Calculation of light scattering of aerosol particle cluster by the discrete-dipole approximation method

Abstract

Abstract:

Ammonia sulfate, sulfuric acid, nitrate, carbon and organic carbon aerosol particle cluster are analyzed. Based on the model of cluster-cluster aggregation(CCA), the three-dimensional fractal structure of the aerosol particle clusters with different compounds and shapes is simulated, optical scattering of aerosol particle clusters is calculated by using discrete dipole approximation method (DDA). For these particle clusters, the variation of the efficiency factor with size parameters, the variation of scattering field intensity with the scattering angle，the variation of polarization degree with the scattering angle are obtained and analyzed. The calculation can be used for the analysis of the characteristics of fog haze and the light propagation in atmosphere.

Key words: optical scattering, aerosol particle cluster, cluster-cluster aggregation , discrete dipole approximation method

CLC Number:

TN958.98

XU Qiang, PAN Feng, BAI Jin-Qiang, HUANG Li, WANG Xing-Tao, HAN Yi-Ping, WU Zhen-Sen. Calculation of light scattering of aerosol particle cluster by the discrete-dipole approximation method[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(5): 370-377.

References

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