of DLAs). On the contrary, both EAs and DLAs as well as dispersal-related covariates were needed to capture the realized distribution of both the virtual species and P. serotina.Main Conclusions: Our framework helps overcoming the conceptual and methodological limitations of the disequilibrium in species' distribution models inherent to invasive species and enables managers to robustly estimate both the realized and potential distributions of invasive species. Although more relevant for modelling the distribution of non-native species, this framework can also be applied to native species.
Keywords: alien species; biological invasions; dispersal limitations; potential niche; realized niche; species distribution modelling; virtual species

Aus Sternenstaub : die Reise zum Ursprung des Menschen. München 1997 - Hübner, Thomas (1998)

Auswirkungen des Klimawandels auf die Kryosphäre in den Polargebieten - Schneider, Christoph; Scherer, Dieter; Braun, Matthias (Geographische Rundschau, 2011)
UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IG.pgfgis.auswir

Auswirkungen eines unangepassten Agrarsystems in Südmexiko - Richter, Michael; Vanselow, Kim (Geographische Rundschau, 2020)
CRIS-Team Scopus Importer:2021-04-19

Auswirkungen natürlicher Störungen auf die Pflanzendiversität im Reintal / Wettersteingebirge - Schwabe, Birgit; Hertel, Silke; Peters, Thorsten; Richter, Michael (Mitteilungen der Fränkischen Geographischen Gesellschaft, 2009)
UnivIS-Import:2015-04-20:Pub.2009.nat.dgeo.IG.zentr.auswir

Author Correction: Increasing extreme melt in northeast Greenland linked to foehn winds and atmospheric rivers (Nature Communications, (2023), 14, 1, (1743), 10.1038/s41467-023-37434-8) - Mattingly, Kyle S.; Turton, Jenny; Wille, Jonathan D.; Noël, Brice; Fettweis, Xavier; Rennermalm, Åsa K.; Mote, Thomas L. (Nature Communications, 2024)
Correction to: Nature Communications, published online 29 March 2023 The original version of this Article contained an error in the “Introduction”, which incorrectly read ‘The Greenland Ice Sheet (GrIS) has lost 3.9 billion tons of ice since 1992.’ The correct version states ‘ 3,900 billion tons’ in place of ‘ 3.9 billion tons’. This has been corrected in both the PDF and HTML versions of the Article.
CRIS-Team Scopus Importer:2024-01-12

Automated detection and monitoring of glide-snow events using satellite-based optical remote sensing and terrestrial photography - Feick, Sebastian; Mitterer, Christoph; Dreier, Lisa; Harvey, Stephan; Schweizer, Juerg (Proceedings ISSW 2012, 2012)
On steep slopes the full snowpack can glide on the ground, tension cracks may open and eventually the slope fails as full-depth avalanche (glide-snow avalanche). Many observations have shown that a thin wet layer reduces friction between the snow-soil interface leading to snow gliding. The occurrence, however, of glide cracks and their evolution to glide avalanches are still poorly understood. Permanent monitoring of glide cracks seems most promising for predicting snow gliding and full-depth avalanches. We evaluated whether glide cracks can be automatically detected and mapped for a large area using optical satellite images with very high spatial resolution. Two approaches were tested for a 25 km2 scene from panchromatic satellite sensor WorldView-1 acquired over a test site in the Eastern Swiss Alps. Both approaches integrate image information and topographic variables derived from a digital elevation model. The first approach is based on statistical modeling techniques; the second one included an object-based image analysis. Both approaches achieved encouraging detection and mapping accuracies even though certain limitations exist. Furthermore, images from temporal high resolution time-lapse photography of two slopes that are known for gliding-snow events were used to monitor glide-crack evolution and glide-avalanche occurrence.
UnivIS-Import:2015-04-16:Pub.2012.nat.dgeo.IG.zentr.automa
Keywords: GAM; Gleitschneelawine; object-based image analysis; objektbasierte Bildanalyse; remote sensing; statistische Modellierung automated detection; avalanche; glide-snow; statistical modelling

