文献类型：期刊文献

英文题名：Abrupt climate variability since the last deglaciation based on a high-resolution peat dust deposition record from southwest China

作者：Peng, Haijun Bao, Kunshan Yuan, Lingui Uchida, Masao Cai, Cheng Zhu, Yongxuan Hong, Bing Guo, Qian Ding, Hanwei Yao, Hu Hong, Yetang

第一作者：Peng, Haijun

通信作者：Hong, B[1];Bao, KS[2]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Guizhou, Peoples R China;[2]CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China;[3]South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[5]Natl Inst Environm Studies, Onogawa 16-2, Tsukuba, Ibaraki 3050053, Japan;[6]Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Guizhou, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Guizhou, Peoples R China;corresponding author), South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China.

年份：2021

卷号：252

外文期刊名：QUATERNARY SCIENCE REVIEWS

收录：;EI(收录号：20205109651068);Scopus(收录号：2-s2.0-85097656629);WOS:【SCI-EXPANDED(收录号:WOS:000604567600012)】；

基金：We thank Nathalie Fagel and another anonymous reviewer for valuable comments and suggestions. This research was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB40000000) and the National Nature Science Foundation of China (Grants Nos. 41971113, 41907288, and 41673119). H.P. was supported by the CAS "Light of West China" Program and the CAS Scholarship.

语种：英文

外文关键词：Atmospheric dust; Trace elements; Rare earth elements; Last deglaciation; Asian monsoon; Peatland

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/Sigma REE, 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. (C) 2020 Elsevier Ltd. All rights reserved.