Drought signals in tree-ring stable oxygen isotope series of Qilian juniper from the arid northeastern Tibetan Plateau
Qin C, Yang B, Bräuning A, Grießinger J, Wernicke J (2015)
Publication Language: English
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Journal
Publisher: Elsevier
Book Volume: 125
Pages Range: 48-59
URI: http://www.sciencedirect.com/science/article/pii/S0921818114003257?np=y
DOI: 10.1016/j.gloplacha.2014.12.002
Abstract
For the mechanistic understanding of hydroclimate variability, stable oxygen isotopic ratios (δO) of tree-ring α-cellulose can play a key role in paleoclimatic research. On the north-east Tibetan Plateau (TP), a region particularly sensitive to climate change, there exists a distinct lack of δO research in tree-ring archives. The few currently existing tree-ring δO chronologies were obtained by pooling the wood material from the same year from different trees prior to preparation and analysis. Although this method is time and cost efficient, it might impede the analysis of changes within the internal variability of oxygen isotope signals and a deeper understanding of the resulting climate reconstruction. We selected five Qilian juniper (Sabina przewalskii Kom.) trees covering the period 1951-2011 on the north-east TP to investigate the climate signals contained in stable oxygen isotopic composition records obtained using single tree analysis. Although the inter-series correlation between the five individual δO series indicates a highly significant relationship (mean r=0.59, n=59, p=0.01), the five individual δO series show significantly differently mean values. We found significant negative correlations between drought/hydroclimatically triggered climate parameters (PDSI, precipitation) and each of the individual δO series. Spatial correlation maps indicate negative correlation of tree-ring δO and Indian Ocean sea surface temperatures, and inverse correlation patters of moisture conditions on the northern and southern TP. Our results provide a reference for future research on stable oxygen isotope/climate signals in the species S. przewalskii Kom.
Authors with CRIS profile
Achim Bräuning
Lehrstuhl für Geographie (Physische Geographie)
Jussi Grießinger
Institut für Geographie
Jakob Wernicke
Lehrstuhl für Geographie (Physische Geographie)
Involved external institutions
China (CN)How to cite
APA:
Qin, C., Yang, B., Bräuning, A., Grießinger, J., & Wernicke, J. (2015). Drought signals in tree-ring stable oxygen isotope series of Qilian juniper from the arid northeastern Tibetan Plateau. Global and Planetary Change, 125, 48-59. https://dx.doi.org/10.1016/j.gloplacha.2014.12.002
MLA:
Qin, Chun, et al. "Drought signals in tree-ring stable oxygen isotope series of Qilian juniper from the arid northeastern Tibetan Plateau." Global and Planetary Change 125 (2015): 48-59.
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