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Simulation of Brightness Fields of Solar Radiation in the Presence of Optically Anisotropic Ice-Crystal Clouds: Algorithm and Test Results
Atmospheric and Oceanic Optics Pub Date : 2021-05-06 , DOI: 10.1134/s1024856021020135
T. B. Zhuravleva

Abstract

An original algorithm of statistical simulation of the solar radiative transfer in the presence of ice-crystal clouds, optically anisotropic with respect to the zenith angle of incident radiation, is presented. Examples of preliminarily calculated local optical characteristics of clouds composed of horizontally oriented plates (without accounting for the internal absorption) are given. The software developed was tested within two numerical experiments. The first experiment compared the calculations of reflected radiation for an isotropic medium using the algorithm developed earlier for clouds composed of chaotically oriented particles, and the algorithm presented in this work. The second experiment compared the angular dependence of upward radiation and the scattering phase function in ice-crystal clouds composed of horizontally oriented plates. The numerical experiments indicate that, when this algorithm is used in the radiative transfer simulation, the properties of an optically anisotropic medium are taken adequately into account.



中文翻译:

光学各向异性冰晶云存在下太阳辐射亮度场的模拟:算法和测试结果

摘要

提出了一种在存在冰晶云的情况下对太阳辐射传递进行统计模拟的原始算法,该算法相对于入射辐射的天顶角具有光学各向异性。给出了预先计算的由水平方向的板块组成的云的局部光学特性的示例(不考虑内部吸收)。在两个数值实验中对开发的软件进行了测试。第一个实验比较了使用早先开发的针对由混沌取向的粒子组成的云的算法对各向同性介质的反射辐射的计算结果,以及本文中提出的算法。第二个实验比较了由水平定向板组成的冰晶云中向上辐射的角度依赖性和散射相位函数。

更新日期:2021-05-06
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