Dynamics of optical-microphysical characteristics of smokes from Siberian wildfires in the Big Aerosol Chamber at the stages of smoke generation and aging

V. S. Kozlov; I. B. Konovalov; V. N. Uzhegov; D. G. Chernov; Vas. V. Pol’kin; P. N. Zenkova; E. P. Yausheva; V. P. Shmargunov; S. N. Dubtsov

doi:10.1117/12.2575499

12 November 2020 Dynamics of optical-microphysical characteristics of smokes from Siberian wildfires in the Big Aerosol Chamber at the stages of smoke generation and aging

V. S. Kozlov, I. B. Konovalov, V. N. Uzhegov, D. G. Chernov, Vas. V. Pol’kin, P. N. Zenkova, E. P. Yausheva, V. P. Shmargunov, S. N. Dubtsov

Author Affiliations +

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 1156046 (2020) https://doi.org/10.1117/12.2575499
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

The optical-microphysical characteristics of smokes from forest combustible materials with different contributions of flaming and smoldering combustion of biomass with 48-h ageing under dark conditions have been studied in the Big Aerosol Chamber of the Institute of Atmospheric Optics (IAO). The dynamics of spectral dependences of aerosol extinction coefficients at wavelengths of 0.45-3.9 µm, scattering and absorption coefficients at 0.46-0.63 µm, aerosol extinction, scattering, and absorption Angstrom exponents, Black Carbon (BC) mass concentration and relative BC content, and single scattering albedo was analyzed. Characteristics of model smokes have been compared with data for smoke plumes from remote Siberian wildfires to assess the mean values of the parameter of mixture of flaming/smoldering modes closest to the actual pattern of absorption properties of remote wildfires. A system for imitation of solar UV irradiation have been deployed in the Big Aerosol Chamber (BAC), and test experiments on generation of secondary organic aerosol under UV irradiation of the near-surface air pumped into BAC have been conducted.

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V. S. Kozlov, I. B. Konovalov, V. N. Uzhegov, D. G. Chernov, Vas. V. Pol’kin, P. N. Zenkova, E. P. Yausheva, V. P. Shmargunov, and S. N. Dubtsov "Dynamics of optical-microphysical characteristics of smokes from Siberian wildfires in the Big Aerosol Chamber at the stages of smoke generation and aging", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 1156046 (12 November 2020); https://doi.org/10.1117/12.2575499

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