The depolarization - attenuated backscatter relation: CALIPSO lidar measurements vs. theory

Using measurements obtained by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, relationships between layer-integrated depolarization ratio (delta) and layer-integrated attenuated backscatter (gamma) are established for moderately thick clouds of both ice a...

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Bibliographic Details
Published in:Optics express 2007-04, Vol.15 (9), p.5327-5332
Main Authors: Hu, Yongxiang, Vaughan, Mark, Liu, Zhaoyan, Lin, Bing, Yang, Ping, Flittner, David, Hunt, Bill, Kuehn, Ralph, Huang, Jiangping, Wu, Dong, Rodier, Sharon, Powell, Kathy, Trepte, Charles, Winker, David
Format: Article
Language:English
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Summary:Using measurements obtained by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, relationships between layer-integrated depolarization ratio (delta) and layer-integrated attenuated backscatter (gamma) are established for moderately thick clouds of both ice and water. A new and simple form of the delta-gamma relation for spherical particles, developed from Monte Carlo simulations and suitable for both water clouds and spherical aerosol particles, is found to agree well with the observations. A high-backscatter, low-depolarization delta-gamma relationship observed for some ice clouds is shown to result primarily from horizontally oriented plates and implies a preferential lidar ratio - depolarization ratio relation in nature for ice cloud particles containing plates.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.15.005327