DOI: 10.1175/JCLI-D-13-00755.1
Scopus记录号: 2-s2.0-84905915164
论文题名: Improved representation of marine stratocumulus cloud shortwave radiative properties in the CMIP5 climate models
作者: Engström A. ; Bender F.A.M. ; Karlsson J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 16 起始页码: 6175
结束页码: 6188
语种: 英语
Scopus关键词: Aerosols
; Climate models
; Clouds
; Heat radiation
; Solar radiation
; Contributing factor
; Global climate model
; Intermodel variability
; Marine stratocumulus clouds
; Meteorological variability
; Model inter comparisons
; Radiative properties
; Satellite observations
; Loading
; albedo
; climate modeling
; cloud cover
; cloud microphysics
; cloud radiative forcing
; marine atmosphere
; radiative transfer
; regional climate
; satellite data
; shortwave radiation
; stratocumulus
英文摘要: The radiative properties of subtropical marine stratocumulus clouds are investigated in an ensemble of current-generation global climate models from phase 5 of the Climate Model Intercomparison Project (CMIP5). Using a previously documented method for determining regional mean cloud albedo, the authors find a closer agreement with observations in the CMIP5 models as compared to the previous generation of models (phase 3 of CMIP). The multimodel average indicates regional mean, monthly mean cloud albedos ranging from 0.32 to 0.5 among 26 models and five regions, to be compared with satellite observations that indicate a range from 0.32 to 0.39 for the same five regions. The intermodel spread in cloud fraction gives rise to a spread in albedo. Within models, there is a tendency for large cloud fraction to be related to low cloud albedo and vice versa, a relationship that dampens the intermodel variability in total albedo. The intramodel variability in albedo, for a given cloud fraction, is found to be up to twice as large in magnitude in models as in satellite observations. The reason for this larger variability in models is not settled, but possible contributing factors may be imperfect representation in the models of cloud type distribution or of sensitivity to meteorological variability or aerosols. Changes in aerosol loading are found to be the likely cause of an increase in cloud albedo over time. The radiative effect of such a scene brightening in marine stratocumulus cloud regions, from preindustrial times to present day, is estimated to be up to -1 W m-2 for the global ocean, but there are no observations to verify this number. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50996
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Meteorology, and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Recommended Citation:
Engström A.,Bender F.A.M.,Karlsson J.. Improved representation of marine stratocumulus cloud shortwave radiative properties in the CMIP5 climate models[J]. Journal of Climate,2014-01-01,27(16)