DOI: 10.1002/2015MS000519
Scopus记录号: 2-s2.0-84959488002
论文题名: Uniformly rotating global radiative-convective equilibrium in the Community Atmosphere Model, version 5
作者: Reed K ; A ; , Chavas D ; R
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 4 起始页码: 1938
结束页码: 1955
语种: 英语
英文关键词: Atmospheric temperature
; Clouds
; Earth atmosphere
; Hurricanes
; Oceanography
; Surface waters
; Tropics
; Wind
; Atmospheric general circulation models
; Community atmosphere model
; Conceptual frameworks
; Horizontal resolution
; Idealized models
; Radiative-convective equilibrium
; Sea surface temperature (SST)
; Tropical cyclone
; Storms
; aggregation
; atmospheric general circulation model
; conceptual framework
; radiative forcing
; sea surface temperature
; storm surge
; tropical cyclone
; wind field
; wind velocity
英文摘要: A standard atmospheric general circulation model is run in a uniformly rotating global radiative-convective equilibrium configuration to explore the equilibrium state, including the statistics of its constituent tropical cyclones, and its sensitivity to horizontal resolution. The Community Atmosphere Model 5 (CAM5) is run at the conventional resolution of approximately 100 km grid spacing and a high resolution of 25 km grid spacing globally. The setup uses an aqua-planet configuration with spatially uniform, diurnally varying insolation, uniform fixed sea surface temperatures, and a uniform rotation rate equal to that at 10?N. The resulting state is one in which tropical cyclones fill the global domain, such that storm count and outer storm size covary strongly. At higher resolution, the storm inner core is more intense and compact but the size of the outer circulation decreases only marginally, and storm count increases in a manner consistent with this decrease in size. Furthermore, the size of the wind field and precipitation fields are highly correlated. A simple analytical model is found to robustly reproduce the radial structure of the broad outer storm circulation. Finally, the minimum central pressure is demonstrated to be an exclusive function of peak azimuthal-mean wind speed and outer storm size. Despite significant changes in the statistics of storm count, intensity, and structure, the mean environment, including the potential intensity, is nearly identical for both simulations. Results are compared with the nonrotating case from a prior study, and a generalized conceptual framework for the interpretation of aggregation with or without rotation is proposed. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75955
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: School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States
Recommended Citation:
Reed K,A,, Chavas D,et al. Uniformly rotating global radiative-convective equilibrium in the Community Atmosphere Model, version 5[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(4)