Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0105.1 |
Methods for Estimating 2D Cloud Size Distributions from 1D Observations | |
Romps, David M.1,2; Vogelmann, Andrew M.3 | |
2017-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The two-dimensional (2D) size distribution of clouds in the horizontal plane plays a central role in the calculation of cloud cover, cloud radiative forcing, convective entrainment rates, and the likelihood of precipitation. Here, a simple method is proposed for calculating the area-weighted mean cloud size and for approximating the 2D size distribution from the 1D cloud-chord lengths measured by aircraft and vertically pointing lidar and radar. This simple method (which is exact for square clouds) compares favorably against the inverse Abel transform (which is exact for circular clouds) in the context of theoretical size distributions. Both methods also perform well when used to predict the size distribution of real clouds from a Landsat scene. When applied to a large number of Landsat scenes, the simple method is able to accurately estimate the mean cloud size. As a demonstration, the methods are applied to aircraft measurements of shallow cumuli during the Routine ARM Aerial Facility (AAF) Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) campaign, which then allow for an estimate of the true area-weighted mean cloud size. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417993900005 |
WOS关键词 | AIRCRAFT OBSERVATIONS ; CUMULUS CLOUDS ; PRECIPITATION |
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/29406 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 2.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA 94720 USA; 3.Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 USA |
推荐引用方式 GB/T 7714 | Romps, David M.,Vogelmann, Andrew M.. Methods for Estimating 2D Cloud Size Distributions from 1D Observations[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(10). |
APA | Romps, David M.,&Vogelmann, Andrew M..(2017).Methods for Estimating 2D Cloud Size Distributions from 1D Observations.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(10). |
MLA | Romps, David M.,et al."Methods for Estimating 2D Cloud Size Distributions from 1D Observations".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.10(2017). |
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