globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2013MS000261
Scopus记录号: 2-s2.0-84899127977
论文题名:
Downdrafts in the near cloud environment of deep convective updrafts
作者: Glenn I; B; , Krueger S; K
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期:1
起始页码: 7
结束页码: 8
语种: 英语
英文关键词: Buoyancy ; Clouds ; Evaporative cooling systems ; Large eddy simulation ; Mixing ; Natural convection ; Cloud environments ; Deep convection ; Deep convective updrafts ; Evaporative cooling ; Large domain ; Shallow convection ; Shallow cumulus ; subsiding shells ; Shells (structures) ; atmospheric convection ; buoyancy ; cumulus ; large eddy simulation ; mass transfer ; mixing ; numerical model ; updraft
英文摘要: We used a large domain, large eddy simulation (LES) of tropical deep convection to investigate the properties of 3-D cloudy updrafts and the near cloud environment (NCE) directly adjacent to them. We show for the first time that the properties of the air in the NCE of deep convection imply the existence of a subsiding shell like that which is already known to exist around shallow convection. We show that there is negative buoyancy in the NCE due to mixing and evaporative cooling, and that there is significant negative net mass flux in the NCE relative to the cloudy updraft mass flux. This demonstrates that the "subsiding shell" viewpoint of the NCE region of shallow cumulus updrafts can and should be applied to deep convective updrafts as well. Key Points We find evidence of a subsiding shell in the near environment of deep convection Quantify that shell compensates less-updraft mass flux for larger updraft size Buoyancy sorting view of mixing at the updraft boundary can explain the shell ©2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76094
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 Utah, Salt Lake City UT, United States

Recommended Citation:
Glenn I,B,, Krueger S,et al. Downdrafts in the near cloud environment of deep convective updrafts[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(1)
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