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Summary: 1
SBDART: A Practical Tool for Plane-Parallel Radiative Transfer in the Earth's Atmosphere
Authors
Paul Ricchiazzi, Shiren Yang, and Catherine Gautier
Earth Space Research Group, Institute for Computational Earth System
Science, University of California, Santa Barbara
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Introduction
SBDART (Santa Barbara DISORT Atmospheric Radiative Transfer) is a FORTRAN computer code
designed for the analysis of a wide variety of radiative transfer problems encountered in satellite remote
sensing and atmospheric energy budget studies. The program is based on a collection of highly developed
and reliable physical models, which have been developed by the atmospheric science community over the
past few decades. The following discussion is a brief introduction to the key components of the code and the
models on which they are based.
Cloud Model
Clouds are a major modulator of the earths climate, both by reflecting visible radiation back out to space and
by intercepting part of the infrared radiation emitted by the Earth and re-radiating it back to the surface. The
computation of radiative transfer within a cloudy atmosphere requires knowledge of the scattering efficiency,
the single scattering albedo, which is the probability that a extinction event scatters rather than absorbs a
photon, and the asymmetry factor, which indicates the strength of forward scattering. SBDART contains an
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