气候变化领域集成服务门户(CCPortal): Abrupt changes in Indian summer monsoon strength during the last deglaciation and early Holocene based on stable isotope evidence from Lake Chenghai; southwest China

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DOI	10.1016/j.quascirev.2019.06.006
	Abrupt changes in Indian summer monsoon strength during the last deglaciation and early Holocene based on stable isotope evidence from Lake Chenghai; southwest China
	Sun W.; Zhang E.; Shulmeister J.; Bird M.I.; Chang J.; Shen J.
发表日期	2019
ISSN	0277-3791
起始页码	1
结束页码	9
卷号	218
英文摘要	Identifying variability and the mechanisms driving variability in the Indian summer monsoon (ISM) since the last deglaciation is critical for understanding past hydroclimatic change. In this study, we present an accelerator mass spectrometry radiocarbon dated record of δ18O variations in authigenic carbonates derived from Lake Chenghai in southwest China, a region that receives moisture mainly from the Indian Ocean. The δ18O values vary from −11.9 to +0.1‰, providing a detailed record of variations in ISM precipitation δ18O values, and lake hydrological balance. The record shows that the ISM generally strengthened in the post-glacial between 15.6 and 8.8 cal ka BP, but that three centennial to millennial-scale drought events were superimposed on the long-term trend. Drought events, as indicated by substantial positive shifts in δ18O value, occurred from 15.6 ± 0.2 to 14.4 ± 0.2, 12.5 ± 0.2 to 11.7 ± 0.2 and 10.1 ± 0.1 to 10.0 ± 0.1 cal ka BP, corresponding to the Heinrich 1, Younger Dryas, and Bond 7 cold events in the North Atlantic region, respectively. The timings of these droughts are suggested to be related to meltwater discharge into the North Atlantic. The weakened Atlantic Meridional Overturning circulation, which leads in turn to the southward migration of the intertropical convergence zone and cooling in the tropical Indian Ocean. © 2019 Elsevier Ltd
英文关键词	Authigenic carbonates; Bond cold event; Heinrich 1; Lake chenghai; Stable oxygen isotope; Younger dryas
语种	英语
scopus关键词	Atmospheric thermodynamics; Carbonates; Drought; Isotopes; Mass spectrometry; Oceanography; Accelerator mass spectrometry; Atlantic meridional overturning circulations; Authigenic carbonates; Heinrich 1; Intertropical convergence zone; Melt-water discharges; Stable oxygen isotopes; Younger Dryas; Lakes; authigenesis; carbonate system; Heinrich event; historical record; Holocene; hydrological modeling; last deglaciation; meridional circulation; monsoon; oxygen isotope; paleoclimate; radiocarbon dating; stable isotope; summer; Younger Dryas; Atlantic Ocean; Atlantic Ocean (North); Chenghai Lake; China; Indian Ocean; Indian Ocean (Tropical); Yunnan
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151863
作者单位	State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Science, Xian, 710061, China; School of Earth and Environmental Sciences, The University of Queensland, St Lucia, Brisbane, Qld 4072, Australia; ARC Centre of Excellence for Australian Biodiversity and Heritage, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia; College of Science and Engineering, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia
推荐引用方式 GB/T 7714	Sun W.,Zhang E.,Shulmeister J.,et al. Abrupt changes in Indian summer monsoon strength during the last deglaciation and early Holocene based on stable isotope evidence from Lake Chenghai; southwest China[J],2019,218.
APA	Sun W.,Zhang E.,Shulmeister J.,Bird M.I.,Chang J.,&Shen J..(2019).Abrupt changes in Indian summer monsoon strength during the last deglaciation and early Holocene based on stable isotope evidence from Lake Chenghai; southwest China.Quaternary Science Reviews,218.
MLA	Sun W.,et al."Abrupt changes in Indian summer monsoon strength during the last deglaciation and early Holocene based on stable isotope evidence from Lake Chenghai; southwest China".Quaternary Science Reviews 218(2019).