Optika Atmosfery i Okeana Journal

Vol. 38, issue 01, article # 7

Korshunov V. A. Two-component optical model of stratospheric aerosol and its application to interpretation of lidar measurements. // Optika Atmosfery i Okeana. 2025. V. 38. No. 01. P. 56–63. DOI: 10.15372/AOO20250107 [in Russian].
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Abstract:

Biomass burning aerosol has essential effect on radiation properties of the stratosphere. Some known data about this aerosol type are referred to the cases of dense and localized in altitude aerosol layers. Optical properties of it’s background component remain unknown. The processing of two-wavelengths (355 and 532 nm) lidar measurements at Obninsk city in 2012–2023 is fulfilled to determine them. Lidar data interpretation is performed on the basis of two-component model of stratospheric aerosol proposed in this work. Along with the main component (sulfuric acid aerosol), biomass burning aerosol (brown carbon) is considered. As a result, the optical thickness of brown carbon aerosol in 10–30 km layer is estimated at ~0.012 and 0.0013 for extinction at 355 and 532 nm and ~7.1×10^-3 и 3.5×10^-4 for absorption at the same wavelengths. Data presented may be used in the development of advanced radiation models of the stratosphere.

Keywords:

stratospheric aerosol, lidar, biomass burning aerosol, brown carbon, aerosol optical model

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