DOI: 10.1175/JCLI-D-15-0211.1
Scopus记录号: 2-s2.0-84946219801
论文题名: Nonlinear zonal wind response to ENSO in the CMIP5 models: Roles of the zonal and meridional shift of the ITCZ/SPCZ and the simulated climatological precipitation
作者: Choi K.-Y. ; Vecchi G.A. ; Wittenberg A.T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 21 起始页码: 8556
结束页码: 8573
语种: 英语
Scopus关键词: Climatology
; Nickel
; Atmospheric model
; Coupled climate model
; Equatorial Pacific
; Linear correlation
; Precipitation anomalies
; Shallow waters
; Total rainfall
; Wind response
; Climate models
; air-sea interaction
; atmospheric modeling
; climate modeling
; El Nino-Southern Oscillation
; intertropical convergence zone
; La Nina
; nonlinearity
; precipitation (climatology)
; sea surface temperature
; zonal wind
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: The observed equatorial Pacific zonal wind response during El Niño tends to be stronger than during La Niña. Most global coupled climate models in phase 5 of CMIP (CMIP5) exhibit such nonlinearity, although weaker than observed. The wind response nonlinearity can be reproduced by driving a linear shallow water atmospheric model with a model's or the observed precipitation anomalies, which can be decomposed into two main components: the zonal and meridional redistribution of the climatological precipitation. Both redistributions contribute comparably to the total rainfall anomalies, whereas the zonal redistribution plays the dominant role in the zonal wind response. The meridional redistribution component plays an indirect role in the nonlinear wind response by limiting the zonal redistribution during La Niña and thus enhancing the nonlinearity in the wind response significantly. During La Niña, the poleward movement of the ITCZ/SPCZ reduces the equatorial zonal-mean precipitation available for the zonal redistribution and its resulting zonal wind response. Conversely, during El Niño, the equatorward movement of the ITCZ and SPCZ do not limit the zonal redistribution of precipitation. The linear equatorial zonal wind response to ENSO is found to have a significant linear correlation with the equatorial central Pacific climatological precipitation and SST among the CMIP5 models. However, no linear correlation is found between the nonlinear equatorial zonal wind response and the climatological precipitation. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50583
Appears in Collections: 气候变化事实与影响
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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Choi K.-Y.,Vecchi G.A.,Wittenberg A.T.. Nonlinear zonal wind response to ENSO in the CMIP5 models: Roles of the zonal and meridional shift of the ITCZ/SPCZ and the simulated climatological precipitation[J]. Journal of Climate,2015-01-01,28(21)