在已知大气气溶胶折射率和气溶胶谱分布的基础上, 对空间垂直方向的气溶胶消光特性进行了研究。文章利用Mie散射理论计算讨论了气溶胶的消光、散射、吸收系数随各参数的变化, 并在MATLAB中对变化情况进行了仿真。结果表明, 粒子半径与入射波长大小相近时气溶胶的消光最强, 并且随着能见度的增大, 气溶胶衰减系数减小。这些结论可以为红外辐射的大气衰减计算和分析提供依据。

Based on the refractive indices of atmospheric aerosols and measured values of aerosol size distribution function, aerosol extinction characteristics have been studied in vertical space. The paper uses Mie scattering theory to calculate and discuss the mathematical characters of the extinction coefficient, scattering coefficient, absorption coefficient with the change of each parameter of aerosols and its simulation in MATLAB. The results show that extinction of aerosol particle is the strongest when the size of radius is close to the incident wavelength, and with the increasing visibility, aerosol attenuation coefficient decreases. These results can provide reference for calculating and analyzing the attenuation of infrared radiation in the atmosphere.