Automated Detection of Glacier Surges from Sentinel-1 Surface Velocity Time Series-An Example from Svalbard - Koch, Moritz; Seehaus, Thorsten; Friedl, Peter; Braun, Matthias (Remote Sensing, 2023)
Even though surge-type glaciers make up only a small percentage of all glaciers, related research contributes considerably to the general understanding of glacier flow mechanisms. Recent studies based on remote sensing techniques aimed to disentangle underlying processes related to glacier surges. They have proven the possibilities yielded by combining high performance computing and earth observation. In addition, modelling approaches to surges have seen increasing popularity, yet large spatial and temporal data about timing of surge incites are missing. We aimed to develop an algorithm that not only detects surge type glaciers but also determines the timing of a surge onset, while being computationally inexpensive, transferable, and expandable in time and space. The algorithm is based on time series analyses of glacier surface velocity derived from Sentinel-1 data. After seasonal and trend decomposition, outlier detection is performed by the General Studentized Extreme Deviate Test, an iterative algorithm well suited for outlier detection in univariate time series. To determine surges, cluster analysis is performed to identify outlier clusters, which are linked to glacier surges. We demonstrate the viability on the Svalbard archipelago for the period 2015 to 2021 where we have identified 18 glacier surges and the timing of their active phase.
CRIS-Team WoS Importer:2023-04-21

Automatic delineation of debris-covered glaciers using InSAR coherence derived from X-, C- and L-band radar data: a case study of Yazgyl Glacier - Lippl, Stefan; Vijay, Saurabh; Braun, Matthias (Journal of Glaciology, 2018)
Despite their importance for mass-balance estimates and the progress in techniques based on optical and thermal satellite imagery, the mapping of debris-covered glacier boundaries remains a challenging task. Manual corrections hamper regular updates. In this study, we present an automatic approach to delineate glacier outlines using interferometrically derived synthetic aperture radar (InSAR) coherence, slope and morphological operations. InSAR coherence detects the temporally decorrelated surface (e.g. glacial extent) irrespective of its surface type and separates it from the highly coherent surrounding areas. We tested the impact of different processing settings, for example resolution, coherence window size and topographic phase removal, on the quality of the generated outlines. We found minor influence of the topographic phase, but a combination of strong multi-looking during interferogram generation and additional averaging during coherence estimation strongly deteriorated the coherence at the glacier edges. We analysed the performance of X-, C- and L- band radar data. The C-band Sentinel-1 data outlined the glacier boundary with the least misclassifications and a type II error of 0.47% compared with Global Land Ice Measurements from Space inventory data. Our study shows the potential of the Sentinel-1 mission together with our automatic processing chain to provide regular updates for land-terminating glaciers on a large scal
Keywords: debris-covered glaciers; glacier delineation; glacier mapping; glacier monitoring; remote sensing

Badeseen und Naturbäder in Mittelfranken / hrsg. von Stefan Weinacht. Cadolzburg 2002 - Hübner, Thomas (2002)

Bahnmüller, Lisa: Wanderungen für Senioren Fränkische Schweiz : 30 entspannte Touren mit herrlichen Aussichten / Lisa und Winfried Bahnmüller. München 2020 - Hübner, Thomas (2020)

Bamberchä Mundart-Quizbüchla. Bamberg 2013 - Hübner, Thomas (2014)

Bamberger Familien-Touren : Spaziergänge und Wanderungen in Stadt und Land für Jung und Alt. Bamberg 2008 - Hübner, Thomas (2009)

Bamberg - neuere Stadtentwicklung - Neufeld, Markus; Chilla, Tobias (Jenseits des Nürnberger Trichters - Ideen für einen zukunftsorientierten Geographieunterricht, 2012)
UnivIS-Import:2015-04-16:Pub.2012.nat.dgeo.IG.zentr.bamber_9

Banlieue - Tijé-Dra, Andreas; Germes, Melina (Ortsregister: Ein Glossar der Gegenwart, 2012)

Bauermeister, Christiane (u.a.): Baltikum. 5., aktualisierte Aufl. Ostfildern 2019 - Hübner, Thomas (2020)

