Lake Level and Climate Changes between 42,000 and 18,000 ¹⁴C yr B.P. in the Tengger Desert, Northwestern China

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• 作者：Zhang ; Hucai ; Wü ; nnemann ; Bernd ; Ma ; Yuzhen ; Peng ; Jinlan ; Pachur ; Hans-J. ; Li ; Jijun ; Qi ; Yuan ; et. al.
• 关键词：Tengger Desert ; climate change ; lake levels
• 刊名：Quaternary Research
• 出版年：2002
• 出版时间：July, 2002
• 年：2002
• 卷：58
• 期：1
• 页码：62-72
• 全文大小：685 K

文摘

Multiple lines of stratigraphic, geochemical, and fossil data suggest that fresh-mesohaline paleolakes were widespread in the Tengger Desert of northwestern China and underwent major fluctuations during the late Pleistocene. The paleolakes started to develop at ca. 42,000 ¹⁴C yr B.P. The lake levels were the highest between 35,000 and 22,000 ¹⁴C yr B.P., during which Megalake Tengger dominated the landscape. The climatic conditions at this time were unique for this area and have no modern analogue. After an episode of decline between 22,000 and 20,000 ¹⁴C yr B.P. and an episode of rebound between 20,000 and 18,600 ¹⁴C yr B.P., the paleolakes started to desiccate and completely disappeared around 18,000 ¹⁴C yr B.P. The environmental proxy data indicate that the Megalake Tengger formed under warm–humid climates. The reconstructed climatic variations appear to be correlative with the abrupt climatic events reconstructed for the North Atlantic.