Application of asymptotic expressions for computing the polarized radiation in optically thick planetary atmospheres

Details Application of asymptotic expressions for computing the polarized radiation in optically thick planetary atmospheres Application of asymptotic expressions for computing the polarized radiation in optically thick planetary atmospheres

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..258w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 1, p. 258-268

Computer Science

Numerical Analysis

4

Asymptotic Methods, Numerical Analysis, Optical Thickness, Polarized Radiation, Radiative Transfer, Venus Atmosphere, Eigenvectors, Homogeneity, Scattering, Planets, Atmosphere, Optical Properties, Thickness, Radiation, Intensity, Radiative Transfer, Numerical Methods, Calculations, Techniques, Clouds, Venus, Particles, Scattering, Reflectivity

Scientific paper

For optically thick plane-parallel homogeneous atmospheres the internal and emerging radiation may be calculated using one of the standard methods to solve radiative transfer problems. Alternatively, this radiation may be approximated by using so-called asymptotic expressions, which involve the reflection properties of the corresponding semi-finite atmosphere and the leading eigensolution of the equation of radiative transfer. In this paper we illustrate the accuracy of these approximations for an atmosphere containing Venus cloud particles. It is shown that for conservative and near conservative scattering in this Venus atmosphere the approximations give accurate results for the reflected, midlevel and transmitted polarized radiation if the optical thickness is larger than 3, 20 and 10, respectively. In addition, accurate numerical values of quantities pertaining to the asymptotic expressions have been tabulated.

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