globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000502
Scopus记录号: 2-s2.0-84959461388
论文题名:
Exploring bin-macrophysics models for moist convective transport and clouds
作者: Neggers R; A; J
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:4
起始页码: 2079
结束页码: 2104
语种: 英语
英文关键词: Earth sciences ; Mass transfer ; Parameterization ; Convective mass flux ; EDMF ; Environmental humidities ; Equilibration process ; Indirect interactions ; Macrophysics ; Moist convection ; Single column model simulations ; Large eddy simulation ; atmospheric convection ; atmospheric plume ; climate modeling ; cloud ; convective system ; coupling ; cumulus ; flux measurement ; humidity ; large eddy simulation ; marine atmosphere ; mass transport ; parameterization ; physics ; size
英文摘要: This study explores a mass flux framework for moist convective transport and clouds that is formulated in terms of discretized size densities. The properties of each bin in these histograms are estimated individually, making use of a rising plume model. In this framework, the number density acts as a weight, appearing in the area fraction of the mass flux. Such "bin-macrophysics" models have the benefit that bulk closures become redundant, and that scale-awareness is introduced at the basis of the formulation. Large-eddy simulation results are used to verify the design of this framework and to constrain associated constants of proportionality. The behavior of the framework is explored by means of single-column model simulations of various idealized cases of shallow and deeper surface-driven convection. A smoothly developing solution for a deepening marine shallow cumulus case is obtained, reproducing key aspects of transport and clouds that define this regime. Further investigation of the size statistics of the framework reveals that indirect interactions between size-bins play a key role in the equilibration process. An "acceleration-detrainment" layer is identified above cloud base in which the flux uptake by the largest plumes is counteracted by the detrainment by decelerating smaller plumes. This suppresses CIN, and thus acts to preserve the cloud-subcloud coupling. The convective mass flux shows sensitivity to environmental humidity in the deeper convective cases, reproducing transitions from shallow-to-deep convection. Sensitivity tests are performed to assess the impact of various components of the framework. © 2015. The Authors.
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被引频次[WOS]:45   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75965
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: Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany

Recommended Citation:
Neggers R,A,J. Exploring bin-macrophysics models for moist convective transport and clouds[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(4)
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