基于组合拟合法的冰晶粒子的光散射计算  

Calculation of Light Scattering on Ice Crystals Particles by Using Combination Fitted Method

作　　者：刘建斌[1] 曹帅[1] 游春莲[1] 胡旭波[1] 

机构地区：[1]华南农业大学理学院,广州510642

出　　处：《光散射学报》2008年第1期1-6,共6页The Journal of Light Scattering

基　　金：华南农业大学校长基金(4900-K06168)

摘　　要：利用组合拟合法计算了冰晶粒子的单次散射特性。给出了消光效率因子、单次散射反照度及非对称因子的拟合公式,利用拟合公式对有效粒子尺度为20μm和120μm的六种冰晶粒子的消光效率因子、单次散射反照度及非对称因子进行了计算。结果表明,粒子的消光效率因子、单次散射反照率和非对称因子随着入射波长的增加有着较大的起伏,后两者随着波长的增加而变化趋势基本一致;对于单次散射反照率来说,在可见光波段,反照率非常接近于1;在短波段,粒子的非对称因子变化较小,并且随着波长的增加,非对称因子会逐渐增大。The calculation of Single-scattering properties on ice crystals by using combination method is presented. The fitted formulations of the extinction efficiencies, single-scattering albedo, and asymmetry factors are presented. These parameters are calculated by using fitted formulation at the effective particles size of 20μm and 120μm. The simulation results show that, the extinction efficiencies, single-scattering albedo and asymmetry factors change evident with the incident wavelength; single-scattering albedo and asymmetry factors change identical with the incident wavelength; at the visible band, the single-scattering albedo tends to the value of 1 and the value of the asymmetry factors is small, as the incident wavelength increase , the asymmetry factors increases.

关 键 词：大气光学 光散射 冰晶粒子 组合拟合法 

分 类 号：TN012[电子电信—物理电子学]