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contributor authorNoel, Vincent
contributor authorChepfer, Hélène
date accessioned2017-06-09T14:38:54Z
date available2017-06-09T14:38:54Z
date copyright2004/08/01
date issued2004
identifier issn0022-4928
identifier otherams-23537.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4160109
description abstractThe goal of this paper is to retrieve information about ice particle orientation in cirrus clouds. This is achieved by comparing simulations of sunlight reflection on a cirrus cloud with measurements of polarized radiances from the spaceborne instrument Polarization and Directionality of the Earth's Reflectance (POLDER-1) on Advanced Earth Observing Satellite-1 (ADEOS-1). Results show that horizontal orientation of crystals can be spotted by the presence of a local maximum of polarized radiance in the direction of specular reflection. The angular width of the local maximum is shown to contain information on the particle maximum deviation angle, while the maximum intensity can provide information on particle shape and relative concentrations of ice crystals, horizontally and randomly oriented. The study of 31 ice cloud cases show that in 80% of them, the deviation angle is less than 3°. Also, the relative concentration of horizontally oriented crystals is less than 21%, depending on the angular distribution used for crystal deviation.
publisherAmerican Meteorological Society
titleStudy of Ice Crystal Orientation in Cirrus Clouds Based on Satellite Polarized Radiance Measurements
typeJournal Paper
journal volume61
journal issue16
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/1520-0469(2004)061<2073:SOICOI>2.0.CO;2
journal fristpage2073
journal lastpage2081
treeJournal of the Atmospheric Sciences:;2004:;Volume( 061 ):;issue: 016
contenttypeFulltext


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