气候变化领域集成服务门户(CCPortal): Late Plio-Pleistocene humidity fluctuations in the western Qaidam Basin (NE Tibetan Plateau) revealed by an integrated magnetic-palynological record from lacustrine sediments

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DOI	10.1016/j.yqres.2015.09.009
	Late Plio-Pleistocene humidity fluctuations in the western Qaidam Basin (NE Tibetan Plateau) revealed by an integrated magnetic-palynological record from lacustrine sediments
	Herb, Christian; Koutsodendris, Andreas; Zhang, Weilin; Appel, Erwin; Fang, Xiaomin; Voigt, Silke; Pross, Joerg
通讯作者	Appel, E (通讯作者)
发表日期	2015
ISSN	0033-5894
EISSN	1096-0287
起始页码	457
结束页码	466
卷号	84 期号:3
英文摘要	Deciphering the climatic evolution of the Tibetan Plateau region during the Plio-Pleistocene is hampered by the lack of continuous archives and proxy datasets indicative of moisture availability. Here we assess the suitability of magnetic susceptibility (chi) measured on lacustrine sediments as a paleohydrological proxy based on material from drill core SG-1 (2.69-0.08 Ma) from the western Qaidam Basin. Our assessment is based on directly comparing chi with the Artemisia/Chenopodiaceae (A/C) pollen ratio, which represents a sensitive, well-established proxy for moisture changes in arid environments. We find that higher and lower chi values represent drier and less dry conditions, respectively, for the Late Plio-Pleistocene. Less dry phases were likely caused by transiently increased influence of the westerlies and/or decreased influence of the Asian winter monsoon on glacial-interglacial time scales. An exception from this relationship is the interval between similar to 1.9 and 1.3 Ma, when the SG-1 chi record exhibits a 54 ka cyclicity, which may indicate summer monsoon influence on the Qaidam Basin during that time. After similar to 1.3 Ma, the summer monsoon influence may have ceased due to global cooling, with the consequence that the Asian winter monsoon and the westerlies exerted a stronger control on the hydrology of the Qaidam Basin. (C) 2015 University of Washington. Published by Elsevier Inc. All rights reserved.
关键词	CENOZOIC TECTONIC EVOLUTION LOESS-PALEOSOL SEQUENCES SOUTH CHINA SEA DRILL CORE SG-1 CLIMATE-CHANGE ASIAN MONSOON GRAIN-SIZE PROGRESSIVE EVOLUTION WINTER MONSOON LATE EOCENE
英文关键词	Magnetic proxies; Pollen; Lacustrine sediments; Paleoclimate; Monsoon; Westerlies; Qaidam Basin; Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000367278200015
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/258561
推荐引用方式 GB/T 7714	Herb, Christian,Koutsodendris, Andreas,Zhang, Weilin,et al. Late Plio-Pleistocene humidity fluctuations in the western Qaidam Basin (NE Tibetan Plateau) revealed by an integrated magnetic-palynological record from lacustrine sediments[J]. 中国科学院青藏高原研究所,2015,84(3).
APA	Herb, Christian.,Koutsodendris, Andreas.,Zhang, Weilin.,Appel, Erwin.,Fang, Xiaomin.,...&Pross, Joerg.(2015).Late Plio-Pleistocene humidity fluctuations in the western Qaidam Basin (NE Tibetan Plateau) revealed by an integrated magnetic-palynological record from lacustrine sediments.QUATERNARY RESEARCH,84(3).
MLA	Herb, Christian,et al."Late Plio-Pleistocene humidity fluctuations in the western Qaidam Basin (NE Tibetan Plateau) revealed by an integrated magnetic-palynological record from lacustrine sediments".QUATERNARY RESEARCH 84.3(2015).