利用T-matrix计算非球形粒子散射特性的研究

本文用T-matrix方法计算了非球形气溶胶粒子的光学特性,得到了气溶胶粒子的消光截面、散射截面、吸收截面与气溶胶粒子形状的关系,不同形状气溶胶粒子的有着相同的散射相函数和不同的偏振度,非球形气溶胶粒子的散射相函数对其复折射指数的实部和虚部都不太敏感,而偏振相函数对其实部和虚部都比较敏感.此结论为研究大气辐射传输提供了较好的方法,尤其是偏振度与偏振相函数的提出为用偏振的方法进一步的反演气溶胶的光学参数提供了理论基础.

Based on T-matrix method studied scattering characteristics of non-spherical particles

In this paper, the non-spherical aerosol optical characterization was calculated using the T-matrix theory. the relationship between the shape of aerosol particles and Extinction cross section, scattering cross section and absorption cross section of aerosol particles are shown. The shaped aerosol particle have the same scattering phase function and different degree of polarization.The real part and imaginary part of complex refactive index is not sensitive to the scattering phase function of non-spherical particals and is sensitive to polarization phase function of non-spherical particals.These results provide a better method to study RTE, especially the degree of polarization and polarization phase functions provide the theories basia for inversion aerosol optical parameters using polarization method.