对流层与平流层大气气溶胶粒子的若干散射特性

本文应用Ｍｉｅ散射理论，采用简洁方案计算了ＩＡＭＡＰ提出的大气气溶胶主要粒子的散射效率因子及散射相函数，结果表明，大颗粒的散射能力以７５％硫酸液滴最强，其次是水滴，冰晶，沙尘性粒子；小粒子的散射能力仍以７５％硫酸滴最强，其次是沙尘性粒子，小颗粒相函数的前向后向基本对称；大粒相函数随Ｘ值增大而不对称加大；折射率实部不同，则相函数最小值出现在不同的散射角，折射率虚部较大的煤烟，相函数起伏较小，约在１０

A NUMBER OF SCATTERING CHARACTERISTICS OF ATMOSPHERIC AEROSOL PARTICLES IN TROPOSPHERE AND STRATOSPHERE

Based on the Mie scattering theory, scattering efficlency factor and scattering phase function of aerosol primary particle which IAMAP proposed are computed by using succinct scheme. Results show:among scattering ability big particles can be arranged in following order: 75% H2SO4 droplet,water droplet,ice crystal and sand-dust particle. Among small particles, 75% H2SO4 droplet' s is the strongest,sand -dust particle comes second.The forward phase function of small paticle is basically symmetric with respect to the backward phase function. But big particle' s phase function asymmetry tends to increase with increasing X. When refractive indexes are different in real part, the mininum values of the phase function appear on different scattering angles. If imaginary part is great, the phase function rises and falls smoothly.