Backscattering by hexagonal ice crystals with large distortion angles

Victor A. Shishko; Alexander V. Konoshonkin; Natalia V. Kustova; Andrey P. Lyulyakin; Anatoli G. Borovoi

doi:10.1117/12.2504361

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13 December 2018 Backscattering by hexagonal ice crystals with large distortion angles

Victor A. Shishko, Alexander V. Konoshonkin, Natalia V. Kustova, Andrey P. Lyulyakin, Anatoli G. Borovoi

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Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 108334O (2018) https://doi.org/10.1117/12.2504361
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

In this paper, the calculation and the theoretical investigation of backscattering cross section were carried out as well as a lidar and linear depolarization ratios for the random oriented hexagonal ice columns. The right dihedral angle of the hexagonal ice column was distorted in a range from 0°(regular particle) to 50°. All calculations were obtained within the framework of the physical optics approximation. A wavelength of the incident light was assumed to be 1.064 μm, an index of refraction was taken as 1.3004. It has been shown that if the distortion of a right dihedral angle of the hexagonal ice column is larger than 10°, the secondary maximums in the backscattering cross section become observable due to a new type of the optical beams trajectory. Also, during the averaging over the particle distortion angle a linear depolarization ratio for the column could reach the value close to 0.7 relative units.

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Victor A. Shishko, Alexander V. Konoshonkin, Natalia V. Kustova, Andrey P. Lyulyakin, and Anatoli G. Borovoi "Backscattering by hexagonal ice crystals with large distortion angles", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 108334O (13 December 2018); https://doi.org/10.1117/12.2504361

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