Bauer, Michael: Herzstücke in Franken : Besonderes abseits der bekannten Wege entdecken / Michael Bauer ; Thomas Starost. München 2021 - Hübner, Thomas (2021)

Baur, Manfred: Der Mars : Aufbruch zum Roten Planeten. Nürnberg 2021 - Hübner, Thomas (2022)

Baur, Manfred: Weltraumatlas. Nürnberg 2022 - Hübner, Thomas (2023)

Bavaria's rural areas in the mirror of demographic developments since 1960 - Bätzing, Werner (Geographische Rundschau, 2021)
The analysis of population development at county and city level between 1961 and 2019 shows that in the period up to 2004 the policy of fostering a system of central places tended to diminish spatial disparities between the countryside and cities. But since 2004, the countryside has again suffered major problems. This situation calls for a new political instrument, "endogenous regional development", to prevent the emergence of large conurbations on one hand and thinly populated peripheries on the other hand.
CRIS-Team Scopus Importer:2021-07-02
Keywords: demography; political system; population growth; regional development; rural area; spatial analysis

Bavaria: Territorial and Socio-Economic Characteristics of the Region - Weidinger, Tobias; Kordel, Stefan (Classification of MATILDE Regions. Spatial Specificities and Third Country Nationals Distribution (= Deliverable 2.1 of MATILDE project), 2020)

Baxter, Sarah: 500 Walks : legendäre Erlebnis-Wanderungen weltweit. München 2019 - Hübner, Thomas (2019)

Baxter, Sarah: 500 Zugreisen : legendäre Eisenbahnfahrten weltweit. München 2019 - Hübner, Thomas (2019)

Bayesian U-Net for Segmenting Glaciers in Sar Imagery - Hartmann, Andreas; Davari, Amirabbas; Seehaus, Thorsten; Braun, Matthias; Maier, Andreas; Christlein, Vincent (2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021)
Fluctuations of the glacier calving front have an important influence over the ice flow of whole glacier systems. It is therefore important to precisely monitor the position of the calving front. However, the manual delineation of SAR images is a difficult, laborious and subjective task. Convolutional neural networks have previously shown promising results in automating the glacier segmentation in SAR images, making them desirable for further exploration of their possibilities. In this work, we propose to compute uncertainty and use it in an Uncertainty Optimization regime as a novel two-stage process. By using dropout as a random sampling layer in a U-Net architecture, we create a probabilistic Bayesian Neural Network. With several forward passes we create a sampling distribution, which can estimate the model uncertainty for each pixel in the segmentation mask. The additional uncertainty map information can serve as a guideline for the experts in the manual annotation of the data. Furthermore, feeding the uncertainty map to the network leads to 95.24 % Dice similarity, which is an overall improvement in the segmentation performance compared to the state-of-the-art deterministic U-Net-based glacier segmentation pipelines.
Keywords: Image segmentation; Uncertainty; Annotations; Pipelines; Manuals; Probabilistic logic; Radar polarimetry; Glacier segmentation; Bayesian deep learning; Convolutional neural networks; Image Segmentation

Bayreuth – Porträt einer Stadt / Michael Anger ; Gabi Strobel. Meßkirch 2016 - Hübner, Thomas (2016)

BayTreeNet. Sprechende Bäume als Schnittstelle von Klimadynamik, Dendroökologie und Bildung für nachhaltige Entwicklung in Bayern. - Bräuning, Achim; Debel, Annette Caroline; Collier, Emily; Höhnle, Steffen; Mölg, Thomas; Schubert, Jan Christoph; Thieroff, Bernhard; Wehrmann, Sibille (Mitteilungen der Fränkischen Geographischen Gesellschaft, 2021)

