Calculation and Analysis on Scattering Characteristics of Non-Spherical Particles of Haze

Abstract

Abstract. The light scattering characteristics of sulfate, one of the main pollutant particles in haze, are calculated by T-Matrix method at a target wavelength of 550 nm. The variation between shape factors (such as effective radius and aspect ratio) and scattering phase functions with different types and shapes are analysed in small scale range. The influence of shape factors on scattering cross section and depolarization ratio of particles are also discussed. Results show that the shape of particles has great effects on the spatial distribution of scattering energy, and the scattering properties of particles are sensitive to aspect ratio. The depolarization of spherical particles is close to zero, while the difference between ellipsoidal and cylindrical particles reaches several orders of magnitude. When the equivalent radius is larger than 1.0 μm, the mean depolarization ratio of the non-spherical particles is greater than 0.2. The mean depolarization ratio and scattering cross section of non-spherical particle change continuously with a certain aspect ratio and particle size range, and the shape of some particles can be therefore distinguished under certain conditions.

Near-infrared polarised light transmission characteristics in complex multilayer sea fog environments

“…M. Ji et al analysed the light scattering properties of sulphate particles at a target wavelength of 550 nm using T-matrix calculations. The results showed that the difference in the spatial distribution of the scattered light field mainly depends on the particle shape, that spherical particles hardly affect the polarisation of the light wave, and that the average deconvolution ratio and the scattering cross section of non-spherical particles vary continuously with the particle aspect ratio and the particle size range, so that the deconvolution of the scattered light can be used to distinguish the shape of certain particles under certain conditions [9].…”

Characterization of multi-wavelength polarized light transmission in the real sea spray environment

“…Previous studies have typically utilized haze and water spray scattering environments for simulations and experiments [1][2][3][4][5][6]. K. Chamaillard et al investigated the effect of the shape of dry sea salt particles on the detection of particulate light scattering.…”