Calculated Mie Scattering Properties in the Visible and Infrared of
Measured Los Angeles Aerosol Size Distributions

Franklin S. Harris

doi:10.1364/AO.11.002697

Applied Optics
Vol. 11,
Issue 11,
pp. 2697-2705
(1972)
•https://doi.org/10.1364/AO.11.002697

Calculated Mie Scattering Properties in the Visible and Infrared of Measured Los Angeles Aerosol Size Distributions

Franklin S. Harris

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Franklin S. Harris, "Calculated Mie Scattering Properties in the Visible and Infrared of Measured Los Angeles Aerosol Size Distributions," Appl. Opt. 11, 2697-2705 (1972)

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Abstract

Aerosol size distributions of varying types selected from those measured in clear air, smog, and fog in the Los Angeles Basin have been used with Lorenz-Mie scattering theory to predict radiation scattering by aerosols. Eleven different indices of refraction were assumed for wavelengths from 0.488 μm to 8.4 μm for aerosol materials with varying humidity, and for water and quartz. The effect on the scattering by the type of size distribution and the complex index of refraction is shown as a function of the polarization parameters of polarization, polarization ratio, ellipticity, and the inclination angle of the polarization ellipse.

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Case	Date	Location	Run	Temperature (°C)	Relative humidity (%)	Wind (km/h)	Remarks
1	6 Oct. 1969 10:30	Mt. Wilson	1	20	13	1.6 at 180°	Slightly hazy over city
2	6 Oct. 1969 11:08	Mt. Wilson	2	21	7	8 at 180°	Slightly hazy over city
3	30 Sept. 1969 8:34	Eaton Canyon	Dil	—	43	3 at 160°	Sunny and clear
4	30 Oct. 1969 9:30	Sunland	7	23	19	3 at 90°	Some haze
5	6 Oct. 1969 14:40	Mt. Wilson	10	20	10	5 at 180°	Haze over city
6	29 Oct. 1969 9:40	Marineland	2	16	81	16 at 270°	Foggy out to sea
7	30 Oct. 1969 7:25	Granada Hills	3	20	13	10 at 135°	Smell of smoke
8	30 Sept. 1969 11:30	Eaton Canyon	12	31	27	7 at 160°	Sunny, hazy
9	30 Oct. 1969 6:55	Newhall	2	8	29	8 at 135°	Clear
10	29 Oct. 1969 10:00	Marineland	3	18	73	16 at 270°	Fog clearing
11	29 Oct. 1969 12:45	Torrance Beach	9	19	65	5 at 270°	Vis. 1.6 km on sea side

Wavelength (μ)	Index of refraction and material
0.488	1. 355–0.000i aerosol with 96% relative humidity
	1.58–0.000i aerosol with 40% relative humidity
	1.72–0.000i aerosol, dry
	1.50–0.01 Mainz aerosol
1.06	1.325–0.000i water	1.53–0.000i quartz
2.9	1.310–0.2435i water	1.49–0.000i quartz
3.2	1.509–0.094i water	1.49–0.000i quartz
8.4	1.287–0.0373i water	0.09642–0.98098i quartz

Case	Date	Location	Run	Temperature (°C)	Relative humidity (%)	Wind (km/h)	Remarks
1	6 Oct. 1969 10:30	Mt. Wilson	1	20	13	1.6 at 180°	Slightly hazy over city
2	6 Oct. 1969 11:08	Mt. Wilson	2	21	7	8 at 180°	Slightly hazy over city
3	30 Sept. 1969 8:34	Eaton Canyon	Dil	—	43	3 at 160°	Sunny and clear
4	30 Oct. 1969 9:30	Sunland	7	23	19	3 at 90°	Some haze
5	6 Oct. 1969 14:40	Mt. Wilson	10	20	10	5 at 180°	Haze over city
6	29 Oct. 1969 9:40	Marineland	2	16	81	16 at 270°	Foggy out to sea
7	30 Oct. 1969 7:25	Granada Hills	3	20	13	10 at 135°	Smell of smoke
8	30 Sept. 1969 11:30	Eaton Canyon	12	31	27	7 at 160°	Sunny, hazy
9	30 Oct. 1969 6:55	Newhall	2	8	29	8 at 135°	Clear
10	29 Oct. 1969 10:00	Marineland	3	18	73	16 at 270°	Fog clearing
11	29 Oct. 1969 12:45	Torrance Beach	9	19	65	5 at 270°	Vis. 1.6 km on sea side

Wavelength (μ)	Index of refraction and material
0.488	1. 355–0.000i aerosol with 96% relative humidity
	1.58–0.000i aerosol with 40% relative humidity
	1.72–0.000i aerosol, dry
	1.50–0.01 Mainz aerosol
1.06	1.325–0.000i water	1.53–0.000i quartz
2.9	1.310–0.2435i water	1.49–0.000i quartz
3.2	1.509–0.094i water	1.49–0.000i quartz
8.4	1.287–0.0373i water	0.09642–0.98098i quartz

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Applied Optics