可见光波段非球形沙尘气溶胶散射和辐射特性的理论模拟

大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (1): 1-10.

• 大气光学 • 下一篇

可见光波段非球形沙尘气溶胶散射和辐射特性的理论模拟

冯倩, 邹斌, 赵崴

(国家卫星海洋应用中心，北京 100081)

收稿日期:2014-06-10 修回日期:2014-07-01 出版日期:2015-01-28 发布日期:2015-01-09
通讯作者: 冯倩（1976-），男，山东乳山人，博士，研究员，主要从事大气海洋遥感方面的研究。 E-mail:fengqian@mail.nsoas.gov.cn
作者简介:冯倩（1976-），男，山东乳山人，博士，研究员，主要从事大气海洋遥感方面的研究。
基金资助:
国家自然科学基金(41276181)资助

Theoretical Simulation of Scattering and Radiative Properties of Nonspherical Dust Aerosols at Visible Wavelength

FENG Qian, ZOU Bin, ZHAO Wei

(National Satellite Ocean Application Service, Beijing 100081, China)

Received:2014-06-10 Revised:2014-07-01 Published:2015-01-28 Online:2015-01-09

摘要/Abstract

摘要：

将非球形沙尘气溶胶视为具有一定的尺度谱和形状分布的随机取向椭球粒子群，利用T矩阵和改进几何光学方法（IGOM）模拟了非球形沙尘气溶胶粒子在可见光波段（0.47 ）的散射特性，并与实验室测量结果和等体积球形粒子的计算结果进行了比较。结果表明：利用具有一定的尺度谱和形状分布的随机取向椭球粒子模拟自然界中的非球形沙尘粒子散射特性是行之有效的；用等体积球形粒子得到的单散射相矩阵（特别是单散射相函数）与椭球粒子相比，具有明显的差异，而粒子形状对单散射反照率、不对称因子和消光效率的影响明显偏小。通过比较椭球和球形沙尘气溶胶在可见光波段的辐射特性说明在计算非球形沙尘气溶胶辐射特性过程中应考虑粒子形状对其单散射特性的影响。

关键词: 沙尘气溶胶, 非球形, 几何光学, 单散射

Abstract:

With the assumption that nonspherical mineral dust aerosols are considered to be a mixture of randomly oriented spheroidal particles with particle size and shape distributions, the scattering properties of nonspherical mineral dust aerosols at visible wavelength (0.47 um) are theoretically simulated based on the T-matrix method and improved geometric optics method (IGOM). The corresponding results related to laboratory measurements and equal volume spherical particles are also presented for comparison. The results indicate that it is feasible to simulate the scattering properties of nonspherical dust aerosols by considering dust particles to be a mixture of randomly oriented spheroidal particles with particle size and shape distributions, and the differences between equal volume spherical particles and spheroidal particles are obvious for single scattering phase matrix (especially single scattering phase function) when compared with the differences associated with single-scattering albedo, asymmetry factor and extinction efficiency. Moreover, by comparing the radiative properties of dust aerosols at the visible wavelength for spheroid and sphere particle shape assumption, it is found that the effect of particle shape on the single scattering properties cannot be neglected in simulating the radiative properties of nonspherical dust aerosols.

Key words: dust aerosols, nonspherical, geometric optics, single scattering

中图分类号:

P421

冯倩邹斌赵崴. 可见光波段非球形沙尘气溶胶散射和辐射特性的理论模拟[J]. 大气与环境光学学报, 2015, 10(1): 1-10.

FENG Qian, ZOU Bin, ZHAO Wai. Theoretical Simulation of Scattering and Radiative Properties of Nonspherical Dust Aerosols at Visible Wavelength[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(1): 1-10.

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可见光波段非球形沙尘气溶胶散射和辐射特性的理论模拟

Theoretical Simulation of Scattering and Radiative Properties of Nonspherical Dust Aerosols at Visible Wavelength

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