气候变化领域集成服务门户(CCPortal): Eccentricity forcing of East Asian monsoonal systems over the past 3 million years

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DOI	10.1073/pnas.2107055118
	Eccentricity forcing of East Asian monsoonal systems over the past 3 million years
	Liu C.; Nie J.; Li Z.; Qiao Q.; Abell J.T.; Wang F.; Xiao W.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:43
英文摘要	The East Asian summer monsoon and the precipitation it brings are relevant for millions of people. Because of the monsoon's importance, there has been a substantial amount of work attempting to describe the driving mechanisms behind its past variability. However, discrepancies exist, with speleothem-based East Asian monsoon reconstructions differing from those based on loess records from the Chinese Loess Plateau during the late Quaternary. The periodicity of wet and dry phases experienced by desert areas that lie on the periphery of the East Asian monsoon's influence offer another independent view of monsoonal variability. Here, we provide environmental records based on magnetic parameters for the last 3 million years from the Tengger Desert, China, one such marginal arid region. Our results reveal wet-dry cycles at a dominant frequency of 405 kiloyears, with drier intervals corresponding to eccentricity minima. These findings are consistent with previous reconstructions of East Asian summer and North African summer monsoon precipitation variability. Our records emphasize the dominant role of eccentricity in forcing East Asian monsoonal precipitation as well as monsoonal-derived environmental fluctuations experienced in peripheral desert areas. These results challenge the traditional view that high-latitude ice sheets are the primary driver of East Asian monsoon precipitation during the Quaternary based on Chinese loess records. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Eccentricity; Environmental magnetics; Monsoon; Tengger Desert
语种	英语
scopus关键词	article; China; desert; human; ice sheet; latitude; loess; magnetism; periodicity; precipitation; summer
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238609
作者单位	Key Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory of Western China's Environmental System, Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	Liu C.,Nie J.,Li Z.,et al. Eccentricity forcing of East Asian monsoonal systems over the past 3 million years[J],2021,118(43).
APA	Liu C..,Nie J..,Li Z..,Qiao Q..,Abell J.T..,...&Xiao W..(2021).Eccentricity forcing of East Asian monsoonal systems over the past 3 million years.Proceedings of the National Academy of Sciences of the United States of America,118(43).
MLA	Liu C.,et al."Eccentricity forcing of East Asian monsoonal systems over the past 3 million years".Proceedings of the National Academy of Sciences of the United States of America 118.43(2021).