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.
Fund: Project supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2009AQ013).
Cite this article:
Wang Hai-Hua(王海华) and Sun Xian-Ming(孙贤明) Multiple scattering of light by water cloud droplets with external and internal mixing of black carbon aerosols 2012 Chin. Phys. B 21 054204
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