中国物理B ›› 2012, Vol. 21 ›› Issue (5): 54204-054204.doi: 10.1088/1674-1056/21/5/054204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Multiple scattering of light by water cloud droplets with external and internal mixing of black carbon aerosols

王海华,孙贤明   

  1. School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255049, China
  • 收稿日期:2011-08-02 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
  • 基金资助:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2009AQ013).

Multiple scattering of light by water cloud droplets with external and internal mixing of black carbon aerosols

Wang Hai-Hua(王海华) and Sun Xian-Ming(孙贤明)†   

  1. School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255049, China
  • Received:2011-08-02 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
  • Supported by:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2009AQ013).

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摘要： The mixture of water cloud droplets with black carbon impurities is modeled by external and internal mixing models. The internal mixing model is modeled with a two-layered sphere (water cloud droplets containing black carbon (BC) inclusions), and the single scattering and absorption characteristics are calculated at the visible wavelength of 0.55 μm by using the Lorenz--Mie theory. The external mixing model is developed assuming that the same amount of BC particles are mixed with the water droplets externally. The multiple scattering characteristics are computed by using the Monte Carlo method. The results show that when the size of the BC aerosol is small, the reflection intensity of the internal mixing model is bigger than that of the external mixing model. However, if the size of the BC aerosol is big, the absorption of the internal mixing model will be larger than that of the external mixing model.

关键词: aerosols multiple scattering, Monte Carlo method, phase function

Abstract: The mixture of water cloud droplets with black carbon impurities is modeled by external and internal mixing models. The internal mixing model is modeled with a two-layered sphere (water cloud droplets containing black carbon (BC) inclusions), and the single scattering and absorption characteristics are calculated at the visible wavelength of 0.55 μm by using the Lorenz--Mie theory. The external mixing model is developed assuming that the same amount of BC particles are mixed with the water droplets externally. The multiple scattering characteristics are computed by using the Monte Carlo method. The results show that when the size of the BC aerosol is small, the reflection intensity of the internal mixing model is bigger than that of the external mixing model. However, if the size of the BC aerosol is big, the absorption of the internal mixing model will be larger than that of the external mixing model.

Key words: aerosols multiple scattering, Monte Carlo method, phase function

中图分类号:  (Diffraction and scattering)

  • 42.25.Fx
42.25.Bs (Wave propagation, transmission and absorption)