DOI: 10.1175/2011JCLI4244.1
Scopus记录号: 2-s2.0-84859341980
论文题名: Impact of the atmospheric mean state on tropical instability wave activity
作者: Imada Y. ; Kimoto M. ; Chen X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 7 起始页码: 2341
结束页码: 2355
语种: 英语
Scopus关键词: Atmospheric model
; Atmospheric response
; Barotropic
; Counter current
; Energy source
; High resolution
; High-resolution models
; Intertropical convergence zone
; Mean field
; Model comparison
; Multiscales
; Oceanic
; Oceanic model
; Pacific ocean
; South equatorial currents
; Surface current
; Tropical instability waves
; Wind shear
; Feedback
; Plasma stability
; Shear flow
; State feedback
; Tropics
; Water waves
; Waves
; Computer simulation
; atmospheric modeling
; atmospheric wave
; image resolution
; intertropical convergence zone
; kinetic energy
; numerical model
; oceanic general circulation model
; wind shear
; Pacific Ocean
英文摘要: The features of simulated tropical instability waves (TIWs) in the Pacific Ocean are compared between atmospheric models of two different resolutions coupled with a uniform oceanic model. Results show that TIWs are more active in the high-resolution model, even though it includes atmospheric negative feedback. Such negative feedback is not identified in the low-resolution atmospheric model because of the absence of atmospheric responses. Comparison of the energetics between the two models shows that the large TIW activity in the higher-resolution model is due to the difference in barotropic energy sources near the surface. A high-resolution atmosphere results in a tighter intertropical convergence zone and associated stronger wind curl and shear. This causes a stronger surface current shear between the South Equatorial Current (SEC) and North Equatorial Counter Current (NECC), which is one of the main sources of TIW kinetic energy. These results indicate the important role of the atmospheric mean field on TIW activity and the advantage of using high-resolution models to represent coupling among multiscale phenomena. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52448
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, The University of Tokyo, Chiba, Japan; National Climate Center, China Meteorological Administration, Beijing, China; Tokyo Institute of Technology, Tokyo, Japan
Recommended Citation:
Imada Y.,Kimoto M.,Chen X.. Impact of the atmospheric mean state on tropical instability wave activity[J]. Journal of Climate,2012-01-01,25(7)