GSTDTAP  > 气候变化
DOI10.1002/2017JD026467
Analysis of albedo versus cloud fraction relationships in liquid water clouds using heuristic models and large eddy simulation
Feingold, Graham1; Balsells, Joseph2; Glassmeier, Franziska1,3; Yamaguchi, Takanobu1,2; Kazil, Jan1,2; McComiskey, Allison1
2017-07-16
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2017
卷号122期号:13
文章类型Article
语种英语
国家USA
英文摘要

The relationship between the albedo of a cloudy scene. and cloud fraction f(c) is studied with the aid of heuristic models of stratocumulus and cumulus clouds. Existing work has shown that scene albedo increases monotonically with increasing cloud fraction but that the relationship varies from linear to superlinear. The reasons for these differences in functional dependence are traced to the relationship between cloud deepening and cloud widening. When clouds deepen with no significant increase in fc (e.g., in solid stratocumulus), the relationship between. and fc is linear. When clouds widen as they deepen, as in cumulus cloud fields, the relationship is superlinear. A simple heuristic model of a cumulus cloud field with a power law size distribution shows that the superlinear. A-f(c) behavior is traced out either through random variation in cloud size distribution parameters or as the cloud field oscillates between a relative abundance of small clouds (steep slopes on a log-log plot) and a relative abundance of large clouds (flat slopes). Oscillations of this kind manifest in large eddy simulation of trade wind cumulus where the slope and intercept of the power law fit to the cloud size distribution are highly correlated. Further analysis of the large eddy model-generated cloud fields suggests that cumulus clouds grow larger and deeper as their underlying plumes aggregate; this is followed by breakup of large plumes and a tendency to smaller clouds. The cloud and thermal size distributions oscillate back and forth approximately in unison.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000407900300023
WOS关键词SHALLOW CUMULUS CONVECTION ; STRATOCUMULUS CLOUDS ; CELLULAR CONVECTION ; AEROSOL ; VARIABILITY ; PARAMETERIZATION ; ORGANIZATION ; POPULATIONS ; ENSEMBLE ; TRACKING
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/32554
专题气候变化
作者单位1.NOAA, Chem Sci Div, Earth Syst Res Lab, Boulder, CO 80305 USA;
2.Univ Colorado Boulder, CIRES, Boulder, CO USA;
3.CNR, Washington, DC 20418 USA
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Feingold, Graham,Balsells, Joseph,Glassmeier, Franziska,et al. Analysis of albedo versus cloud fraction relationships in liquid water clouds using heuristic models and large eddy simulation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(13).
APA Feingold, Graham,Balsells, Joseph,Glassmeier, Franziska,Yamaguchi, Takanobu,Kazil, Jan,&McComiskey, Allison.(2017).Analysis of albedo versus cloud fraction relationships in liquid water clouds using heuristic models and large eddy simulation.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(13).
MLA Feingold, Graham,et al."Analysis of albedo versus cloud fraction relationships in liquid water clouds using heuristic models and large eddy simulation".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.13(2017).
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