气候变化领域集成服务门户(CCPortal): An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon

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DOI	10.1029/2011JD016237
	An astronomically tuned 8.1 Ma eolian record from the Chinese Loess Plateau and its implication on the evolution of Asian monsoon
	Han, Wenxia; Fang, Xiaomin; Berger, Andre; Yin, Qiuzhen
通讯作者	Han, WX (通讯作者)
发表日期	2011
ISSN	2169-897X
EISSN	2169-8996
卷号	116
英文摘要	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.
关键词	RED CLAY DEPOSITS GRAIN-SIZE LATE MIOCENE LATE NEOGENE DELTA-O-18 RECORD AUTONOMOUS REGION WINTER MONSOON NORTH-ATLANTIC POLLEN RECORD ICE SHEETS
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000298495700002
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257884
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]. 中国科学院青藏高原研究所,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).