The scattering matrix for size distributions of irregular particles: An application to an olivine sample
- 作者：F. Moreno ; R. Vilaplana ; O. Muñ ; oz ; A. Molina and D. Guirado
- 关键词：Single scattering ; Scattering matrix ; Nonspherical particles ; Mineral aerosols ; Discrete-dipole approximation ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVR-4HWXD7K-K&_mathId=mml19&
- 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
- 出版年：2006
- 期刊代码：70_00224073
- 类别：ch
- 出版时间：July-August 2006
- 卷：100
- 期：1-3
- 页码：277-287
- 文件大小：436 K
摘要
We have compared simulated and measured scattering matrices of a size distribution of olivine particles at wavelengths of 633 and 442 nm. The computations were carried out for size distributions of irregularly-shaped compact particles with different average projected areas using the discrete-dipole approximation (DDA). The results of the comparison show that the model of irregularly-shaped particles mimic the observations far better than the results given by spheres, spheroids or rectangular prisms having a wide range in aspect ratios. The computed scattering matrices for size distributions of irregularly-shaped particles do not depend very strongly on the precise particle shape assumed, providing a method to infer certain physical properties of an ensemble of natural dust particles, such as the refractive index, when some information on the sample, as the size distribution, is known a priori.