BAYWRF: A high-resolution present-day climatological atmospheric dataset for Bavaria - Collier, Emily; Mölg, Thomas (Earth System Science Data, 2020)
Climate impact assessments require information about climate change at regional and ideally also local scales. In dendroecological studies, this information has traditionally been obtained using statistical methods, which preclude the linkage of local climate changes to large-scale drivers in a process-based way. As part of recent efforts to investigate the impact of climate change on forest ecosystems in Bavaria, Germany, we developed a high-resolution atmospheric modelling dataset, BAYWRF, for this region over the thirty-year period of September 1987 to August 2018. The atmospheric model employed in this study, the Weather Research and Forecasting (WRF) model, was configured with two nested domains of 7.5 and 1.5 km grid spacing centred over Bavaria and forced at the outer lateral boundaries by ERA5 reanalysis data. Using an extensive network of observational data, we evaluate (i) the impact of using grid analysis nudging for a single-year simulation of the period of September 2017 to August 2018 and (ii) the full BAYWRF dataset generated using nudging. The evaluation shows that the model represents variability in near-surface meteorological conditions generally well, although there are both seasonal and spatial biases in the dataset that interested users should take into account. BAYWRF provides a unique and valuable tool for investigating climate change in Bavaria with high interdisciplinary relevance. Data from the finest-resolution WRF domain are available for download at daily temporal resolution from a public repository at the Open Science Framework
CRIS-Team Scopus Importer:2020-12-18

Becht, Sabine: Ostseeküste : Mecklenburg-Vorpommern / Sabine Becht ; Sven Talaron. 7., komplett überarbeitete und aktualisierte Aufl. Erlangen 2020 - Hübner, Thomas (2021)

Beck, Sebastian (Hrsg.): Urlaub daheim : 25 Entdeckungen abseits des Trubels in Bayern / Sebastian Beck (Hg.). München 2021 - Hübner, Thomas (2022)

Begegnung mit Franken 2. Bamberg 2008 - Hübner, Thomas (2009)

Begegnung mit Franken 3. Bamberg 2009 - Hübner, Thomas (2010)

Beidseits der Aisch : 25 Wanderungen zwischen Bad Windsheim und Forchheim. Nürnberg 2004 - Hübner, Thomas (2005)

Being a tourist – being at home: reconstructing tourist experiences and negotiating home in retirement migrants’ daily lives - Kordel, Stefan (Practising the Good Life / The Good Life in Practises, 2015)
Keywords: Migration; Ageing; Home; Spain

Beirut - Glasze, Georg (The Encyclopedia of global studies, 2012)

Benachteiligungen begegnen: Mobility Maps als visuell-partizipatives Tool zur Anslyse von Lebenswelten geflüchteter Menschen in ländlichen Räumen. - Kordel, Stefan; Weidinger, Tobias; Hachmeister, Silke (Kritische Geographien ländlicher Entwicklung. Globale Transformationen und lokale Herausforderungen, 2019)
Keywords: Ländliche Räume; Methodik; Mobility Mapping; Erreichbarkeit; Geflüchtete

Benthic food web structure in the Comau fjord, Chile ( 42°S): Preliminary assessment including a site with chemosynthetic activity - Zapata-Hernández, Germán; Sellanes, Javier; Mayr, Christoph; Munoz, Práxedes (Progress in Oceanography, 2014)

Benthic meltwater fjord habitats formed by rapid glacier recession on King George Island, Antarctica - Jerosch, Kerstin; Pehlke, Hendrik; Monien, Patrick; Scharf, Frauke; Weber, Lukas; Kuhn, Gerhard; Braun, Matthias; Abele, Doris (Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences, 2018)

Beobachtung - Glasze, Georg (Methoden-Lexikon für die Sozialwissenschaften, 2015)

Berättelser om naturen i landsbygds- och migrationsstudier - Eimermann, Marco; Kordel, Stefan; Singleton, Benedict E.; Webster, Natasha A.; Weidinger, Tobias; Yachin, Jonathan (2022)
En bloggserie av Marco Eimermann, Stefan Kordel, Benedict E. Singleton, Natasha A. Webster, Tobias Weidinger & Jonathan Yachin. Under våren 2022 har vi publicerat ett inlägg varannan vecka i den här serien, som vi kallar ”Berättelser om naturen i landsbygds- och migrationsstudier”. Detta inom ramen för "Kunskaper för landsbygder", en SLU-blog

