Simulation of multi-wavelength depolarization characteristics of dust aerosol particles

Fig. 1. Super-ellipsoid model with different roundness parameters (a = b = c). (a) n₁ = 1.5, n₂ = 0.2; (b) n₁ = 2, n₂ = 0.8; (c) n₁ = 3, n₂ = 1.5; (d) n₁ = 3, n₂ = 3

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Fig. 2. Depolarization ratio of non-spherical particles

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Fig. 3. Depolarization ratio of super-ellipsoid particles at different incident wavelengths. (a) Depolarization ratio versus effective radius; (b) depolarization ratio varies with scale parameters

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Fig. 4. Particle spectrum distribution of dust aerosol particles with different modes

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Fig. 5. Variation of depolarization ratio of dust aerosol partides with increasing axial ratio at multi wavelengths

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Fig. 6. Variation of depolarization ratio with increasing axial ratio at multi wavelength

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Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode^［6］
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Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode^［6］
D 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Aspect ratio distribution 0.535 0.289 0.108 0.040 0.015 0.007 0.003 0.001 0.001 0.001

Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode^［6］
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Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode^［6］
D 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Aspect ratio distribution 0.103 0.234 0.218 0.157 0.101 0.065 0.041 0.027 0.018 0.036

Table 3. Depolarization ratio of dust aerosol particles observed in literature

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Table 3. Depolarization ratio of dust aerosol particles observed in literature

Location	Date	Lidar	Depolarization ratio
Location	Date	Lidar	355 nm	532 nm	1064 nm
Midwest	2014-07-13	HSRL	0.246 ± 0.018	0.304 ± 0.005	0.270 ± 0.005
Chihuahuan	2013-02-08	HSRL	0.243 ± 0.046	0.373 ± 0.014	0.383 ± 0.006
Caribbean	2010-08-18	HSRL		0.327 ± 0.018	0.278 ± 0.012
Pico de Orizaba	2006-03-16	HSRL		0.334 ± 0.018	0.400 ± 0.009
Barbados	2013―2014	BERTHA		0.28 ± 0.02	0.225 ± 0.02
Tajikistan	2015―2016	Raman	0.18 - 0.29	0.31 - 0.35	–

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Ying WANG, Dong LIU. Simulation of multi-wavelength depolarization characteristics of dust aerosol particles[J]. Journal of Atmospheric and Environmental Optics, 2023, 18(5): 458

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Paper Information

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Received: Apr. 23, 2021

Accepted: --

Published Online: Dec. 1, 2023

The Author Email:

DOI:10.3969/j.issn.1673-6141.2023.05.006

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode［6］

Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode［6］

Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode［6］

Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode［6］

Table 3. Depolarization ratio of dust aerosol particles observed in literature

Table 3. Depolarization ratio of dust aerosol particles observed in literature

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Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode^［6］

Table 1. Aspect ratio distribution of sand dust aerosol particles in nuclear mode^［6］

Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode^［6］

Table 2. Aspect ratio distribution of sand dust aerosol particles in accumulation mode^［6］