globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000587
Scopus记录号: 2-s2.0-84960145936
论文题名:
The role of radiation in organizing convection in weak temperature gradient simulations
作者: Sessions S; L; , Sentic S; , Herman M; J
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期:1
起始页码: 244
结束页码: 271
语种: 英语
英文关键词: Boundary layers ; Radiation ; Temperature ; Thermal gradients ; Cloud system-resolving models ; Initial moisture ; Moist static energy ; Multiple equilibrium ; Radiative cooling ; Radiative-convective equilibrium ; Static radiation ; Weak temperature gradient approximations ; Heat radiation ; convective boundary layer ; convective cloud ; cooling ; entropy ; precipitation (climatology) ; temperature gradient
英文摘要: Using a cloud system resolving model with the large scale parameterized by the weak temperature gradient approximation, we investigated the influence of interactive versus noninteractive radiation on the characteristics of convection and convective organization. The characteristics of convecting environments are insensitive to whether radiation is interactive compared to when it is not. This is not the case for nonconvecting environments; interactive radiative cooling profiles show strong cooling at the top of the boundary layer which induces a boundary layer circulation that ultimately exports moist entropy (or analogously moist static energy) from dry domains. This upgradient transport is associated with a negative gross moist stability, and it is analogous to boundary layer circulations in radiative convective equilibrium simulations of convective self-aggregation. This only occurs when radiation cools interactively. Whether radiation is static or interactive also affects the existence of multiple equilibria-steady states which either support precipitating convection or which remain completely dry depending on the initial moisture profile. Interactive radiation drastically increases the range of parameters which permit multiple equilibria compared to static radiation; this is consistent with the observation that self-aggregation in radiative-convective equilibrium simulations is more readily attained with interactive radiation. However, the existence of multiple equilibria in absence of interactive radiation suggests that other mechanisms may result in organization. © 2016 The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75932
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 Physics, Geophysical Research Center, New Mexico Tech, Socorro, NM, United States

Recommended Citation:
Sessions S,L,, Sentic S,et al. The role of radiation in organizing convection in weak temperature gradient simulations[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(1)
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