非球形气溶胶对近红外偏振辐射传输的影响及等效球形误差分析

发布时间：2018-05-10 23:12

本文选题：非球形气溶胶 + 偏振辐射传输　；参考：《红外与毫米波学报》2017年02期

【摘要】：为定量评估非球形气溶胶对偏振辐射传输的影响,基于T矩阵模型及自主开发的矢量辐射传输模式MACAR_VSPART,讨论了漫射光辐亮度及偏振辐亮度对粒子形状的敏感性,分析了气溶胶球形假设造成的漫射光模拟偏差.结果表明,不同方向漫射光的辐亮度及偏振辐亮度对形状的敏感性不一致,且其形状敏感强度的空间分布呈现特定的特征,该特征可为气溶胶遥感过程中有效观测数据的选取提供依据.等效球形假设可造成较大的漫射光模拟偏差,其中偏振辐亮度尤为显著;天顶上行漫射光对粒子形状的敏感性远强于地面下行漫射光.
[Abstract]:In order to quantitatively evaluate the effect of non-spherical aerosols on polarized radiation transport, the sensitivity of diffuse and polarized radiance to particle shape is discussed based on T-matrix model and vector radiation transfer mode Marc VSPART. The simulation deviation of diffuse light caused by the spherical assumption of aerosol is analyzed. The results show that the radiance and polarization radiance of diffused light in different directions are not consistent with the shape sensitivity, and the spatial distribution of the shape sensitive intensity shows certain characteristics. This feature can provide a basis for the selection of effective observation data in aerosol remote sensing. The equivalent spherical assumption can result in a large simulation deviation of diffuse light, especially the polarized radiance, and the sensitivity of the skytop upstream diffuse light to the shape of particles is much stronger than that of the ground downlink diffuse light.
【作者单位】：解放军理工大学气象海洋学院;
【基金】：国家自然科学基金(41575025)~~
【分类号】：O436;X87

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