globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2014MS000342
Scopus记录号: 2-s2.0-84937203439
论文题名:
Large-scale character of an atmosphere in rotating radiative-convective equilibrium
作者: Shi X; , Bretherton C; S
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 6, 期:3
起始页码: 616
结束页码: 629
语种: 英语
英文关键词: Agglomeration ; Atmospheric temperature ; Deformation ; Hurricanes ; Oceanography ; Potential energy ; Storms ; Surface waters ; Vortex flow ; Baroclinic instability ; Eddy momentum flux ; Global atmospheric models ; Momentum transports ; Radiative-convective equilibrium ; Sea surface temperature (SST) ; Self aggregation ; Tropical cyclone ; Tropics ; atmospheric modeling ; baroclinic instability ; convective system ; eddy ; equilibrium ; Hadley cell ; polar region ; radiative forcing ; sea surface temperature ; tropical cyclone ; vorticity ; wave propagation
英文摘要: A rotating radiative-convective equilibrium on a sphere is reached using a global atmospheric model with prescribed globally uniform sea surface temperature and no insolation. In such an equilibrium state, multiple tropical cyclone-like vortices coexist in the extratropics, moving slowly poleward and westward. Many vortices have a lifetime longer than 2 months and travel from the tropics to the polar regions. The typical spacing of simulated tropical cyclone-like vortices is comparable to the deformation radius, while the production of available potential energy is at a scale slightly smaller than those vortices. It is hypothesized that the growth of tropical cyclone-like vortices is driven by the self-aggregation of convection, while baroclinic instability destabilizes any vortices that grow significantly larger than the deformation radius. A weak Hadley circulation dominates in the deep tropics, and an eastward propagating wave number 1 Kelvin-like mode having a period of 30-40 days develops at the equator. The weak Hadley circulation is found to emerge from an initially quiescent atmosphere due to poleward momentum transport by the vortices. Key Points Multiple tropical cyclone-like vortices coexist in rotating RCE on a sphere Self-aggregation and baroclinic instability limit the spacing of vortices The tropics is dominated by a Hadley circulation driven by eddy momentum flux © 2014. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76013
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Shi X,, Bretherton C,S. Large-scale character of an atmosphere in rotating radiative-convective equilibrium[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,6(3)
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