DOI: 10.1175/JCLI-D-11-00233.1
Scopus记录号: 2-s2.0-84865165903
论文题名: Parameterization of tropical instability waves and examination of their impact on ENSO characteristics
作者: Imada Y. ; Kimoto M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 13 起始页码: 4568
结束页码: 4581
语种: 英语
Scopus关键词: Baroclinic models
; ENSO
; General circulation model
; Intraseasonal variabilityl
; Isopycnal coordinates
; Atmospheric pressure
; Climate models
; Feedback
; Heat flux
; Heat transfer
; Nickel compounds
; Parameterization
; Stream flow
; Water waves
; atmospheric general circulation model
; atmospheric wave
; baroclinic mode
; eddy
; El Nino-Southern Oscillation
; heat balance
; heat flux
; heat transfer
; isopycnal layer
; oceanic general circulation model
; parameterization
; seasonal variation
; stratification
; thermocline
; tropical meteorology
英文摘要: The impact of tropical instability waves (TIWs) on El Nin{ogonek} o-Southern Oscillation (ENSO) characteristics is investigated by introducing a new parameterization of TIWs into an atmosphere-ocean general circulation model (AOGCM), the Model for Interdisciplinary Research on Climate (MIROC), with a medium-resolution (;1.48) oceanmodel (known asMIROCmedres).Because this resolution is not sufficient to reproduce eddies at the spatial scale of TIWs, this approach isolates TIW effects from other factors that can affect ENSO characteristics. The parameterization scheme represents the effect of baroclinic eddy heat transport by TIWs.A100-yr integration reveals a significant role of TIWs in observed ENSO asymmetry. Asymmetric heat transport associated with TIWs that are active (inactive) duringLaNin{ogonek}a (ElNin{ogonek}o) generates a significant asymmetric negative feedback to ENSOand explains the observed asymmetric feature of a stronger-amplitude El Nin{ogonek}o and weakeramplitude La Nin{ogonek} a. Furthermore, the parameterized eddy heat flux also affects the mean subsurface heat balance via the shallowing and steepening thermocline. This change in subsurface stratification induces a stronger thermocline feedback and a longer ENSO period. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52347
Appears in Collections: 气候变化事实与影响
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作者单位: Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan
Recommended Citation:
Imada Y.,Kimoto M.. Parameterization of tropical instability waves and examination of their impact on ENSO characteristics[J]. Journal of Climate,2012-01-01,25(13)