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Tibet forcing of mid-Pleistocene synchronous enhancement of East Asian winter and summer monsoons revealed by Chinese loess record
Han, Wenxia1,2; Fang, Xiaomin1; Berger, Andre3,4
2012-09-01
发表期刊QUATERNARY RESEARCH
卷号78期号:2页码:174-184
关键词Mid-pleistocene Climatic Transition Asian Monsoon Evolution Chinese Loess Plateau Astronomical Tuning Tibetan Plateau Uplift Forcing
摘要The mid-Pleistocene transition (MPT) of the global climate system, marked by a shift of previously dominant 41-ka cycles to lately dominant 100-ka cycles roughly in the mid-Pleistocene, is one of the fundamental enigma in the Quaternary climate evolution. The process and origin of the MPT remain of persistent interest and conjecture. Here we present high-resolution astronomically tuned magnetic susceptibility (MS) and grain-size records from a complete loess-paleosol sequence at Chaona on the central Chinese Loess Plateau. These two proxies are well-known sensitive indicators to the East Asian summer and winter monsoons, respectively. The records reveal a remarkable two-step simultaneous enhancement of the East Asian summer and winter monsoons at 0.9 Ma and 0.64 Ma, respectively, accompanied with an onset of a clear 100-ka cycle at 0.9 Ma and of a final, predominant 100-ka cycle starting at 0.64 Ma. The mid-Pleistocene stepwise rapid uplift of the Tibetan Plateau could be the mechanism driving the simultaneous enhancement of East Asian summer and winter monsoons and the shift of the periodicities during the kin by complex positive feedbacks. (c) 2012 University of Washington. Published by Elsevier Inc. All rights reserved.
语种英语
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文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/4485
专题青海盐湖研究所知识仓储
中国科学院青海盐湖研究所
作者单位1.Chinese Acad Sci, Inst Tibet Plateau Res, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
3.Catholic Univ Louvain, Inst Astron & Geophys G Lemaitre, B-1348 Louvain, Belgium
4.Catholic Univ Louvain, Ctr Earth & Climate Res, B-1348 Louvain, Belgium
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Han, Wenxia,Fang, Xiaomin,Berger, Andre. Tibet forcing of mid-Pleistocene synchronous enhancement of East Asian winter and summer monsoons revealed by Chinese loess record[J]. QUATERNARY RESEARCH,2012,78(2):174-184.
APA Han, Wenxia,Fang, Xiaomin,&Berger, Andre.(2012).Tibet forcing of mid-Pleistocene synchronous enhancement of East Asian winter and summer monsoons revealed by Chinese loess record.QUATERNARY RESEARCH,78(2),174-184.
MLA Han, Wenxia,et al."Tibet forcing of mid-Pleistocene synchronous enhancement of East Asian winter and summer monsoons revealed by Chinese loess record".QUATERNARY RESEARCH 78.2(2012):174-184.
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