Berg, Susanne: 101 Sachen machen : alles, was Du in & um Nürnberg erlebt haben musst. München 2020 - Hübner, Thomas (2020)

Berry, Oliver (u.a.): Europa ohne Flieger : 80 inspirierende und nachhaltige Reiseideen. Ostfildern 2020 - Hübner, Thomas (2020)

Berthold, Lothar (u.a.): Auf in den Süden! : Geschichte der Fürther Südstadt. Nürnberg 2017 - Hübner, Thomas (2018)

Bethang – Nürnberg, Fürth, Erlangen : Wandern an den Grenzen einer Stadtutopie / Hrsg. Fränkischer Albverein. Cadolzburg 2020 - Hübner, Thomas (2020)

Beyerle, Hubert: Kroatien / Hubert Beyerle ; Dietrich Höllhuber. 5., aktualisierte und erw. Aufl. Ostfildern 2019 - Hübner, Thomas (2019)

Bey, Jens: Simple Travel : 35 überraschende Trips durch Europa / Jens Bey ; Yvonne Weik. Ostfildern 2021 - Hübner, Thomas (2022)

Beyond dating: Archeological wood as a source of information of environmental changes in High Asia - Bräuning, Achim; Scharf, Andreas; Kretschmer, Wolfgang; Burchardt, Iris (TRACE - Tree Rings in Archaeology, Climatology and Ecology, Vol. 11: Proceedings of the DENDROSYMPOSIUM 2012 Scientific Technical Report STR13/05, GFZ Potsdam, 2013)

Bibliographie der selbständigen deutschsprachigen nichttechnischen Literatur zur Raumfahrt : Berichtszeit: 19. Jh. - 1984 - Hübner, Thomas (1985)
Keywords: Raumfahrt; Bibliographie

Big data in Antarctic sciences-current status, gaps, and future perspectives - Graiff, Angelika; Braun, Matthias; Driemel, Amelie; Ebbing, Jörg; Grossart, Hans Peter; Harder, Tilmann; Hoffman, Joseph I.; Koch, Boris; Leese, Florian; Piontek, Judith; Scheinert, Mirko; Quillfeldt, Petra; et al. (Polarforschung, 2023)
This paper was initiated by a multidisciplinary Topic Workshop in the frame of the Deutsche Forschungsgemeinschaft Priority Program 1158 "Antarctic Research with Comparative Investigations in Arctic Ice Areas", and hence it represents only the national view without claiming to be complete but is intended to provide awareness and suggestions for the current discussion on so-called big data in many scientific fields. The importance of the polar regions and their essential role for the Earth system are both undoubtedly recognized. However, dramatic changes in the climate and environment have been observed first in the Arctic and later in Antarctica over the past few decades. While important data have been collected and observation networks have been built in Antarctica and the Southern Ocean, this is a relatively data-scarce region due to the challenges of remote data acquisition, expensive labor, and harsh environmental conditions. There are many approaches crossing multiple scientific disciplines to better understand Antarctic processes; to evaluate ongoing climatic and environmental changes and their manifold ecological, physical, chemical, and geological consequences; and to make (improved) predictions. Together, these approaches generate very large, multivariate data sets, which can be broadly classified as "Antarctic big data". For these large data sets, there is a pressing need for improved data acquisition, curation, integration, service, and application to support fundamental scientific research. Based on deficiencies in crossing disciplines and to attract further interest in big data in Antarctic sciences, this article will (i) describe and evaluate the current status of big data in various Antarctic-related scientific disciplines, (ii) identify current gaps, (iii) and provide solutions to fill these gaps.
CRIS-Team Scopus Importer:2023-10-13

Biodiversity as a Resource: Plant Use and Land Use among the Shuar, Saraguros, and Mestizos in Tropical Rainforest Areas of Southern Ecuador - Gerique-Zipfel, Andres (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2011)

