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DOI	10.1029/2020GL087108
	On the Spatiotemporal Diversity of Atlantic Niño and Associated Rainfall Variability Over West Africa and South America
	Vallès-Casanova I.; Lee S.-K.; Foltz G.R.; Pelegrí J.L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:8
英文摘要	The spatiotemporal evolutions of equatorial Atlantic sea surface temperature anomalies (SSTAs) during Atlantic Niño events and the associated climate impacts on the surrounding continents are extremely diverse. In this study, we construct longitude-time maps of equatorial Atlantic SSTAs for each observed Atlantic Niño event during 1948–2019 and perform a spatiotemporal empirical orthogonal function analysis to identify the four most frequently recurring Atlantic Niño varieties. The first two contrast the timing of dissipation (early terminating vs. persistent) and the other two the timing of onset (early onset vs. late onset). Largely consistent with the differences in the timings of onset and dissipation, these four varieties display remarkable differences in rainfall response over West Africa and South America. Most of the varieties are subject to onset mechanisms that involve preconditioning in boreal spring by either the Atlantic meridional mode or Pacific El Niño, while for the late onset variability there is no clear source of external forcing. © 2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	Oceanography; Orthogonal functions; Surface waters; Atlantic sea; Boreal Spring; Climate impacts; Empirical orthogonal function analysis; External forcing; Rainfall variability; South America; Spatiotemporal evolution; Rain; air-sea interaction; climate effect; climate forcing; dissipation; El Nino; empirical orthogonal function analysis; extreme event; rainfall; sea surface temperature; spatiotemporal analysis; temperature anomaly; Atlantic Ocean; Atlantic Ocean (Equatorial); South America; West Africa
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/170442
作者单位	Institut de Ciències del Mar, CSIC, Unidad Asociada ULPGC-CSIC, Barcelona, Spain; Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, United States
推荐引用方式 GB/T 7714	Vallès-Casanova I.,Lee S.-K.,Foltz G.R.,et al. On the Spatiotemporal Diversity of Atlantic Niño and Associated Rainfall Variability Over West Africa and South America[J],2020,47(8).
APA	Vallès-Casanova I.,Lee S.-K.,Foltz G.R.,&Pelegrí J.L..(2020).On the Spatiotemporal Diversity of Atlantic Niño and Associated Rainfall Variability Over West Africa and South America.Geophysical Research Letters,47(8).
MLA	Vallès-Casanova I.,et al."On the Spatiotemporal Diversity of Atlantic Niño and Associated Rainfall Variability Over West Africa and South America".Geophysical Research Letters 47.8(2020).