气候变化领域集成服务门户(CCPortal): The salience of nonlinearities in the boreal winter response to ENSO: Arctic stratosphere and Europe

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DOI	10.1007/s00382-019-04805-1
	The salience of nonlinearities in the boreal winter response to ENSO: Arctic stratosphere and Europe
	Weinberger I.; Garfinkel C.I.; White I.P.; Oman L.D.
发表日期	2019
ISSN	0930-7575
起始页码	4591
结束页码	4610
卷号	53 期号:2020-07-08
英文摘要	The Arctic stratospheric response to El Niño (EN) and La Niña (LN) is evaluated in a 41 member ensemble of the period 1980 to 2009 in the Goddard Earth Observing System Chemistry-Climate Model. We consider whether the responses to EN and LN are equal in magnitude and opposite in sign, whether the responses to moderate and extreme events are proportionate, and if the response depends on whether sea surface temperature anomalies (SSTs) peak in the Eastern Pacific (EP) or Central Pacific (CP). There is no indication of any nonlinearities between EN and LN, though in ~ 15% of the ensemble members the stratospheric sudden warming (SSW) frequencies for EN and LN are similar, suggesting that a similar SSW frequency for EN and LN, as has occurred over the past ~ 60 years, can occur by chance. The response to extreme EN events is not proportionate to the amplitude of the underlying SST anomalies in spring. EP EN events preferentially increase zonal wavenumber 1 and decrease zonal wavenumber 2 as compared to CP EN events, however the zonal-mean Arctic stratospheric and subpolar surface response is generally little different between EP EN and CP EN once one accounts for the relative weakness of CP events. These differences between EP and CP events and between moderate and extreme EN events only emerge if at least 25 events are composited, however, due to the small signal-to-noise ratio, and hence these differences may be of little practical benefit. © 2019, The Author(s).
语种	英语
scopus关键词	El Nino; El Nino-Southern Oscillation; La Nina; sea surface temperature; stratosphere; sudden stratospheric warming; temperature anomaly; winter; Europe; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East)
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/145957
作者单位	The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel; NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Weinberger I.,Garfinkel C.I.,White I.P.,et al. The salience of nonlinearities in the boreal winter response to ENSO: Arctic stratosphere and Europe[J],2019,53(2020-07-08).
APA	Weinberger I.,Garfinkel C.I.,White I.P.,&Oman L.D..(2019).The salience of nonlinearities in the boreal winter response to ENSO: Arctic stratosphere and Europe.Climate Dynamics,53(2020-07-08).
MLA	Weinberger I.,et al."The salience of nonlinearities in the boreal winter response to ENSO: Arctic stratosphere and Europe".Climate Dynamics 53.2020-07-08(2019).