globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2013MS000282
Scopus记录号: 2-s2.0-84899122322
论文题名:
Intercomparison of large-eddy simulations of Arctic mixed-phase clouds: Importance of ice size distribution assumptions
作者: Ovchinnikov M; , Ackerman A; S; , Avramov A; , Cheng A; , Fan J; , Fridlind A; M; , Ghan S; , Harrington J; , Hoose C; , Korolev A; , McFarquhar G; M; , Morrison H; , Paukert M; , Savre J; , Shipway B; J; , Shupe M; D; , Solomon A; , Sulia K
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期:1
起始页码: 223
结束页码: 248
语种: 英语
英文关键词: Bins ; Computer simulation ; Large eddy simulation ; Size distribution ; Arctic clouds ; Cloud microphysics ; Gamma size distribution ; Ice size distribution ; Mixed-phase cloud ; Model representation ; Radiation parameterization ; Substantial reduction ; Ice ; aerosol ; arctic environment ; cloud microphysics ; large eddy simulation ; numerical model ; parameterization ; size distribution
英文摘要: Large-eddy simulations of mixed-phase Arctic clouds by 11 different models are analyzed with the goal of improving understanding and model representation of processes controlling the evolution of these clouds. In a case based on observations from the Indirect and Semi-Direct Aerosol Campaign (ISDAC), it is found that ice number concentration, Ni, exerts significant influence on the cloud structure. Increasing Ni leads to a substantial reduction in liquid water path (LWP), in agreement with earlier studies. In contrast to previous intercomparison studies, all models here use the same ice particle properties (i.e., mass-size, mass-fall speed, and mass-capacitance relationships) and a common radiation parameterization. The constrained setup exposes the importance of ice particle size distributions (PSDs) in influencing cloud evolution. A clear separation in LWP and IWP predicted by models with bin and bulk microphysical treatments is documented and attributed primarily to the assumed shape of ice PSD used in bulk schemes. Compared to the bin schemes that explicitly predict the PSD, schemes assuming exponential ice PSD underestimate ice growth by vapor deposition and overestimate mass-weighted fall speed leading to an underprediction of IWP by a factor of two in the considered case. Sensitivity tests indicate LWP and IWP are much closer to the bin model simulations when a modified shape factor which is similar to that predicted by bin model simulation is used in bulk scheme. These results demonstrate the importance of representation of ice PSD in determining the partitioning of liquid and ice and the longevity of mixed-phase clouds. Key Points Constrained LES of mixed-phase Arctic clouds from 11 models are analyzed Ice water path differences are attributed to assumed ice size distributions Bulk schemes with gamma size distributions agree better with bin schemes © 2014. 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/76098
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: Pacific Northwest National Laboratory, Richland WA, United States; NASA Goddard Institute for Space Studies, New York NY, United States; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge MA, United States; Science Systems and Applications Inc./NASA LaRC, Hampton VA, United States; Department of Meteorology, Pennsylvania State University, University Park, State College PA, United States; Karlsruhe Institute of Technology, Karlsruhe, Germany; Environment Canada, Toronto ON, Canada; Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana IL, United States; National Center for Atmospheric Research, Boulder CO, United States; Department of Meteorology, Stockholm University, Stockholm, Sweden; Met Office, Exeter, United Kingdom; Cooperative Institute for Research in Environmental Science, University of Colorado/NOAA, Boulder CO, United States; Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton NJ, United States

Recommended Citation:
Ovchinnikov M,, Ackerman A,S,et al. Intercomparison of large-eddy simulations of Arctic mixed-phase clouds: Importance of ice size distribution assumptions[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(1)
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