气候变化领域集成服务门户(CCPortal): Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China

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DOI	10.1016/j.quascirev.2020.106749
	Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China
	Peng H.; Bao K.; Yuan L.; Uchida M.; Cai C.; Zhu Y.; Hong B.; Guo Q.; Ding H.; Yao H.; Hong Y.
发表日期	2021
ISSN	2773791
卷号	252
英文摘要	The mechanism of abrupt climate changes in east Asia since the last deglaciation remains poorly explored due to the low number of high-resolution geological archives. Here we present a major and trace element including rare-earth elements (REEs) analysis of a 6 m peat archive from the Hengduan Mountains to reconstruct the rapid changes in monsoonal climate since the last deglaciation. The physicochemical parameters and Ca/Mg ratio illustrated the ombrotrophic characterization of the Yuexi peat core over the last 8800 years. Abrupt increases in dust fluxes were identified during the Old Dryas (OD), the Younger Dryas (YD), and the 4.2 kyr cold event periods. The mineral dust flux remained quite stable and low during the middle Holocene. The lowest average dust deposition rate between 8800 and 5000 cal yr BP represents a baseline of long-term atmospheric dust flux in China. The Y/ΣREE, La/Yb, Y/Yb, Y/Er indicate that deserts in northwest China, the Loess Plateau, and Tibetan soils were the dominant dust sources to the Yuexi peatland. The comparison with global climatic records suggested a teleconnection between the climate change in southwest China and North Atlantic cooling events, which implies that the abrupt variation in dust fluxes was linked with Asian monsoons variations. Our results also reveal that increased human activities significantly contribute to the dust fluxes during the late Holocene. © 2020 Elsevier Ltd
英文关键词	Asian monsoon; Atmospheric dust; Last deglaciation; Peatland; Rare earth elements; Trace elements
语种	英语
scopus关键词	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158320
作者单位	State Key Laboratory of Environmental Geochemistry; Institute of Geochemistry; Chinese Academy of Sciences; 99 Lincheng Road West; Guiyang; Guizhou 550081; China; CAS Center for Excellence in Quaternary Science and Global Change; Xi'an; 710061; China; School of Geography; South China Normal University; Shipai Campus; Guangzhou; 510631; China; University of Chinese Academy of Sciences; Beijing; 100049; China; National Institute for Environmental Studies; Onogawa 16-2; Tsukuba; Ibaraki 305-0053; Japan; Guizhou Institute of Technology; Guiyang; Guizhou 550003; China
推荐引用方式 GB/T 7714	Peng H.,Bao K.,Yuan L.,et al. Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China[J],2021,252.
APA	Peng H..,Bao K..,Yuan L..,Uchida M..,Cai C..,...&Hong Y..(2021).Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China.,252.
MLA	Peng H.,et al."Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China".252(2021).