气候变化领域集成服务门户(CCPortal): Retrieval of Ice-Over-Water Cloud Microphysical and Optical Properties Using Passive Radiometers

CCPortal

DOI	10.1029/2020GL088941
	Retrieval of Ice-Over-Water Cloud Microphysical and Optical Properties Using Passive Radiometers
	Teng S.; Liu C.; Zhang Z.; Wang Y.; Sohn B.-J.; Yung Y.L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Current satellite cloud products from passive radiometers provide effective single-layer cloud properties by assuming a homogeneous cloud in a pixel, resulting in inevitable biases when multiple-layer clouds are present in a vertical column. We devise a novel method to retrieve cloud vertical properties for ice-over-water clouds using passive radiometers. Based on the absorptivity differences of liquid water and ice clouds at four shortwave-infrared channels (centered at 0.87, 1.61, 2.13, and 2.25 μm), cloud optical thicknesses (COT) and effective radii of both upper-layer ice and lower-layer liquid water clouds are inferred simultaneously. The algorithm works most effectively for clouds with ice COT < 7 and liquid water COT > 5. The simulated spectral reflectances based on our retrieved ice-over-water clouds become more consistent with observations than those with a single-layer assumption. This new algorithm will improve our understanding of clouds, and we suggest that these four cloud channels should be all included in future satellite sensors. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Liquids; Optical properties; Radiometers; Cloud products; Cloud properties; Liquid water clouds; Multiple layers; Satellite sensors; Short wave infrared; Spectral reflectances; Vertical columns; Ice; algorithm; cloud microphysics; ice cover; optical depth; optical property; pixel; radiometric survey; satellite sensor; shortwave radiation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169927
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China; Department of Physics, University of Maryland, Baltimore County, MD, United States; Division of Geological and Planetary Science, California Institute of Technology, Pasadena, CA, United States; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
推荐引用方式 GB/T 7714	Teng S.,Liu C.,Zhang Z.,et al. Retrieval of Ice-Over-Water Cloud Microphysical and Optical Properties Using Passive Radiometers[J],2020,47(16).
APA	Teng S.,Liu C.,Zhang Z.,Wang Y.,Sohn B.-J.,&Yung Y.L..(2020).Retrieval of Ice-Over-Water Cloud Microphysical and Optical Properties Using Passive Radiometers.Geophysical Research Letters,47(16).
MLA	Teng S.,et al."Retrieval of Ice-Over-Water Cloud Microphysical and Optical Properties Using Passive Radiometers".Geophysical Research Letters 47.16(2020).