Biodiversity as a Resource: Plant Use, Land Use, and Nature Conservation in Shuar, Saraguro, and Mestizo Communities in South-Eastern Ecuador - Gerique-Zipfel, Andres (Medicinal Plants and the Legacy of Richard E. Schultes – Proceedings of the Botany 2011 Symposium Honoring Dr. Richard E. Schultes. Trujillo, 2012)

Blauer Punkt im All : unsere Zukunft im Kosmos. München 1996 - Hübner, Thomas (1996)

Bleiben oder Gehen? Einflussfaktoren auf die Wohnstandortmobilität anerkannter Flüchtlinge in ländlichen Räumen am Beispiel des Bayerischen Waldes - Weidinger, Tobias; Kordel, Stefan; Pohle, Perdita (Europa Regional, 2017)
Eine zunehmende Zahl von Asylbewerbern erreichte in den vergangenen Jahren Europa und wurde auf der Grundlage staatlicher Verteilungspolitiken auch in ländlichen Gebieten untergebracht. Diese Form internationaler Zuwanderung in ländliche Räume wurde in der Forschung bisher nur randständig betrachtet, wenngleich sie von unterschiedlichen Akteuren als regionaler Entwicklungsimpuls gesehen wird, mithilfe dessen sich Infrastrukturrückbau in Folge von Abwanderung und Geburtenrückgang sowie Arbeitskräftemangel entgegenwirken ließe. Es ist unklar, wie persistent diese Zuwanderungsprozesse für ländliche Räume sind und ob Asylbewerber auch nach der Zuerkennung des Flüchtlingsstatus, wenn sie ihren Wohnstandort frei wählen dürfen, auf dem Land wohnen bleiben (staying put) oder in die Städte weiterwandern (onward migration). Am Beispiel zweier Landkreise im Bayerischen Wald (Deutschland) wird im Beitrag die Wohnstandortmobilität anerkannter Flüchtlinge vor dem Hintergrund von individuellen Wohnstandortwünschen und strukturellen Faktoren wie lokalem Wohnungs- und Arbeitsmarkt, sozialem Umfeld und rechtlichen Aspekten diskutiert. Unter Zuhilfenahme des Integrationsmodells von Ager und Strang werden dabei strukturelle Spezifika ländlicher Räume für die Entscheidung über Bleiben oder Weiterwandern herausgearbeitet. Basierend auf leitfadengestützten Experteninterviews mit lokalen Akteuren zeigen empirische Daten sowohl Land-Stadt-Wanderung, Rückwanderung in ländliche Räume, Zuwanderung in ländliche Räume und rural staying. Individuelle Unsicherheitsfaktoren unterstreichen jedoch den vorläufigen Charakter der Wohnstandortmobilität anerkannter Flüchtlinge. Bei der Suche nach Wohnraum vor Ort und der Integration von Geflüchteten im sozialen Wohnumfeld kommt der Unterstützung durch lokale Akteure eine bedeutende Rolle zu, die direkt oder indirekt Einfluss auf die Wohnstandortmobilität hat. Dabei zeigen lokal-regionale Unterschiede die Heterogenität ländlicher Räum
Keywords: Migration; Mobilität; Integration; Wohnen; Flüchtlinge; ländliche Räume; Bayern

Bleibeorientierung Geflüchteter, die Rolle der Aufnahmegesellschaft und Haltestrategien der Lokalpolitik. - Kordel, Stefan; Gasch, Simone; Glorius, Birgit; Mehl, Peter; Osigus, Torsten; Schammann, Hannes; Schneider, Hanne; Spenger, David; Weidinger, Tobias; Younso, Christin (Geflüchtete in ländlichen Regionen Deutschlands, 2022)
Das Kapitel fokussiert erstens die Bleibeorientierung von Geflüchteten in länd- lichen Wohnorten. Dafür werden sowohl statistische Daten aus dem Ausländer- zentralregister (AZR) als auch narrative Interviews analysiert. Neben der Frage, wie viele bleiben und wer bleibt, werden auch strukturelle Rahmenbedingungen und individuelle Konstellationen, die das Bleiben wahrscheinlicher machen, thematisiert. Zweitens diskutiert das Kapitel, wie Bleiben mit Einstellungen der Lokalbevölkerung zusammenhängt und drittens inwiefern Haltestrategien von der Lokalpolitik artikuliert werden.
Keywords: Staying; Geflüchtete; Rezeptivität; Lokale Migrationspolitik; Ländliche Regionen

