An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon

ISL OpenIR > 青海盐湖研究所知识仓储

	An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon
	Han, Wenxia 1,2,3,4; Fang, Xiaomin 3,4; Berger, Andre 5,6; Yin, Qiuzhen 5,6
	2011-12-22
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
卷号	116 期号:*
摘要	The Chinese loess-paleosol sequences have led to a great understanding of the evolution of the East Asian monsoon (EAM) in the Quaternary. However, evolution of the EAM in the late Miocene and Pliocene is quite blurry, hindering our understanding of the mechanisms driving the EAM. Thus, we obtained high-resolution grain size records of 8.1 Ma from the thickest eolian Red Clay sequence at Chaona on the Chinese central Loess Plateau, and astronomically tuned the grain size records to the orbital variation with a time resolution of 1.5 ka to 5.8 ka. The variability of coarse size fraction, a recognized proxy for the East Asian winter monsoon (EAWM), indicates a persistent but stepwise intensification of the EAWM at ca. 5.5 Ma, 3.6 Ma, 2.6 Ma and 1 Ma. Filtering of this proxy record at 100, 41, and 21 ka bands was conducted to trace the evolution of the EAWM in a frequency domain over 8.1 Ma. Temporal variations of these three cycles show a remarkable simultaneous enhancement at ca. 5.5 Ma, indicating a synchronous intensification of high and low latitude signals in the EAWM record. We suggest that the closure of Panama Seaway to form the North Atlantic thermohaline circulation and the high latitude cooling during this time might collectively trigger such a response.
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/363002/1847
专题	青海盐湖研究所知识仓储
作者单位	1.Chinese Acad Sci, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 3.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China 5.Catholic Univ Louvain, Inst Astron & Geophys G Lemaitre, B-1348 Louvain, Belgium 6.Catholic Univ Louvain, Ctr Earth & Climate Res, B-1348 Louvain, Belgium
推荐引用方式 GB/T 7714	Han, Wenxia,Fang, Xiaomin,Berger, Andre,et al. An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2011,116(*).
APA	Han, Wenxia,Fang, Xiaomin,Berger, Andre,&Yin, Qiuzhen.(2011).An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,116(*).
MLA	Han, Wenxia,et al."An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 116.*(2011).

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