Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau

ISL OpenIR > 青海盐湖研究所知识仓储

	Holocene climate change inferred from stratigraphy and OSL chronology of aeolian sediments in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau
	Yu, LuPeng 1,2,3; Lai, ZhongPing1,3,4
	2014-05-01
发表期刊	QUATERNARY RESEARCH
卷号	81 期号:3 页码:488-499
关键词	Osl Dating Aeolian Activity Holocene Climate Change Asian Summer Monsoon Qaidam Basin Qinghai-tibetan Plateau
摘要	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. (C) 2013 University of Washington. Published by Elsevier Inc. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6384
专题	青海盐湖研究所知识仓储盐湖地质与环境实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Iakes, CAS Key Lab Salt Lake Resources & Chem, Xining 81000, Peoples R China 2.Qinghai Geol Survey Inst, Xining 810012, Peoples R China 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Ciyospher Sci, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
推荐引用方式 GB/T 7714	Yu, LuPeng,Lai, ZhongPing. 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, LuPeng,&Lai, ZhongPing.(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, LuPeng,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.