气候变化领域集成服务门户(CCPortal): Interdecadal changes in the asymmetric impacts of ENSO on wintertime rainfall over China and atmospheric circulations over western North Pacific

CCPortal

DOI	10.1007/s00382-018-4282-4
	Interdecadal changes in the asymmetric impacts of ENSO on wintertime rainfall over China and atmospheric circulations over western North Pacific
	Gao R.; Zhang R.; Wen M.; Li T.
发表日期	2019
ISSN	0930-7575
起始页码	7525
结束页码	7536
卷号	52 期号:12
英文摘要	Based on data diagnoses, in this study the interdecadal changes in asymmetric impacts of ENSO on wintertime East Asian climate are investigated. It is found that the Pacific Decadal Oscillation (PDO) can significantly modulate the asymmetry in the responses of the East Asian climate to El Niño and La Niña events. In positive PDO phase the response is asymmetric with a strong anomalous anticyclone over western North Pacific (WNP) and significant positive rainfall anomalies over southern China during El Niño winters, but a weak anomalous cyclone over WNP and insignificant negative rainfall anomalies over southern China during La Niña winters. However, such asymmetric responses do not appear in negative PDO phase, with comparable amplitudes of anomalous circulations over WNP and rainfall over southern China in El Niño and La Niña winters. Further analyses reveal that the warm background of the tropical Pacific in positive PDO phase causes significant difference in the amplitudes of convection anomalies over tropical western Pacific, resulting in asymmetric responses of the WNP circulation and rainfall over southern China to El Niño and La Niña events. Nevertheless, the cold background in negative PDO phase reduces the amplitude difference between El Niño and La Niña winters. A comparable convection anomalies appear in tropical western Pacific in El Niño and La Niña winters and the asymmetric responses do not occur. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	East Asian wintertime climate; El Niño–Southern Oscillation; Pacific Decadal Oscillation
语种	英语
scopus关键词	air-sea interaction; asymmetry; convection; decadal variation; El Nino-Southern Oscillation; La Nina; Pacific Decadal Oscillation; rainfall; winter; China; Pacific Ocean; Pacific Ocean (North); Pacific Ocean (Tropical)
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/146274
作者单位	Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, No. 220 Handan Road, Shanghai, 200433, China; Guangzhou Central Weather Observatory, Guangzhou, 510080, China
推荐引用方式 GB/T 7714	Gao R.,Zhang R.,Wen M.,et al. Interdecadal changes in the asymmetric impacts of ENSO on wintertime rainfall over China and atmospheric circulations over western North Pacific[J],2019,52(12).
APA	Gao R.,Zhang R.,Wen M.,&Li T..(2019).Interdecadal changes in the asymmetric impacts of ENSO on wintertime rainfall over China and atmospheric circulations over western North Pacific.Climate Dynamics,52(12).
MLA	Gao R.,et al."Interdecadal changes in the asymmetric impacts of ENSO on wintertime rainfall over China and atmospheric circulations over western North Pacific".Climate Dynamics 52.12(2019).