Lidar observations of wildfire smoke in the stratosphere over Tomsk in June 2025
I.I. Romanchenko1,2, V.N. Marichev3, P.V. Novikov4, D.B. Bochkovsky3, A.A. Cheremisin3
1V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
3V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
4Irkutsk State Transport University, Krasnoyarsk Railway Institute, Krasnoyarsk, Russia
Keywords: stratosphere, pyrocumulonimbus cloud, soot aerosol, trajectory analysis, wildfire, lidar
Abstract
Stratospheric aerosol, the main component of which is volcanic emissions, is one of the main factors influencing global climate. The role of aerosol formed during wildfires and injected into the stratosphere is clearly underestimated. Taking into account the influence of stratospheric aerosol generated by wildfires into climate models leads to significant uncertainties and highlights the need for an in-depth study of this phenomenon. This paper presents the results of lidar monitoring of stratospheric aerosol dynamics over Tomsk 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. Using trajectory analysis and satellite data on fires, it was shown that the possible source of the observed aerosol layers could be combustion products, including soot injected into the stratosphere by pyrocumulative clouds formed in late May and early June 2025 in the area of severe wildfires covering parts of Canada and the United States. These results are of interest for climate change research in Western Siberia.
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