Effect of smoke contamination on the aerosol microstructure assessed from the data of inverting the spectral characteristics of light extinction in the near-ground layer and the atmospheric column

V. V. Veretennikov; S. S. Men’shchikova; V. N. Uzhegov

doi:10.1117/12.2540761

18 December 2019 Effect of smoke contamination on the aerosol microstructure assessed from the data of inverting the spectral characteristics of light extinction in the near-ground layer and the atmospheric column

V. V. Veretennikov, S. S. Men’shchikova, V. N. Uzhegov

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Proceedings Volume 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 112084L (2019) https://doi.org/10.1117/12.2540761
Event: XXV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2019, Novosibirsk, Russian Federation

Abstract

The peculiarities of the aerosol microstructure in the near-ground layer and in the atmospheric column when smoke inflows into the atmosphere are studied. The parameters of aerosol microstructure were determined from the solution of the inverse problem for spectral aerosol extinction coefficients measured by the path method and the aerosol optical thickness measured by means of a sun-photometer in a clean atmosphere and when it was filled with smoke in the Tomsk region. The geometrical cross-section, volume concentration, and mean radius of particles of submicron and coarse aerosol fractions were calculated. Under background conditions, the coarse fraction prevails in the total aerosol volume. When air is filled with smoke, the submicron fraction of aerosol particles becomes dominant in the total aerosol volume. As a result, the particle radius averaged over the total ensemble decreases in a smoke-contaminated atmosphere. Also, when the atmosphere is filled with smoke, the nature of the regression relations between the microstructural parameters of different aerosol fractions and the spectral characteristics of the aerosol extinction of light significantly change.

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V. V. Veretennikov, S. S. Men’shchikova, and V. N. Uzhegov "Effect of smoke contamination on the aerosol microstructure assessed from the data of inverting the spectral characteristics of light extinction in the near-ground layer and the atmospheric column", Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112084L (18 December 2019); https://doi.org/10.1117/12.2540761

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KEYWORDS

Aerosols

Atmospheric particles

Atmospheric optics

Inverse problems

Contamination

Combustion

Atmospheric modeling

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