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DOI | 10.1002/2017JD026467 |
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
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ISSN | 2169-897X |
EISSN | 2169-8996 |
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 |
推荐引用方式 GB/T 7714 | 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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