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Proceedings Paper

Absorption of solar radiation in the atmosphere in the presence of broken clouds
Author(s): T. B. Zhuravleva
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Paper Abstract

Two approaches are used to study the ratio r of radiative forcings at the top of the atmosphere (TOA) and at the underlying surface. According to regression approach to r determination, the cloud random geometry has little effect on the ratio of radiative forcings. The other approach assumes that r depends not only on absorption change due to occurrence of clouds in the clear atmosphere, but also no associated albedo alternations at TOA. For this reason, the r difference between cumulus and stratus clouds, while being small at low surface albedos As <EQ 0.2, may increase by tens of percent as As increases for optically thin clouds and small cloud fractions when solar zenith angle (xi) (direct sum) <EQ 30 degrees. After the ratio of radiative forcings is averaged over the entire set of cloud optical and geometrical characteristics, the dependence of r on cloud type becomes much weaker.

Paper Details

Date Published: 14 December 1998
PDF: 8 pages
Proc. SPIE 3495, Satellite Remote Sensing of Clouds and the Atmosphere III, (14 December 1998); doi: 10.1117/12.332689
Show Author Affiliations
T. B. Zhuravleva, Institute for Atmospheric Optics (Russia)

Published in SPIE Proceedings Vol. 3495:
Satellite Remote Sensing of Clouds and the Atmosphere III
Jaqueline E. Russell, Editor(s)

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