Simulation of radiative forcing of smoke aerosol in the Arctic using measurements in the large aerosol chamber of Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences
I.M. Nasrtdinov1, P.N. Zenkova1, T.B. Zhuravleva1, V.N. Uzhegov1, I.B. Konovalov2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia
Keywords: pyrolysis and mixed smokes, aerosol optical characteristics, temporal variability, aerosol radiative forcing, Arctic
Abstract
The results of experiments carried out in the Large Aerosol Chamber of IAO SB RAS during 2021-2022 to study the optical characteristics of smoke aerosol with a long aging time (up to 2-3 days) are presented. The influence of the evolution of optical characteristics of pyrolysis and mixed smokes on the radiative forcing of smoke aerosol (RFA) at the top of atmosphere in the Arctic region in summer is estimated. It is shown that for pyrolysis smokes, the main factor that determines the time dependence of RFA is the evolution of the aerosol optical thickness, while for mixed smokes, it is also necessary to take into account the temporal variability of the single scattering albedo of aerosol particles. The dependence of RFA on underlying surface types and illumination conditions typical for the Arctic region is considered for different modes of biomass combustion.
|
