DOI: 10.1175/JCLI-D-14-00724.1
Scopus记录号: 2-s2.0-84942862430
论文题名: The annual-cycle modulation of meridional asymmetry in ENSO's atmospheric response and its dependence on ENSO zonal structure
作者: Zhang W. ; Li H. ; Jin F.-F. ; Stuecker M.F. ; Turner A.G. ; Klingaman N.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 14 起始页码: 5795
结束页码: 5812
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric structure
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Climatology
; Nickel
; Surface waters
; Atmosphere-ocean interactions
; Atmospheric response
; Eastern pacific
; ENSO
; Sea surface temperature anomalies
; Southern oscillation
; Western North Pacific
; Zonal structure
; Oceanography
; air-sea interaction
; annual cycle
; climate effect
; climatology
; El Nino-Southern Oscillation
; La Nina
; sea surface temperature
; temperature anomaly
; wind
; Far East
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (North)
英文摘要: Previous studies documented that a distinct southward shift of central Pacific low-level wind anomalies occurring during theENSOdecaying phase is caused by an interaction between thewestern Pacific annual cycle and El Niño-Southern Oscillation (ENSO) variability. The present study finds that the meridional movement of the central Pacificwind anomalies appears only during traditional eastern Pacific El Niño (EP ElNiño) events rather than in central Pacific El Niño (CP El Niño) events in which sea surface temperature (SST) anomalies are confined to the central Pacific. The zonal structure of ENSO-related SST anomalies therefore has an important effect on meridional asymmetry in the associated atmospheric response and itsmodulation by the annual cycle. In contrast toEPEl Niño events, the SST anomalies ofCPElNiño events extend farther west toward thewarmpool region with its climatologicalwarm SSTs. In thewarm pool region, relatively small SSTanomalies are thus able to excite convection anomalies on both sides of the equator, even with a meridionally asymmetric SST background state. Therefore, almost meridionally symmetric precipitation and wind anomalies are observed over the central Pacific during the decaying phase of CP El Niño events. The SST anomaly pattern of La Niña events is similar to CP El Niño events with a reversed sign. Accordingly, no distinct southward displacement of the atmospheric response occurs over the central Pacific during the La Niña decaying phase. These results have important implications for ENSOclimate impacts over EastAsia, since the anomalous low-level anticyclone over the western North Pacific is an integral part of the annual cycle-modulated ENSO response. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50702
Appears in Collections: 气候变化事实与影响
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作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Department of Atmospheric Sciences, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI, United States; NCAS-Climate, Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Zhang W.,Li H.,Jin F.-F.,et al. The annual-cycle modulation of meridional asymmetry in ENSO's atmospheric response and its dependence on ENSO zonal structure[J]. Journal of Climate,2015-01-01,28(14)