DOI: 10.1175/JCLI-D-13-00677.1
Scopus记录号: 2-s2.0-84909619790
论文题名: Simulations of the West African monsoon with a superparameterized climate model. Part II: African easterly waves
作者: McCrary R.R. ; Randall D.A. ; Stan C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 22 起始页码: 8323
结束页码: 8341
语种: 英语
Scopus关键词: Atmospherics
; Computer simulation
; Waves
; Africa
; African easterly waves
; Cloud parameterizations
; Cloud resolving model
; Community climate system model
; Coupled general circulation models
; Coupled models
; West African Monsoon
; Climate models
; atmospheric convection
; climate modeling
; easterly wave
; general circulation model
; monsoon
; parameterization
; regional climate
; West Africa
英文摘要: The relationship between African easterly waves and convection is examined in two coupled general circulation models: the Community Climate System Model (CCSM) and the ''superparameterized'' CCSM (SP-CCSM). In the CCSM, the easterly waves are much weaker than observed. In the SP-CCSM, a twodimensional cloud-resolving model replaces the conventional cloud parameterizations of CCSM. Results show that this allows for the simulation of easterly waves with realistic horizontal and vertical structures, although the model exaggerates the intensity of easterly wave activity over West Africa. The simulated waves of SP-CCSM are generated in East Africa and propagate westward at similar (although slightly slower) phase speeds to observations. The vertical structure of the waves resembles the first baroclinicmode. The coupling of the waves with convection is realistic. Evidence is provided herein that the diabatic heating associated with deep convection provides energy to the waves simulated in SP-CCSM. In contrast, horizontal and vertical structures of the weak waves in CCSM are unrealistic, and the simulated convection is decoupled from the circulation. © 2014 American Meteorological Society. 资助项目: AGS, National Center for Atmospheric Research
; NCAR, National Center for Atmospheric Research
; NSF, National Center for Atmospheric Research
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51092
Appears in Collections: 气候变化事实与影响
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Calverton, MD, United States
Recommended Citation:
McCrary R.R.,Randall D.A.,Stan C.. Simulations of the West African monsoon with a superparameterized climate model. Part II: African easterly waves[J]. Journal of Climate,2014-01-01,27(22)