气候变化领域集成服务门户(CCPortal): Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling

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DOI	10.1007/s00382-020-05363-7
	Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling
	Wang Y.; Shen J.; Wang Y.; Liu X.; Cao X.; Herzschuh U.
发表日期	2020
ISSN	0930-7575
起始页码	1961
结束页码	1977
卷号	55
英文摘要	The evolution of the Indian Summer Monsoon (ISM) has been widely investigated and traditionally interpreted as consequences of orbital forcing change and the migration of the Intertropical Convergent Zone (ITCZ). The potential influence of sea-surface temperature (SST) on ISM variation at millennial time scales has been progressively proposed in recent studies. Towards a better understanding of Holocene evolution of ISM, especially the potential response to variations in SST, a 643 cm continuous sediment sequence covering the past 11.1 ka was recovered from Beihai Wetland in western Yunnan Plateau. Fossil pollen analysis revealed that evergreen broadleaved forest dominated the regional vegetation in the early Holocene, which represented a warm and humid period associated with strong ISM. Expansions of deciduous broadleaved forest and grassland from 5.2 cal. ka BP to the present, together with the appearance of abundant plant remains, indicate the formation of the wetland system. Ordination analysis of the pollen assemblages further confirmed the abrupt vegetation turnover at ca. 5.2 cal. ka BP, which is consistent with the abrupt decline in reconstructed mean annual precipitation (Pann, from ca. 1400 to 1100 mm), and indicates an abrupt decline in the summer monsoon. We performed a climate regime shift test on various records from the ISM domain and eastern Africa and found this phenomenon as well, which could not be explained by changes in solar insolation or the migration of the ITCZ. A mid-Holocene cooling was detected from the Indian Ocean, especially a decreased SST in the tropical Indian Ocean ca. 5.5 cal. ka BP. Cooling of the tropical Indian Ocean possibly caused the abrupt retreat of the summer monsoon by restraining the duration of the monsoonal season and the convergent process, which was supported by an abrupt monsoon decline based on results from a minimal concept model. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Holocene; Indian Summer Monsoon; Pollen; Sea-surface Temperature; Yunnan Plateau
语种	英语
scopus关键词	broad-leaved forest; cooling; grassland; Holocene; intertropical convergence zone; monsoon; orbital forcing; sea surface temperature; summer; Beihai; China; Guangxi Zhuangzu; Indian Ocean; Yunnan
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145326
作者单位	College of Resource Environment and Tourism, Capital Normal University, Beijing, 100048, China; School of Geography and Ocean Science, Nanjing University, Nanjing, 210093, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Alpine Paleoecology and Human Adaptation Group (ALPHA), Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Research Unit Potsdam, Potsdam, 14473, Germany; Institute of Earth and Environment Science, University of Potsdam, Potsdam, 14476, Germany; Institute of Biochemistry and Biology, University of Potsdam, Potsdam, 14476, Germany
推荐引用方式 GB/T 7714	Wang Y.,Shen J.,Wang Y.,et al. Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling[J],2020,55.
APA	Wang Y.,Shen J.,Wang Y.,Liu X.,Cao X.,&Herzschuh U..(2020).Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling.Climate Dynamics,55.
MLA	Wang Y.,et al."Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling".Climate Dynamics 55(2020).