Glazialmorphologische und dendrochronologische Untersuchungen neuzeitlicher Eisrandlagen Ost- und Südtibets

Bräuning A, Lehmkuhl F (1996)


Publication Language: German

Publication Type: Journal article

Publication year: 1996

Journal

Book Volume: 50

Pages Range: 341-359

Journal Issue: 4

Open Access Link: http://www.jstor.org/stable/25646855?seq=1#page_scan_tab_contents

Abstract

Geomorphological and dendrochronological investigations of recent glacier fluctuations in eastern and southern Tibet Investigations of glacier forefields at two sites in eastern and southern Tibet (Chola Shan and Nyainqentanglha Shan, see Fig. 1), show four different ice margins of recent glaciation (I to IV) and one older glacial stage (V). The poor weathering and sharp relief of the moraines, together with the low degree of soil development and vegetation cover, allow the younger phases (I to IV) to be assigned to the global event of the Little Ice Age. Similar moraines, with only sparse vegetation, can also be observed in other regions of the Tibetan plateau. The moraine ridges I to III are retreat phases of the maximum advance IV and can be dated by dendrochronology to the end of the 19th and early 20th century. A minimum age for stage IV is 1788. Phases with reduced tree growth can be correlated with cooler summer conditions and, to some extent, with enhanced glacier activity. The Little Ice Age event coincides with cooling periods in China and Tibet in the 14th to 19th century. In the Nianbaoyeze (eastern Tibet), a fossil soil with a radiocarbon age of 1385 ? 170 BP indicates a maximum age for stage IV. The older, densely vegetated moraine stage V might cor respond to the so called Neoglacial period beginning about 3000 BP.

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APA:

Bräuning, A., & Lehmkuhl, F. (1996). Glazialmorphologische und dendrochronologische Untersuchungen neuzeitlicher Eisrandlagen Ost- und Südtibets. Erdkunde, 50(4), 341-359.

MLA:

Bräuning, Achim, and Frank Lehmkuhl. "Glazialmorphologische und dendrochronologische Untersuchungen neuzeitlicher Eisrandlagen Ost- und Südtibets." Erdkunde 50.4 (1996): 341-359.

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