Light backscattering properties of atmospheric hexagonal ice particles with distorted shape within physical optics approximation
D.N. Timofeev1, A.V. Konoshonkin1,2, N.V. Kustova1, V.A. Shishko1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2National Research Tomsk State University, Tomsk, Russia
Keywords: light backscattering, cirrus clouds, ice particles, shape distortion, physical optics
Abstract
The calculation of the light backscattering matrices of atmospheric hexagonal ice particles distorted with different methods within the physical optics approximation for the case of arbitrary spatial orientation and single scattering was carried out. The hexagonal prism with height of 31.62 mm and external diameter of 22.14 mm, which is typical for “column” shape that is occurs in cirrus clouds, was chosen as the base geometrical shape for distortion. The calculation was carried out for particles generated with three methods of distortion of base facets: tilt, pike, and cavity. The angle of distortion varied from 0 to 50° for every type of particles. The wavelength of incident radiation was equal to 1.064 mm.
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