Variability of aerosol concentrations of fractions PM10 and PM2.5 in the atmosphere surface layer at the reference monitoring station Boyarsky

Abstract

The paper presents the results of experimental measurements of the aerosols mass concentration PM2.5 and PM10 at the Boyarsky station in May-September 2022. According to the results of measurements and model calculations by Copernicus (CAMS) and Ventusky (SILAM), the seasonal variability of PM2.5 and PM10 aerosol in the atmosphere of Lake Baikal is revealed. The highest concentrations of PM2.5 and PM10 were found in spring (40±18 and 81±34 µg/m 3 ) and summer (20±16 and 26±20 µg/m 3 ), the lowest in autumn (10±5 and 16±11 µg/m 3 ). During the smoke drift, a significant increase in the concentrations of aerosol fractions PM10, PM2.5 and gas impurities NO2, SO2 was noted.