Numerical results for polarized light scattering in a spherical atmosphere

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https://doi.org/10.1016/j.jqsrt.2022.108194
 http://hdl.handle.net/11603/27034

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Author/Creator ORCID

https://orcid.org/0000-0001-6514-5233
 https://orcid.org/0000-0003-4695-5200

Date

2022-05-02

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journal articles
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Citation of Original Publication

Korkin, S. et al. Numerical Results for Polarized Light Scattering in a Spherical Atmosphere. Journal of Quantitative Spectroscopy and Radiative Transfer, 287, 108194 (2 May 2022). https://doi.org/10.1016/j.jqsrt.2022.108194.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

We report numerical results for polarized light reflection from the top of a Rayleigh scattering spherical atmosphere with height-dependent single scattering albedo over a dark surface. Michael Mishchenko considered this scenario back in the 1990’s, for a plane-parallel atmosphere of unit optical thickness (OT = 1), for which radiance errors arising from neglecting polarization reaches their highest values. To further extend Mishchenko's results, we consider a value of OT = 0.25, for which the effect of atmospheric curvature is pronounced. New results are generated using three state-of-the art radiative transfer (RT) codes. These are: the MYSTIC and MCSSA models, which simulate light scattering in a true-spherical atmosphere using Monte Carlo methods; and the discrete ordinate code VLIDORT, operating with a new multiple-scatter spherical correction designed to deliver reasonable approximations to spherical-medium scattering. In this work, we report results for both single and multiple scattering; this will help to support the validation of existing and future polarized spherical RT codes, especially those using approximative methods to deal with sphericity.