Scattering properties of polluted dust in 1.6-μm wavelength  

作　　者：范萌 陈良富 李莘莘 陶金花 苏林 邹铭敏 

机构地区：[1]State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Rollins School of Public Health, Emory University

出　　处：《Chinese Physics B》2014年第10期130-135,共6页中国物理B（英文版）

基　　金：Project supported by the Key Program of the National Natural Science Foundation of China(Grant No.41130528);the National Basic Research Program of China(Grant No.2010CB950801)

摘　　要：Three typical polluted dust particles （i.e., single coated dust, two-sphere/spheroid system, and coated dust with ag- gregate） including internal and semi-external mixtures are modeled, and their scattering properties at 1.6-μm wavelength are calculated by using the generalized multi-sphere Mie-solution （GMM） method. We investigate the influences of par- ticle size, morphology, and chemical composition on the scattering parameters of polluted dust particles. The analysis results demonstrate that the single scattering albedo of coated dust is much smaller than that of pure dust, especially for the spheroidal black carbon （BC） coated dust. When a dust particle semi-mixes with another aerosol particle to form a two-sphere/spheroid system, its scattering properties are much more sensitive to the size and species of monomers than the monomer shape. If an aggregated BC attaches to the coated dust, the scattering properties of whole particle mainly depend on the host particle （coated dust）.Three typical polluted dust particles （i.e., single coated dust, two-sphere/spheroid system, and coated dust with ag- gregate） including internal and semi-external mixtures are modeled, and their scattering properties at 1.6-μm wavelength are calculated by using the generalized multi-sphere Mie-solution （GMM） method. We investigate the influences of par- ticle size, morphology, and chemical composition on the scattering parameters of polluted dust particles. The analysis results demonstrate that the single scattering albedo of coated dust is much smaller than that of pure dust, especially for the spheroidal black carbon （BC） coated dust. When a dust particle semi-mixes with another aerosol particle to form a two-sphere/spheroid system, its scattering properties are much more sensitive to the size and species of monomers than the monomer shape. If an aggregated BC attaches to the coated dust, the scattering properties of whole particle mainly depend on the host particle （coated dust）.

关 键 词：scattering properties polluted dust generalized multi-sphere Mie solution method 

分 类 号：O436.2[机械工程—光学工程]