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DOI | 10.1029/2018JD029659 |
An Efficient Method for Microphysical Property Retrievals in Vertically Inhomogeneous Marine Water Clouds Using MODIS-CloudSat Measurements | |
Saito, Masanori1; Yang, Ping1; Hu, Yongxiang2; Liu, Xu2; Loeb, Norman2; Smith, William L., Jr.2; Minnis, Patrick2 | |
2019-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:4页码:2174-2193 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | An efficient method is developed to infer cloud optical thickness (COT) and cloud droplet effective radius (CDER) of marine water clouds from Moderate Resolution Imaging Spectroradiometer (MODIS) and CloudSat measurements, incorporating droplet size vertical inhomogeneity. Empirical orthogonal function (EOF) analysis is employed to reduce the degrees of freedom of the droplet size profile. The first two EOFs can explain 94% of the variability in the droplet size profile. Compared to the existing bispectral CDER retrieval from MODIS assuming plane parallel vertically homogeneous clouds, the new retrieval produces smaller CDER values in clouds in which the adiabatic growth process is dominant and larger CDER values in clouds in which the collision-coalescence process is dominant. To evaluate the performance of the retrieval algorithm, we compare retrieved COT and CDER in this study with their MODIS and CloudSat counterparts on a pixel-by-pixel basis. CDER retrieval based on the vertically homogeneous assumption may be underestimated by 30% due to droplet size vertical inhomogeneity when COT is large and the collision-coalescence process is dominant in the cloud. Retrieved CDER in conjunction with the two scores for EOFs can reconstruct the vertical profile of CDER, which is useful for cloud microphysical process studies. Furthermore, potential expansion of this algorithm to MODIS pixels without CloudSat collocations is discussed. |
英文关键词 | marine water clouds remote sensing droplet size EOF |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461856300017 |
WOS关键词 | DROPLET EFFECTIVE RADIUS ; SOLAR-RADIATION ; LIQUID WATER ; OPTICAL-THICKNESS ; GROWTH |
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/32200 |
专题 | 气候变化 |
作者单位 | 1.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA; 2.NASA, Langley Res Ctr, Hampton, VA 23665 USA |
推荐引用方式 GB/T 7714 | Saito, Masanori,Yang, Ping,Hu, Yongxiang,et al. An Efficient Method for Microphysical Property Retrievals in Vertically Inhomogeneous Marine Water Clouds Using MODIS-CloudSat Measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(4):2174-2193. |
APA | Saito, Masanori.,Yang, Ping.,Hu, Yongxiang.,Liu, Xu.,Loeb, Norman.,...&Minnis, Patrick.(2019).An Efficient Method for Microphysical Property Retrievals in Vertically Inhomogeneous Marine Water Clouds Using MODIS-CloudSat Measurements.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(4),2174-2193. |
MLA | Saito, Masanori,et al."An Efficient Method for Microphysical Property Retrievals in Vertically Inhomogeneous Marine Water Clouds Using MODIS-CloudSat Measurements".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.4(2019):2174-2193. |
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