气候变化领域集成服务门户(CCPortal): Southward Shift of Westerlies Intensifies the East Asian Early Summer Rainband Following El Niño

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DOI	10.1029/2020GL088631
	Southward Shift of Westerlies Intensifies the East Asian Early Summer Rainband Following El Niño
	Kong W.; Chiang J.C.H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	An intensification of East Asian rainfall usually occurs in summers following El Niño. We propose that this teleconnection is mediated via the westerlies impinging on the Tibetan Plateau, through El Niño's control on tropical tropospheric temperature. This is distinct from previous studies that attribute the El Niño's influence to changes in the western Pacific subtropical anticyclone. The warming in the eastern equatorial Pacific leads to uniform warming of the entire tropical troposphere, which sharpens the temperature gradient between the tropics and the subtropics and shifts the westerlies southward. The westerlies impinge over the Tibetan Plateau for longer and, through interaction with the topography, induce intense and persistent extratropical northerlies downstream of the plateau that in turn intensifies the East Asian rainband. The rainband has previously been shown to intensify in a similar manner in a warming climate, suggesting that the El Niño response provides an analog for future changes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Topography; Troposphere; Eastern equatorial Pacific; Subtropical anticyclone; Teleconnections; Tibetan Plateau; Tropical troposphere; Tropospheric temperature; Warming climate; Western Pacific; Tropics; anticyclone; extratropical environment; precipitation intensity; rainband; rainfall; summer; teleconnection; temperature gradient; topography; troposphere; warming; westerly; Pacific Ocean; Pacific Ocean (Subtropical); Qinghai-Xizang Plateau
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169846
作者单位	Department of Geography and Berkeley Atmospheric Science Center, University of California, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Kong W.,Chiang J.C.H.. Southward Shift of Westerlies Intensifies the East Asian Early Summer Rainband Following El Niño[J],2020,47(17).
APA	Kong W.,&Chiang J.C.H..(2020).Southward Shift of Westerlies Intensifies the East Asian Early Summer Rainband Following El Niño.Geophysical Research Letters,47(17).
MLA	Kong W.,et al."Southward Shift of Westerlies Intensifies the East Asian Early Summer Rainband Following El Niño".Geophysical Research Letters 47.17(2020).