Blick in das kalte Weltall : Protosterne, Staubscheiben und Schwarze Löcher. Stuttgart 1992 - Hübner, Thomas (1993)

Blümchenschau, Festivalisierung oder strategische Stadtentwicklung? Die Landesgartenschau Bamberg 2012. - Chilla, Tobias; Neufeld, Markus (Springer Verlag, 2013)
UnivIS-Import:2015-04-02:Pub.2013.nat.dgeo.IG.pgeog.blmche

Bodenschutz - Bäumler, Rupert (Lehrbuch Geographie, 2006)
UnivIS-Import:2015-04-20:Pub.2006.nat.dgeo.IG.profes_1.bodens

Böden und Bodennutzung in Bhutan - Gratwanderung zwsichen Ressourcenschutz und Ernährungssicherung - Bäumler, Rupert (Geographische Rundschau, 2007)
UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IG.profes_1.bdenun

Boreal spring precipitation variability in the cold arid western Himalaya during the last millennium, regional linkages, and socio-economic implications - Yadava, Akhilesh Kumar; Bräuning, Achim; Singh, Jayendra; Yadav, Ram Ratan (Quaternary Science Reviews, 2016)
Precipitation in the monsoon shadow zone of the western Himalayan region, largely under the influence of mid-latitude westerlies, is the dominant regional socioeconomic driver. Current knowledge of long-term regional precipitation variability is scarce due to spatially and temporally limited weather and high-resolution proxy climate records. We developed the first boreal spring precipitation reconstruction for the western Himalaya covering the last millennium (1030–2011 C.E.). The annually resolved reconstruction is based on a large tree-ring data set of Himalayan cedar (Cedrus deodara) and neoza pine (Pinus gerardiana) from 16 ecologically homogeneous moisture stressed settings in Kinnaur, western Indian Himalaya. The precipitation reconstruction revealed persistent long-term spring droughts from the 12th to early 16th century C.E. and pluvial from the late 16th century C.E. to recent decades. The late 15th and early 16th centuries (1490–1514 C.E.) displayed the driest episode, with precipitation being ∼15% lower than the long-term mean. The early 19th century (1820–1844 C.E.) was the wettest period of the past millennium, with mean precipitation ∼13% above the long-term mean. The reconstructed boreal spring precipitation from the western Himalaya revealed large-scale consistency with hydrological records from westerly dominated regions in Central Asia, indicating synoptic-scale changes in atmospheric circulation during the major part of the Medieval and Little Ice Age periods. Protracted droughts in Central Asia could have caused severe contraction of the regional economy, as indicated by striking coherence of reconstructed drought periods and historic social upheavals and invasions of India from Central and Western Asian invaders. Vulnerability to climatic extremes underpins the need to develop a better understanding of the temporal and spatial variability in regional hydroclimate in order to devise viable water resource management plans.
Keywords: Boreal spring precipitation reconstruction; Tree rings; Drought; Human history; Western Himalaya; India; Central Asia

Borucki, Christoph: Franken : Nürnberg, Würzburg, Bamberg / Autoren: Christoph Borucki, Nadine Luck. 14. Auflage, komplett überarbeitet und neu gestaltet. Ostfildern 2021 - Hübner, Thomas (2022)

Böttner, Bastian: 100 Erlebnis-Ausflüge für Familien und Entdecker : Freizeitspaß in Franken für jedes Wetter und das ganze Jahr / Bastian Böttner ; Markus Raupach. Aktualisierte Neuaufl. Nürnberg 2022 - Hübner, Thomas (2023)

Böttner, Bastian: 100 Erlebnis-Ausflüge für Familien und Entdecker : Freizeitspaß in Franken für jedes Wetter und das ganze Jahr / Bastian Böttner ; Markus Raupach. Nürnberg 2020 - Hübner, Thomas (2020)