摘要
本文提出了直接Stokes参量变换的射线追踪方案,优化了作者过去建立的求解六角冰晶粒子散射的射线追踪模式.在冰晶有吸收(折射指数为复数)的情况下,新模式采用了有效折射指数处理粒子内的非单色折射波.其次,新模式还引入了有效单次散射参量,消除了来自几何透射线的前向δ散射效应.最后,根据不同环境温度下的冰云中冰晶粒子的粒径谱分布,本文计算了粒径谱积分平均的3D随机取向六角冰晶粒子的单次散射参量.文中给出的冰晶粒子单次散射参量的数值,对研究冰云辐射特性将有一定参考价值.
A new ray-tracing method with direct transformation of Stokes parameters is presented, and the scattering model for hexagonal ice crystals developed previously by the authors is optimized. In the new model, the effectively refractive index is used to deal with the inhomogeneous re-fracted-wave for the scattering of absorptive ice crystals. Next, the effective single-scattering parameters are introduced to take away the forward delta-scattering induced by geometric rays. By using the new model, computations are carried out for the single-scattering of 3D randomly orientvcixe crystals with various particlesize spectra, and the data given in this paper may be usefuing the study of the radiative characteristics of ice clouds.
出处
《大气科学》
CSCD
北大核心
1993年第4期477-488,共12页
Chinese Journal of Atmospheric Sciences
