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

Abstract

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

CLC Number:

P421

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.

References

[1] Haywood J, Bougher O. Estimates of the direct and indirect radiative forcing due to tropospheric aerosols: a review [J]. Rev. Geophys., 2000, 38: 513-543.
[2] Sokolik I N, Winker D, Bergametti G, et al. Introduction to special section on mineral dust: outstanding problems in quantifying the radiative impact of mineral dust [J]. J. Geophys. Res., 2001, 106: 18015-18027.
[3] Martonchik J V, Diner D J. Retrieval of aerosol optical properties from multi-angle satellite imagery [J]. IEEE Trans. Geosci. Remote Sens., 1992, 30: 223-230. [4] King M D, Kaufman Y J, Menzel W P, et al. Remote sensing of cloud, aerosol, and water vapor properties from the moderate resolution imaging spectrometer (MODIS) [J]. IEEE Trans. Geosci. Remote Sens., 1992, 30: 1-27.
[5] Deuze J L, Herman M, Goloub P, et al. Characterization of aerosols over ocean from POLDER/ADEOS-1 [J]. Geophys. Res. Lett., 1999, 26: 1421-1424.
[6] Wang M, Gordon H R. Estimating aerosol optical properties over the oceans with the multiangle imaging spectroradiometers: some preliminary result [J]. Appl. Opt., 1994, 33: 4042-4057.
[7] Wang Haoran, Chen Wenzhong. Aerosol optical properties and modeling study in East China Seas [J]. Journal of Atmospheric and Environmental Optics, 2013, 8: 179-186(in Chinese).
王浩然, 陈文忠. 中国东部海洋大气气溶胶光学性质及其气溶胶模型分析[J]. 大气与环境光学学报, 2013, 8: 179-186.
[8] Han Yongxiang, Xi Xiaoxia, Fang Xiaomin, et al. Dust storm in Asia continent and bio-environment effects in the North Pacific: a case study of the strongest dust event in April 2001 in central Asia [J]. Chinese Science Bulletin, 2005, 50: 2649-2655(in Chinese).
韩永翔, 奚晓霞, 方小敏, 等. 亚洲大陆沙尘过程与北太平洋地区生物环境效应: 以2001年4月中旬中亚特大沙尘暴为例[J]. 科学通报, 2005, 50: 2649-2655.
[9] Koren I, Ganor E, Joseph J H. On the relation between size and shape of desert dust aerosol [J]. J. Geophys. Res., 2001, 106: 18047-18054.
[10] Okada K, Heintzenberg J, Kai K, et al. Shape of atmospheric mineral particles collected in three Chinese arid-regions [J]. Geophys. Res. Lett., 2001, 28: 3123-3126.
[11] West R A, Doose L R, Eibl A M, et al. Laboratory measurements of mineral dust scattering phase function and linear polarization [J]. J. Geophys. Res., 1997, 102: 16871-16881.
[12] Curtis D B, Meland B, Aycibin M, et al. A laboratory investigation of light scattering from representative components of mineral dust aerosols at a wavelength of 550 nm [J]. J. Geophys. Res., 2008, 113: doi:10.1029/2007JD009387.
[13] Kalashnikova O V, Kahn R, Sokolik I N, et al. Ability of multiangle remote sensing observations to identify and distinguish mineral dust types: Optical models and retrievals of optically thick plumes [J]. J. Geophys. Res., 2005, 110, doi:10.1029/2004JD004550.
[14] Mishchenko M I, Travis L D. T-matrix computations of light scattering by large spheroidal particles [J]. Opt. Commun., 1994, 109: 16–21.
[15] Yang P, Feng Q, Hong G, et al. Modeling the scattering and radiative properties of nonshpherical dust-like aerosols [J]. J. Aerosol Sci., 2007, 38: 995-1014. [16] Sun Xianming, Wang Haihua, Liu Wanqiang, et al. Nonspherical model for sand dust storm and its application to the research of light multiple scattering [J]. Acta optica Sinica, 2010, 30(5), 1506-1510(in Chinese).
孙贤明, 王海华, 刘万强, 等. 沙尘暴粒子的非球形模型及其对激光的多次散射特性研究[J]. 光学学报, 2010, 30(5): 1506-1510.
[17] Wei Xiaodong, Zhang Hua. Analysis of optical properties of nonspherical dust aerosols [J]. Acta optica Sinica, 2011, 31(5): 0501002(in Chinese).
卫晓东, 张华. 非球形沙尘气溶胶光学特性的分析 [J]. 光学学报, 2011, 31(5): 0501002.
[18] Dubovik O, Sinyuk A, Lapyonok T, et al. Application of spheroid models to account for aerosol particle nonsphericity in remote sensing of desert dust [J]. J. Geophys. Res., 2006, 111, doi: 10.1029/2005JD006619.
[19] Volten H, Muñoz O, Rol E, et al. Scattering matrices of mineral aerosol particles at 441.6 and 632.8 nm [J]. J. Geophys. Res., 2001, 106: 17375–17401.
[20] De Haan J F, Bosma P B, Hovenier J W. The adding method for multiple scattering calculations of polarized light [J]. Astron. Astrophys., 1987, 183: 371-391. [21] Bi L, Yang P, Kattawar G W, et al. Modeling optical properties of mineral aerosol particles by using non-symmetric hexehedra [J]. Appl. Opt., 2010, 49: 334-342.