Lidar monitoring of stratospheric aerosol over Tomsk in 2021

Analysis of the data on the annual variability of the vertical-temporal structure of the background aerosol and its integral filling in the stratosphere, obtained at the lidar complex of the high-altitude atmospheric sounding station of the IAO SB RAS in 2020 is studied in this paper in comparison with previous years. Based on the monitoring results, as in previous years, a stable tendency of accumulation of stratospheric aerosol in the cold period of the year was revealed with a maximum content in January and a decrease in the warm period until its practical absence in June-July. In the upper stratosphere (30-50 km), the background aerosol is absent throughout the year.