气候变化领域集成服务门户(CCPortal): Six million years of magnetic grain-size records reveal that temperature and precipitation were decoupled on the Chinese Loess Plateau during similar to 4.5-2.6 Ma

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DOI	10.1016/j.yqres.2013.01.002
	Six million years of magnetic grain-size records reveal that temperature and precipitation were decoupled on the Chinese Loess Plateau during similar to 4.5-2.6 Ma
	Nie, Junsheng; Song, Yougui; King, John W.; Zhang, Rui; Fang, Xiaomin
通讯作者	Nie, JS (通讯作者)
发表日期	2013
ISSN	0033-5894
EISSN	1096-0287
起始页码	465
结束页码	470
卷号	79 期号:3
英文摘要	Magnetic grain-size variations have been used as sensitive paleoclimate proxies to investigate the evolution of the East Asian summer monsoon, but their relationship with temperature and precipitation is not entirely clear. Here we find that two magnetic grain-size proxy records (chi(ARM)/chi(LF) and chi(ARM)/SIRM, where chi(ARM), chi(LF) and SIRM are anhysteretic remanent magnetization susceptibility, magnetic susceptibility measured at 470 Hz and saturation isothermal remanent magnetization, respectively) of Chinese loess and red-clay sediments co-vary during the last 6 Ma, except between similar to 4.5 and 2.6 Ma, when these two records had opposite trends. We attribute this disparate behavior to the different responses of chi(ARM)/chi(AF) and chi(ARM)/SIRM to temperature and precipitation during similar to 4.5-2.6 Ma, when temperature and precipitation on the Chinese Loess Plateau were decoupled. A comparison of the loess and red-clay chi(ARM)/chi(LF) and chi(ARM)/SIRM records with the global ice-volume proxy records reveals that chi(ARM)/chi(LF) is more sensitive to temperature variations than chi(ARM)/SIRM. The results suggest that temperature on the Chinese Loess Plateau had a cooling trend from similar to 4.5 to similar to 2.6 Ma, whereas rainfall tended to increase. Our studies demonstrate that joint analysis of loess chi(ARM)/chi(LF) and chi(ARM)/SIRM records can reveal paleoclimatic information that cannot be revealed by a single parameter. (C) 2013 University of Washington. Published by Elsevier Inc. All rights reserved.
关键词	ENVIRONMENTAL MAGNETISM INSOLATION QUANTITIES ASIAN WINTER SUSCEPTIBILITY ENHANCEMENT TIMESCALE SEQUENCE CLIMATE MONSOON PALEOCLIMATE
英文关键词	Loess; Red clay; Chinese Loess Plateau; Pliocene; Quaternary; Rock magnetism
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000319308100015
来源期刊	QUATERNARY RESEARCH
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/258188
推荐引用方式 GB/T 7714	Nie, Junsheng,Song, Yougui,King, John W.,et al. Six million years of magnetic grain-size records reveal that temperature and precipitation were decoupled on the Chinese Loess Plateau during similar to 4.5-2.6 Ma[J]. 中国科学院青藏高原研究所,2013,79(3).
APA	Nie, Junsheng,Song, Yougui,King, John W.,Zhang, Rui,&Fang, Xiaomin.(2013).Six million years of magnetic grain-size records reveal that temperature and precipitation were decoupled on the Chinese Loess Plateau during similar to 4.5-2.6 Ma.QUATERNARY RESEARCH,79(3).
MLA	Nie, Junsheng,et al."Six million years of magnetic grain-size records reveal that temperature and precipitation were decoupled on the Chinese Loess Plateau during similar to 4.5-2.6 Ma".QUATERNARY RESEARCH 79.3(2013).