DOI: 10.1002/jgrd.50510
论文题名: Cloud-resolving simulation of TOGA-COARE using parameterized large-scale dynamics
作者: Wang S. ; Sobel A.H. ; Kuang Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6290
结束页码: 6301
语种: 英语
英文关键词: cloud-resolving modeling
; damped gravity wave coupling
; parameterizing large scale dynamics
; TOGA-COARE
; tropical deep convection
; weak temperature gradient
Scopus关键词: Atmospheric temperature
; Computer simulation
; Experiments
; Gravity waves
; Oceanography
; Thermal gradients
; Velocity
; Wind effects
; Cloud-resolving
; Deep convection
; Large-scale dynamics
; TOGA-COARE
; Wave coupling
; Parameterization
; climate forcing
; cloud cover
; comparative study
; damping
; experimental study
; parameterization
; Rayleigh number
; seasonal variation
; simulation
; TOGA-COARE
; wind field
英文摘要: Variations in deep convective activity during the 4 month Tropical Ocean Global Atmosphere-Coupled Ocean Atmosphere Response Experiment (TOGA-COARE) field campaign are simulated using a cloud-resolving model (CRM). Convection in the model is coupled to large-scale vertical velocities that are parameterized using one of two different methods: the damped gravity wave (Damped-wave) method and the weak temperature gradient (WTG) method. The reference temperature profiles against which temperature anomalies are computed are taken either from observations or from a model integration with no large-scale vertical motion (but other forcings taken from observations); the parameterized large-scale vertical velocities are coupled to those temperature (or virtual temperature) anomalies. Sea surface temperature, radiative fluxes, and relaxation of the horizontal mean horizontal wind field are also imposed. Simulations with large-scale vertical velocity imposed from the observations are performed for reference. The primary finding is that the CRM with parameterized large-scale vertical motion can capture the intraseasonal variations in rainfall to some degree. Experiments in which one of several observation-derived forcings is set to its time-mean value suggest that those which influence direct forcings on the moist static energy budget - surface wind speed and sea surface temperature (which together influence surface evaporation) and radiative cooling - play the most important roles in controlling convection, particularly when the Damped-wave method is used. The parameterized large-scale vertical velocity has a vertical profile that is too bottom-heavy compared to observations when the Damped-wave method is used with vertically uniform Rayleigh damping on horizontal wind, but is too top-heavy when the WTG method is used. Key Points CRM with parameterized large-scale W captures part of intraseasonal variations Both surface turbulent fluxes and radiative cooling control convection Parameterized W is too top-heavy with WTG and too bottom-heavy with Damped-wave © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63657
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, United States; Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, New York, NY, United States; Department of Earth and Planetary Sciences, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Wang S.,Sobel A.H.,Kuang Z.. Cloud-resolving simulation of TOGA-COARE using parameterized large-scale dynamics[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)