Effects of aggregation on scattering and radiative properties of soot aerosols
Effects of aggregation on scattering and radiative properties of soot aerosols
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DOI：
10.1029/2004jd005649
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发表时间：
2005-06
影响因子：
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通讯作者：
Li Liu;Li Liu;M. Mishchenko
中科院分区：
文献类型：
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作者：
Li Liu;Li Liu;M. Mishchenko
[1]用叠加T-矩阵方法计算了在可见光波长0.628μm处各种随机取向的类分形烟尘聚集体的散射矩阵元和光学截面，分析了分维和前因子、单体半径、聚集体中单体数目和折射率对聚集烟尘粒子光散射和吸收的影响。结果表明，在假设单体之间不存在电磁相互作用的情况下，单体的构型可以有很大的影响，聚集可以导致消光和散射的显著增强，而不是用Lorenz-Mie理论计算的结果。因此，在辐射传输建模和遥感应用中必须考虑烟尘聚集和团簇形态的影响。
[1] The superposition T-matrix method is used to compute the scattering matrix elements and optical cross sections for a wide variety of fractal-like soot aggregates in random orientation at a visible wavelength 0.628 μm. The effects of the fractal dimension and prefactor, the monomer radius, the number of monomers in the aggregate, and the refractive index on light scattering and absorption by aggregated soot particles are analyzed. It is shown that the configuration of the monomers can have a substantial effect and that aggregation can result in a significant enhancement of extinction and scattering relative to those computed from the Lorenz–Mie theory, assuming that there are no electromagnetic interactions between the monomers. Thus one must take the effects of soot agglomeration and cluster morphology into account in radiative transfer modeling and remote sensing applications.