气候变化领域集成服务门户(CCPortal): Impact of ENSO-Like Tropical Pacific Decadal Variability on the Relative Frequency of El Niño and La Niña Events

CCPortal

DOI	10.1029/2019GL085832
	Impact of ENSO-Like Tropical Pacific Decadal Variability on the Relative Frequency of El Niño and La Niña Events
	Sun T.; Okumura Y.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Observational and modeling studies show that the relative frequency of El Niño and La Niña varies in association with El Niño–Southern Oscillation (ENSO)-like tropical Pacific decadal variability (TPDV), but the causality of the linkage remains unclear. This study presents evidence that ENSO-like TPDV affects the frequency of ENSO events, particularly of El Niño, through a set of climate model experiments. During the positive phase of TPDV, tropical Pacific warming relative to the Indian and Atlantic Oceans increases the occurrence of anomalous westerly winds over the western equatorial Pacific in late boreal winter-spring, triggering more El Niño and fewer La Niña events. The opposite happens for the negative TPDV phase. The La Niña frequency is also influenced by oceanic adjustments following El Niño, which tends to counteract the effect of wind changes. The mean state control of ENSO offers a potential opportunity for decadal predictions of climate extremes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric pressure; Climate models; Tropics; Climate dynamics; Climate system; decadal ocean variability; Decadal predictions; ENSO; Pacific decadal variabilities; Relative frequencies; Southern oscillation; Climatology; air-sea interaction; atmosphere-ocean coupling; climate modeling; climate variation; decadal variation; El Nino-Southern Oscillation; La Nina; sea surface temperature; westerly; Atlantic Ocean; Pacific Ocean; Pacific Ocean (Tropical)
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/170758
作者单位	Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Now at Environmental Defense Fund, Austin, TX, United States
推荐引用方式 GB/T 7714	Sun T.,Okumura Y.M.. Impact of ENSO-Like Tropical Pacific Decadal Variability on the Relative Frequency of El Niño and La Niña Events[J],2020,47(3).
APA	Sun T.,&Okumura Y.M..(2020).Impact of ENSO-Like Tropical Pacific Decadal Variability on the Relative Frequency of El Niño and La Niña Events.Geophysical Research Letters,47(3).
MLA	Sun T.,et al."Impact of ENSO-Like Tropical Pacific Decadal Variability on the Relative Frequency of El Niño and La Niña Events".Geophysical Research Letters 47.3(2020).