Backscattering Properties of Nonspherical Ice Particles Calculated by Geometrical-Optics-Integral-Equation Method
1 Meteorological Satellite Center, Nakakiyoto 3-235, Kiyose, Tokyo 204-0012, JAPAN
2 Meteorological Research Institute, Nagamine 1-1, Tsukuba, Ibaraki 305-0052, JAPAN
3 Kyushu University, Research Institute for Applied Mechanics, 6-1 Kasuga-koen Kasuga, Fukuoka 816-8580, JAPAN
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Published online: 7 June 2016
Backscattering properties of ice crystal models (Voronoi aggregates (VA), hexagonal columns (COL), and six-branched bullet rosettes (BR6)) are calculated by using geometrical-opticsintegral-equation (GOIE) method. Characteristics of depolarization ratio (δ) and lidar ratio (L) of the crystal models are examined. δ (L) values are 0.2~0.3 (4~50), 0.3~0.4 (10~25), and 0.5~0.6 (50~100) for COL, BR6, and VA, respectively, at wavelength λ=0.532 μm. It is found that small deformation of COL model could produce significant changes in δ and L.
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