Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds

Alexander V. Konoshonkin; Natalia V. Kustova; Anatoli G. Borovoi; H. Okamoto; K. Sato; H. Ishimoto; E. Grynko; J. Foerstner

doi:10.1117/12.2248409

29 November 2016 Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds

Alexander V. Konoshonkin, Natalia V. Kustova, Anatoli G. Borovoi, H. Okamoto, K. Sato, H. Ishimoto, E. Grynko, J. Foerstner

Author Affiliations +

Proceedings Volume 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1003533 (2016) https://doi.org/10.1117/12.2248409
Event: XXII International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2016, Tomsk, Russian Federation

Abstract

In the problem of light scattering by ice crystals of cirrus clouds, two exact methods (FDTD – finite difference time domain and DGTD – discontinuous Galerkin time domain) and the physical-optics approximation are used for numerical calculations of the Mueller matrix in the case of ice hexagonal plates and columns. It is shown that for the crystals larger than 10 μm at the wavelength of 0.532 μm the exact methods and physical-optics approximation closely agreed within three diffraction fringes about the centers of the diffraction patterns. As a result, in the case of random orientation of these crystals, the physical-optics approximation provides accuracy 95% for the averaged Mueller matrix.

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Alexander V. Konoshonkin, Natalia V. Kustova, Anatoli G. Borovoi, H. Okamoto, K. Sato, H. Ishimoto, E. Grynko, and J. Foerstner "Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds", Proc. SPIE 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1003533 (29 November 2016); https://doi.org/10.1117/12.2248409

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