DOI: 10.1002/2014MS000318
Scopus记录号: 2-s2.0-84904892165
论文题名: Vertical velocity in shallow convection for different plume types
作者: Wang X ; , Zhang M
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期: 2 起始页码: 478
结束页码: 489
语种: 英语
英文关键词: Budget control
; Buoyancy
; Clouds
; Large eddy simulation
; Momentum
; A1. largeeddy simulations (LES)
; Convective clouds
; Convective plume
; Momentum sources
; Pressure gradient force
; Scaling coefficients
; Shallow convection
; Vertical velocity
; Velocity
英文摘要: This study investigates the bulk budgets of the vertical velocity and its parameterization in convective cores, convective updrafts, and clouds by using large-eddy simulation (LES) of four shallow convection cases in the Global Energy and Water Cycle Experiment (GEWEX) Cloud System Study (GCSS) programs. The relative magnitudes of the dominant momentum budget terms for the three types of plumes are presented. For all shallow cumulus except stratocumulus, the buoyancy force and the subplume transport in the core plume are the momentum source that offset the pressure gradient force. In the cloud updraft and cloud plumes, the buoyancy source is dominant in the lower and middle parts of the clouds, while the subgrid transport is a dominant source in the upper part, and the entrainment term is also a momentum source. For the stratocumulus, the subplume transport is a sink almost in the whole convective layer. For all types of plumes, the Simpson and Wiggert (1969) equation is found to be good paramaterization of the mean plume vertical velocity when appropriate scaling coefficients to buoyancy and entrainment terms are used. Optimal forms of the Simpson and Wiggert equation are given for convective cores, convective updrafts, and convective clouds. Results are compared with other studies published in the literature. Key Points Vertical velocities for different plume types are parameterized Momentum sources and sinks are analyzed for different plume types Differences between convective core, updraft, and clouds are presented © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76115
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: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook NY, United States
Recommended Citation:
Wang X,, Zhang M. Vertical velocity in shallow convection for different plume types[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(2)