Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD027680 |
Sensitivities of Simulated Satellite Views of Clouds to Subgrid-Scale Overlap and Condensate Heterogeneity | |
Hillman, B. R.1; Marchand, R. T.2; Ackerman, T. P.2,3 | |
2018-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:14页码:7506-7529 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Satellite simulators are often used to account for limitations in satellite retrievals of cloud properties in comparisons between models and satellite observations. The purpose of this framework is to enable more robust evaluation of model cloud properties, so that differences between models and observations can more confidently be attributed to model errors. A critical step in this process is accounting for the difference between the spatial scales at which cloud properties are retrieved with those at which clouds are simulated in global models. In this study, we create a series of sensitivity tests using 4-km global model output from the multiscale modeling framework to evaluate the sensitivity of simulated satellite retrievals to common assumptions about cloud and precipitation overlap and condensate variability used in climate models whose grid spacing is many tens to hundreds of kilometers. We find the simulated retrievals are sensitive to these assumptions. Using maximum-random overlap with homogeneous cloud and precipitation condensate leads to errors in Multiangle Imaging Spectroradiometer and International Satellite Cloud Climatology Project-simulated cloud cover and in CloudSat-simulated radar reflectivity that are significant compared to typical differences between the model simulations and observations. A more realistic treatment of unresolved clouds and precipitation is shown to substantially reduce these errors. The sensitivity to these assumptions underscores the need for the adoption of more realistic subcolumn treatments in models and the need for consistency among subcolumn assumptions between models and simulators to ensure that simulator-diagnosed errors are consistent with the model formulation. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441965400028 |
WOS关键词 | COMMUNITY ATMOSPHERE MODEL ; BOUNDARY-LAYER CLOUDS ; AVERAGED SOLAR FLUXES ; RESOLVING MODEL ; PART I ; HORIZONTAL INHOMOGENEITY ; INSTRUMENT SIMULATORS ; PHYSICAL PROCESSES ; RADAR DATA ; PARAMETERIZATION |
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/32694 |
专题 | 气候变化 |
作者单位 | 1.Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Joint Inst Study Atmosphere & Ocean, Seattle, WA USA |
推荐引用方式 GB/T 7714 | Hillman, B. R.,Marchand, R. T.,Ackerman, T. P.. Sensitivities of Simulated Satellite Views of Clouds to Subgrid-Scale Overlap and Condensate Heterogeneity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(14):7506-7529. |
APA | Hillman, B. R.,Marchand, R. T.,&Ackerman, T. P..(2018).Sensitivities of Simulated Satellite Views of Clouds to Subgrid-Scale Overlap and Condensate Heterogeneity.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(14),7506-7529. |
MLA | Hillman, B. R.,et al."Sensitivities of Simulated Satellite Views of Clouds to Subgrid-Scale Overlap and Condensate Heterogeneity".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.14(2018):7506-7529. |
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