IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau
Yu, LP (Yu, LuPeng)[ 1,2,3 ]; Lai, ZP (Lai, ZhongPing)[ 1,3,4 ]
2014-05-15
Source PublicationQUATERNARY RESEARCH
Volume81Issue:3Pages:488-499
Subtype期刊论文
Abstract

Paleoclimatic reconstruction based on aeolian sediments in the eastern Qaidam Basin (QB) has been hindered by the limited chronological data. Here we present 61 Optically Stimulated Luminescence (OSL) ages. On the basis of these OSL ages and the lithologic stratigraphy, we propose the 'effective moisture index (EMI)' for aeolian sediments to reconstruct the effective moisture change. Based on the EMI from twelve sections, the effective moisture change, moisture sources and relevant mechanisms for paleoclimatic change in the eastern QB are discussed. The results indicate that (1) aeolian deposition started at least before 12.4 +/- 0.7 ka during the deglaciation, the paleosols developed at the early and mid-Holocene, and aeolian sand and loess accumulated at mid- and late Holocene; (2) effective moisture history was: hyper-arid at 12.8-11.6 ka, humid and variable at 11.6-8.3 ka, moderately humid and stable at 83-3.5 ka, and increasingly arid at 3.5-0 ka; (3) the effective moisture change was mainly controlled by the Asian summer monsoon (ASM), which mainly followed the change of Northern Hemispheric summer insolation, and the westerlies strengthened and increased the aridity in the QB when the ASM shrank.

KeywordOsl Dating Aeolian Activity Holocene Climate Change Asian Summer Monsoon Qaidam Basin Qinghai–tibetan Plateau
DOI10.1016/j.yqres.2013.09.006
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9839
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorLai, ZP (Lai, ZhongPing)[ 1,3,4 ]
Affiliation1.CAS Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 81000, China;
2.Qinghai Geological Survey Institute, Xining 810012, China;
3.State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China
Recommended Citation
GB/T 7714
Yu, LP ,Lai, ZP . Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau[J]. QUATERNARY RESEARCH,2014,81(3):488-499.
APA Yu, LP ,&Lai, ZP .(2014).Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau.QUATERNARY RESEARCH,81(3),488-499.
MLA Yu, LP ,et al."Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau".QUATERNARY RESEARCH 81.3(2014):488-499.
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