气候变化领域集成服务门户(CCPortal): Indian monsoon derailed by a North Atlantic wavetrain

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DOI	10.1126/science.aay6043
	Indian monsoon derailed by a North Atlantic wavetrain
	Borah P.J.; Venugopal V.; Sukhatme J.; Muddebihal P.; Goswami B.N.
发表日期	2020
ISSN	0036-8075
起始页码	1335
结束页码	1338
卷号	370 期号:6522
英文摘要	The forecast of Indian monsoon droughts has been predicated on the notion of a season-long rainfall deficit linked to a warm equatorial Pacific. Here we show that nearly half of all droughts over the past century differ from this paradigm in that they (i) occur when Pacific temperatures are near-neutral and (ii) are subseasonal phenomena, characterized by an abrupt decline in late-season rainfall. This severe subseasonal rainfall deficit can be associated with a Rossby wave from mid-latitudes. Specifically, we find that the interaction of upper-level winds with an episodic North Atlantic vorticity anomaly results in a wavetrain that curves toward East Asia, disrupting the monsoon. This atmospheric teleconnection offers an avenue for improved predictability of droughts, especially in the absence of telltale signatures in the Pacific. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	hot water; rain; air-sea interaction; drought; midlatitude environment; monsoon; rainfall; Rossby wave; teleconnection; Article; Asia; atmosphere; drought; El Nino; latitude; meteorological phenomena; monsoon climate; North Atlantic gyre; prediction; priority journal; sea surface temperature; seasonal variation; tropics; vorticity; wind; Atlantic Ocean; Atlantic Ocean (North); India; Pacific Ocean
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243096
作者单位	Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, 560012, India; Divecha Centre for Climate Change, Indian Institute of Science, Bangalore, 560012, India; Interdisciplinary Centre for Water Research, Indian Institute of Science, Bangalore, 560012, India; Department of Physics, Cotton University, Guwahati, 781001, India
推荐引用方式 GB/T 7714	Borah P.J.,Venugopal V.,Sukhatme J.,et al. Indian monsoon derailed by a North Atlantic wavetrain[J],2020,370(6522).
APA	Borah P.J.,Venugopal V.,Sukhatme J.,Muddebihal P.,&Goswami B.N..(2020).Indian monsoon derailed by a North Atlantic wavetrain.Science,370(6522).
MLA	Borah P.J.,et al."Indian monsoon derailed by a North Atlantic wavetrain".Science 370.6522(2020).