气候变化领域集成服务门户(CCPortal): Paleogeography control of Indian monsoon intensification and expansion at 41 Ma

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DOI	10.1016/j.scib.2021.07.023
	Paleogeography control of Indian monsoon intensification and expansion at 41 Ma
	Fang X.; Yan M.; Zhang W.; Nie J.; Han W.; Wu F.; Song C.; Zhang T.; Zan J.; Yang Y.
发表日期	2021
ISSN	20959273
英文摘要	As a crucial part of the Asian monsoon stretching from tropical India to temperate East Asia, the Indian monsoon (IM) contributes predominant precipitation over Asian continent. However, our understanding of IM's onset, development and the underlying driving mechanisms is limited. Increasing evidence indicates that the IM began in the Eocene or even the Paleocene and was unexceptionally linked to the early rise of the Tibetan Plateau (TP). These were challenged by the heterogeneous and diachronous uplift of the TP and all the reported records were confined to tropical zone under tropical monsoon driven by the Intertropical Convergence Zone (ITCZ) that is irrelevant to the TP. Therefore, reliable paleoclimatic records from the extra-tropical IM region is crucial to reveal how the tropical IM expanded to subtropical and temperate zones and what driving factors might be related to it. Here we present robust Eocene paleoenvironmental records from central Yunnan (~26°N) in subtropical East Asia. The multiproxy results of two sites demonstrate a consistent sudden switch from a dry environment in the early Eocene to a seasonally wet one at 41 Ma, suggesting a jump of the tropical IM to the southern subtropical zone at 41 Ma. The full collision of India with Asia, and the resulting changes in paleogeography at 41 Ma (closure of the Neotethys sea, retreat of the Paratethys seas, fast northward movement of the southern margin of the TP and rise of the central TP), aided by synchronous Antarctic cooling, might have worked together to drive the IM enhancement and northward expansion. © 2021
关键词	Asia paleogeography Driven factors and forcings Eocene paleoenvironment Indian tropical monsoon Subtropical monsoon onset
英文关键词	Expansion; Tropics; Asia paleogeography; Asian monsoon; Driven factor and forcing; East Asia; Eocene paleoenvironment; Indian monsoon; Indian tropical monsoon; Paleogeography; Subtropical monsoon onset; Tibetan Plateau; Atmospheric thermodynamics
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207393
作者单位	State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment, Institute of Tibetan Plateau Research (TPESRE), Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Western China's Environments of Ministry of Education, Lanzhou University, Lanzhou, 730000, China; Shandong Provincial Key Laboratory of Water and Soil Conservation & Environmental Protection, School of Resource and Environmental Sciences, Linyi University, Linyi, 276000, China; School of Earth Sciences & Key Laboratory of Western China's Mineral Resources of Gansu Province, Lanzhou University, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Fang X.,Yan M.,Zhang W.,et al. Paleogeography control of Indian monsoon intensification and expansion at 41 Ma[J],2021.
APA	Fang X..,Yan M..,Zhang W..,Nie J..,Han W..,...&Yang Y..(2021).Paleogeography control of Indian monsoon intensification and expansion at 41 Ma.Science Bulletin.
MLA	Fang X.,et al."Paleogeography control of Indian monsoon intensification and expansion at 41 Ma".Science Bulletin (2021).