大气与环境光学学报 ›› 2018, Vol. 13 ›› Issue (5): 370-377.

• 大气光学 • 上一篇    下一篇

离散偶极子方法研究雾霾随机簇团粒子的光散射特性

徐强1, 潘丰1,白进强1,黄莉2,王杏涛2,韩一平1,吴振森1   

  1. (1西安电子科技大学物理与光电工程学院,陕西 西安 710071 ; 2中国空空导弹研究院 河南 洛阳 471009)
  • 出版日期:2018-09-28 发布日期:2018-09-28
  • 作者简介:徐强(1973-),男,陕西西安市人,博士,副教授,主要从事激光传输、散射方面的研究。
  • 基金资助:

    Supported by National Natural Science Foundation of China(国家自然科学基金 61571355),Aeronautical Science Foundation of China(航空科学基金 20150181002)

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

Xu Qiang1*; Pan Feng1; Huang Li2; Wang Xingtao2 ;Han Yinping1; Wu zhensen1   

  1. (1School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; 2 China Airborne Missile Academy, Luoyang 471009, China)
  • Published:2018-09-28 Online:2018-09-28
  • Supported by:

    Supported by National Natural Science Foundation of China(国家自然科学基金 61571355),Aeronautical Science Foundation of China(航空科学基金 20150181002)

摘要:

分析硫酸、硫酸、硝酸盐、碳和有机碳等组成的雾霾污染物簇团,基于团簇 -团簇凝聚模型(CCA),对簇团粒子的随机三维结构进行了模拟,构建不同成分,不同形状簇团粒子,在此基础上运用离散偶极子近似法计算了雾霾簇团粒子的光散射性质,进而仿真计算了不同形状的雾霾簇团粒子的光学散射,分析了雾霾簇团粒子散射场强度随散射角、效率因子与尺度因子变化关系,偏振度随散射角的变化结果。计算结果可用于分析大气雾霾特性和大气光传输特性。

关键词: 光散射, 气溶胶簇团粒子, 团簇-团簇凝聚模型, 离散偶极子法

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

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