气溶胶光学特性及其分布位置直接决定了偏振模式的外观形态及变化.文章以偏振光在气溶胶粒子中发生的米氏多次散射理论为基础,采用蒙特卡罗过程仿真、选取气溶胶特征参数半查找表的科学研究方法,对比分析337 nm、514 nm、1536 nm三个波长分别在同温层、大陆层、近地层气溶胶出射时的大气偏振模式变化幅度和规律.模式仿真结果显示紫外波段在近地层气溶胶作用下消失,蓝绿波段相对稳定、尺度分布宽泛,红外波段的穿透性明显强于其他两个波段、起偏剧烈;统计分析构建模式中每个点的偏振度发现每个波段都有各自的稳定区间,模式中偏振度衰减或起偏均趋向于这个区间值.这为已知大气背景模式下,选取合适波段探测目标偏振扰动提供了一定的参考依据.

The location and optical properties of the aerosol directly determine the exterior appearances of the polarization pattern and its changes.Based on the Mie multiple scatter theory of polarized light in aerosol particles,this article aims to explore the subject of the changes of the skylight polarization pattern under the influence of aerosol.By using the montecarlo simulation and the aerosol characteristic parameters half look-up table as research methods,the article compares and analyses the amplitude of variation and regular patterns of the skylight polarization pattern demonstrated by light on three different wavelengths,337 nm,514 nm and 1536 nm,and in the isothermal layer,the continental layer and the surface layer.Model simulation results show that light in the ultraviolet band disappears under the effect of aerosol in the third surface layer.Light in the blue and green waveband is relative stable,while its size distributions are broad.Light in the infrared waveband boasted stronger penetrability than light in the other two wavebands,demonstrating an intense polarizing amplitude.By statistically analyzing the polarization degree of each point in the construction model,the model simulation results also find each waveband to have its own stable interval.The attenuation of polarization degree or polarization starting in mode tend to be the interval value.These results provide some reference in selecting appropriate detecting band under the given atmospheric background mode and detecting the anomaly disturbance of polarization caused by the target.