Stratospheric aerosol, the main component of which are volcanogenic particles, is one of key factors influencing the global climate. The role of aerosol emitted into the stratosphere during wildfires is underestimated. Consideration of the effect of stratospheric aerosol produced by wildfires into climate models leads to significant uncertainties and highlights the need in in-depth study of this phenomenon. This work discusses the results of lidar monitoring of stratospheric aerosol dynamics over Tomsk, Western Siberia, in 2025, with an emphasis on the study of disturbances in the stratospheric aerosol component caused by wildfires. Ground-based lidar sensing in June 2025 detected aerosol layers in the stratosphere over Tomsk at altitudes of 10–17 km. The trajectory analysis and satellite data on wildfires have shown that these aerosol layers could consist of combustion products, including soot transported into the stratosphere by pyrocumulative clouds formed in late May and early June 2025 over severe wildfires covering parts of Canada and the United States. These results are of interest for studying climate changes in Western Siberia.
Romanchenko et al. (Wed,) studied this question.