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Proceedings Paper

Derivation of cloud properties from biwavelength polarization measurements
Author(s): Willem Jan Knibbe; Johan F. de Haan; Joop W. Hovenier; Larry D. Travis
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Paper Abstract

The influence of the top altitude of terrestrial liquid water clouds on the polarization of sunlight reflected by a cloudy atmosphere is theoretically investigated. It is compared to the influences of other cloud properties and of stratospheric aerosols. Using a typical atmosphere model, we show how accurately the cloud top pressure may be derived from nadir measurements performed by satellites of the polarization at 350 nm. The accuracy of the derived pressure is about 5 mb under favorable conditions, when the accuracy of polarization measurements is 0.1%, and it depends mainly on knowledge of the density of the cloud and of the stratospheric aerosol optical thickness. The stratospheric aerosol optical thickness may be estimated with an accuracy of 0.02 using observations of the polarization at 670 nm having an accuracy of 0.1%.

Paper Details

Date Published: 15 December 1995
PDF: 9 pages
Proc. SPIE 2582, Atmospheric Sensing and Modeling II, (15 December 1995); doi: 10.1117/12.228535
Show Author Affiliations
Willem Jan Knibbe, Free Univ. Amsterdam (Netherlands)
Johan F. de Haan, Free Univ. Amsterdam (Netherlands)
Joop W. Hovenier, Free Univ. Amsterdam (Netherlands)
Larry D. Travis, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 2582:
Atmospheric Sensing and Modeling II
Richard P. Santer, Editor(s)

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