DOI: 10.1002/2013GL058964
论文题名: What is responsible for the strong observed asymmetry in teleconnections between El Niño and la Niña?
作者: Zhang T. ; Perlwitz J. ; Hoerling M.P.
刊名: Geophysical Research Letters
ISSN: 0094-10395
EISSN: 1944-10126
出版年: 2014
卷: 41, 期: 3 起始页码: 1019
结束页码: 1025
语种: 英语
英文关键词: Asymmetry
; ENSO teleconnections
; North America
; sample variability
; surface climate
; symmetry
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Crystal symmetry
; Asymmetric component
; Asymmetry
; Fundamental properties
; North America
; Sea surface temperature (SST)
; Surface climate
; Surface temperatures
; Teleconnections
; Climatology
; El Nino-Southern Oscillation
; forecasting method
; La Nina
; sea surface temperature
; teleconnection
; troposphere
; North America
英文摘要: A large asymmetric component (El Niño + La Niña) of El Niño-Southern Oscillation (ENSO)-related teleconnections over North America is found during 1984-2009 that is comparable in strength to the commonly studied symmetric component (El Niño - La Niña). Climate reforecasts spanning this period are diagnosed in order to understand the processes responsible for the observed asymmetry. It is confirmed that an asymmetric component is indeed a fundamental property of atmospheric responses to recent ENSO forcing. Each and every composite of a 16-member reforecast ensemble has appreciable asymmetry in tropical Pacific rainfall, upper tropospheric Pacific-North American circulation patterns, and contiguous U.S. surface temperatures. There is considerable sampling variability in the magnitude of this asymmetric component among individual reforecast composites. We argue therefore that the true sea surface temperature boundary-forced signal of ENSO teleconnections is likely composed of a symmetric component having greater magnitude than its asymmetric component, though the latter is an important property of how ENSO affects North American climate. Key Points Asymmetry is a fundamental property of atmospheric responses to recent ENSO Strong observed asymmetry in ENSO teleconnections is from sampling variability True ENSO symmetric component is likely greater than asymmetric component ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893648364&doi=10.1002%2f2013GL058964&partnerID=40&md5=d467b88c0acd1c0963e36b87c87198b6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7659
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Zhang T.,Perlwitz J.,Hoerling M.P.. What is responsible for the strong observed asymmetry in teleconnections between El Niño and la Niña?[J]. Geophysical Research Letters,2014-01-01,41(3).