混合气溶胶在红外波段的散射及传输特性研究

Study of Scattering and Transmission Characteristics of Mixed Aerosols under Infrared Band

为了研究混合气溶胶在红外波段的散射及传输特性,利用HITRAN数据库提供的气溶胶粒子复折射率数据,基于Mie理论,计算了幂指数分布(Junge)、伽马(Gamma)分布和对数正态分布(LND)三种粒子谱分布下几种典型混合气溶胶在红外波段的散射特性。基于上述散射特性,采用离散纵标法,计算了气溶胶因素在大气环境对红外辐射传输的影响。结果表明,不同的粒子谱的散射特性变化趋势大致相同,但数值大小有差异。大气环境中,大气廓线及卷云对红外辐射传输产生影响比气溶胶因素要大很多。

In order to study the scattering and transmission characteristics of mixed aerosol in the infrared band,the scattering characteristics of several typical mixed aerosols are calculated under three particle spectrum distributions of Junge,Gamma and LND.It＇s based on the Mie theory and aerosol complex refractive index that the database of HITRAN offers.And the results are used to calculate the impact of aerosols factors on the transmission characteristics,based on DISORT.The results show that the scattering characteristics of the different particle spectra are almost the same.However,the numerical values are different.And in the atmospheric conditions,the atmospheric profile and cirrus have an impact on the infrared radiation transmission much larger than the aerosol factor.