Abstract

The radiation transfer theory, based on different approximations of the Boltzmann kinetic equations, is the theoretical basis for Earth remote sensing from space and radiation forcing on the climate. A fast line-by-line model (FLBLM) of solar radiation transport in a cloudy atmosphere (improved with account for the high resolution of absorption spectra in the IR range, aerosol scattering and absorption, polarization effects, and heterogeneous and anisotropic media) is proposed. The FLBLM model, focused on the local calculations and express analysis, is implemented by statistical modeling using the algorithms of the Monte Carlo method. A hyperspectral calculation of the Stokes vector function of outgoing solar radiation in an atmosphere with cirrus clouds above cumulonimbus clouds has been performed, which makes it possible to evaluate the influence of cirrus clouds and their microphysics on spectral polarization. Models with six independent parameters in the phase matrix are used for cirrus clouds for various effective particle diameters from 10 to 120 μm, while cumulonimbus droplet clouds are described by a model with four independent parameters and an effective droplet diameter of 62 μm.

中文翻译：

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有卷云的大气中太阳辐射传输的高光谱模型

摘要

辐射传输理论基于玻尔兹曼动力学方程的不同近似，是地球空间遥感和气候辐射强迫的理论基础。多云大气中太阳辐射传输的快速逐线模型 (FLBLM)（考虑到 IR 范围内吸收光谱的高分辨率、气溶胶散射和吸收、极化效应以及非均质和各向异性介质进行了改进）是建议的。FLBLM 模型侧重于局部计算和快速分析，通过使用蒙特卡洛方法的算法进行统计建模来实现。已对积雨云上方有卷云的大气中出射太阳辐射的斯托克斯矢量函数进行了高光谱计算，这使得评估卷云及其微物理对光谱偏振的影响成为可能。相矩阵中具有六个独立参数的模型用于卷云，有效粒径从 10 到 120 μm，而积雨云液滴云由具有四个独立参数和有效液滴直径为 62 μm 的模型描述。