光学学报, 2012, 32 (6): 0629001, 网络出版: 2012-05-16   

一种内混合气溶胶粒子模型光散射的等效性

Equivalence of Light Scattering by One Internal-Mixed Model for Aerosol Particles
作者单位
1 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室, 安徽 合肥 230031
2 中国科学院研究生院, 北京 100049
摘要
以包含灰尘、黑碳和水三种成分的单分散内混合初次气溶胶为例,利用消光、吸收、散射效率因子和不对称因子,探讨了以等效折射率描述具有不同成分的内混合气溶胶粒子系统的适用性。结果表明,在尺度参数为0.1~25时不同半径比下,消光、吸收和散射效率因子的等效性较好,相对误差分别在3%、3%和4%以内;不对称因子的等效性相对稍差,相对误差在13%以内。当半径比a/b小于1/5,即内混合体中所含灰尘和黑碳较少时,等效折射率实部和虚部值基本可以确定,而不必考虑尺度参数的影响。用除散射相函数之外的其他光学量来等效时,较为容易找到等效的气溶胶粒子。
Abstract
For the monodispersion of dust and black carbon particles coated by water in internal mixing state, the validity of equivalent refractive index for the mixture is analyzed using extinction-, absorption-, scattering-efficiency factors and asymmetry parameters. The equivalences for extinction-, absorption- and scattering-efficiency factors are good with the relative errors less than 3%、 3% and 4%, respectively at different radius ratios for the size parameters from 0.1 to 25. The equivalence for asymmetry parameters is relatively a bit poor with the relative errors less than 13%. The complex refractive indices can almost be determined for the radius ratio less than 1/5, which is irrespective of the size parameter. It is easy to obtain the equivalent refractive indices of the internal mixture of particles using the optical parameters except the scattering phase function.
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张小林, 黄印博, 饶瑞中. 一种内混合气溶胶粒子模型光散射的等效性[J]. 光学学报, 2012, 32(6): 0629001. Zhang Xiaolin, Huang Yinbo, Rao Ruizhong. Equivalence of Light Scattering by One Internal-Mixed Model for Aerosol Particles[J]. Acta Optica Sinica, 2012, 32(6): 0629001.

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