DOI: 10.1002/2015GL063886
论文题名: Migration of atmospheric convection coupled with ocean currents pushes El Niño to extremes
作者: Kim W. ; Cai W. ; Kug J.-S.
刊名: Geophysical Research Letters
ISSN: 0094-9515
EISSN: 1944-9246
出版年: 2015
卷: 42, 期: 9 起始页码: 3583
结束页码: 3590
语种: 英语
英文关键词: asymmetry
; CMIP5
; El Niño
; ENSO
Scopus关键词: Advection
; Atmospheric pressure
; Atmospheric thermodynamics
; Climate models
; Climatology
; Natural convection
; Ocean currents
; Asymmetry
; Atmospheric convection
; CMIP5
; ENSO
; Longitudinal movements
; Southern oscillation
; Warm water
; Nickel
; advection
; asymmetry
; atmospheric convection
; El Nino-Southern Oscillation
; longitudinal gradient
; oceanic current
; zonal flow
英文摘要: The warm phase of El Niño-Southern Oscillation can grow much stronger than the cold phase, but the associated dynamics are not well understood. Here we show that the anomalous zonal advection of warm water is the major process that pushes El Niño to extremes and that this anomalous advection results from the coupling of oceanic currents with eastward migration of the atmospheric convection; a greater zonal advection is associated with a greater extent of the eastward migration. By contrast, there is a limited extent for westward migration during La Niña. Climate models that successfully simulate the amplitude asymmetry display a systematic linkage of a greater longitudinal movement of the convection center with a stronger zonal advection and greater El Niño amplitude. In a warming world, the longitudinal migration of convection response increases, as does the role of zonal advection, increasing the frequency of future extremes of El Niño. Key Points The anomalous zonal advection is the booster of extreme El Niño Migration of convection coupled with ocean currents pushes El Niño to extremes This mechanism will continue to push extreme El Niño in a warming climate ©2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930478155&doi=10.1002%2f2015GL063886&partnerID=40&md5=5af3d8a4a0f76421f5ca9a4fde7f197e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9130
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: CSIRO Marine and Atmospheric Research, Melbourne, VIC, Australia
Recommended Citation:
Kim W.,Cai W.,Kug J.-S.. Migration of atmospheric convection coupled with ocean currents pushes El Niño to extremes[J]. Geophysical Research Letters,2015-01-01,42(9).