中文摘要：

利用T矩阵方法，以及基于扩散限制凝聚理论的广义多粒子米散射方法，研究了多种气溶胶粒子在1．6和2．0μm波段处，非球形单粒子和团簇粒子的光散射辐射特性，并分析了粒子有效半径、复折射指数、粒子形状、相对湿度等因素对非球形粒子散射特性的影响．分析表明，除了粒子有效半径和形状会在不同程度上引起粒子散射特性变化，相对湿度对其影响也比较大，球形粒子与非球形粒子在不同相对湿度下后向散射相对差异均在18％以上；当粒子体积较小时，水溶性气溶胶的后向散射强度随相对湿度的增加而增强，而当粒子体积较大时，则随相对湿度的增加而减弱；在体积相同的条件下，体积较小的团簇粒子的不对称因子比非球形单粒子平均偏大0．023，而体积较大的团簇粒子，却比非球形单粒子不对称因子平均偏小0．055；单粒子或等体积的团簇粒子，其不同波段之间单次散射反照率差异较大，最大可达0．226．该工作对研究气溶胶多次散射对CO2浓度卫星反演精度影响具有重要的科学意义．

英文摘要：

Based on the T-matrix method and the generalized multiparticle Mie-solution （GMM） method combined with diffusion-limited aggregation simulator, the scattering properties of non-spherical particles and aggregates are simulated at 1.6 μm and 2.0 μm. And the effects of the equal-volume sphere radius, the complex refractive index, the particle shape and the relative humidity （RH） on the scattering characteristics parameters of non-spherical aerosol are analyzed. The results show that besides the equal-volume sphere radius and the particle shape, the RH could also lead to a large change of the scattering properties. And the relative differences in back scattering between spherical particle＇s and non-spherical particles in different relative humidities are all larger than 18%. If the RH increases, the back scattering will increase for small-size particles, while the back scattering of large-size ones will decrease. The asymmetry factors of the smaller aggregates are 0.023 averagely greater than those of the single equal-volume non-spherical particles, which the asymmetry factors of the bigger aggregates are 0.055 averagely less than those of the single equal-volume non-spherical particles. The differences in single scattering albedo between the two wavelengths 1.6 μm and 2.0 μm are all much larger for either aggregates or single equal-volume particles, and the biggest difference reaches 0.226. This research has scientific significance for studying the aerosol multiple scattering influencing on the accuracy of CO2 satellite retrieval.