BACKSCATTERING PROPERTIES OF NONSPHERICAL ICE PARTICLES CALCULATED BY GEOMETRICAL-OPTICS-INTEGRAL-EQUATION METHOD

摘要

Backscattering properties of ice crystal models (Voronoi aggregates (VA), hexagonal columns (COL), and six-branched bullet rosettes (BR6)) are calculated by using geometrical-optics-integral-equation (GOIE) method. Characteristics of depolarization ratio (5) 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=0.532μm. It is found that small deformation of COL model could produce significant changes in δ and L.