NDLI: Chinese deserts and sand fields in Last Glacial Maximum and Holocene Optimum

Content Provider	Springer Nature Link
Author	Lu, HuaYu Yi, ShuangWen Xu, ZhiWei Zhou, YaLi Zeng, Lin Zhu, FangYing Feng, Han Dong, LiNa Zhuo, HaiXin Yu, KaiFeng Mason, Joseph Wang, XiaoYong Chen, YingYong Lu, Qi Wu, Bo Dong, ZhiBao Qu, JianJun Wang, XunMing Guo, ZhengTang
Copyright Year	2013
Abstract	The Last Glacial Maximum (LGM, c. 26-16 ka) and the Holocene Optimum (HO, c. 9-5 ka) were characterized by cold-dry and warm-wet climates respectively in the recently geological Earth. How Chinese deserts and sand fields responded to these distinctive climatic changes is still not clear, however. To reconstruct environments of the deserts and sand fields during the LGM and HO is helpful to understand the forcing mechanisms of environment change in this arid region, and to test paleoclimatic modeling results. Through our long-term field and laboratory investigations, 400 optically stimulated luminescence (OSL) ages and more than 100 depositional records in the Chinese deserts and sand fields were obtained; on the basis of these data, we reconstruct spatial distributions of the deserts and sand fields during the LGM and HO. Our results show that the sand fields of Mu Us, Hunshandake, Horqin and Hulun Buir in northern and northeastern China had expanded 25%, 37%, 38% and 270%, respectively, during the LGM; the sand fields of Gonghe in the northeastern Qinghai-Tibetan Plateau had expanded 20%, and the deserts of Badain Jaran, Tengger in central northern China had expanded 39% and 29% separately during the LGM; the deserts of Taklimakan, Gurbantünggüt and Kumtag in northwestern China had expanded 10%–20% respectively, compared to their modern areas. On the other hand, all of the sand fields were nearly completely covered by vegetation during the HO; the deserts in northwestern and central northern China were reduced by around 5%–20% in area during this time. Lakes in this arid region were probably expanded during the HO but this conclusion needs more investigation. Compared with the geological distributions of deserts and sand fields, human activity has clearly changed (expanded) the area of active sand dunes at the present time. Our observations show that environmental conditions of Chinese deserts and sand fields are controlled by regional climate together with human activity.
Starting Page	2775
Ending Page	2783
Page Count	9
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	58
Issue Number	23
e-ISSN	18619541
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-20
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	deserts and sand fields in China Last Glacial Maximum Holocene Optimum OSL dating active sand dunes Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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