Stratospheric aerosol from Siberian forest fires according to lidar observations in July 2022 in Tomsk
I.I. Romanchenko1,2, A.A. Cheremisin1, P.V. Novikov3, V.N. Marichev4, D.A. Bochkovsky4
1V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
3Irkutsk State Transport University, Krasnoyarsk Railway Institute, Krasnoyarsk, Russia
4V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: stratosphere, pyrocumulonimbus cloud, soot aerosol, volcanic aerosol, trajectory analysis, satellite sounding, lidar
Abstract
Soot aerosol from forest fires injected into the stratosphere can influence climate on a global scale, similar to volcanic aerosol. This paper examined the stratospheric loading with soot aerosol from forest fires in Eastern Siberia, as well as the occurrence of volcanic aerosol over Western Siberia. An episode of ground-based lidar observation in July 2022, where aerosol layers were detected in the stratosphere above Tomsk at approximately 11 km and 20-25 km is considered. The origin of these layers is analyzed using air mass trajectories with control of their aerosol content based on data from the CALIPSO satellite lidar and using atmospheric and surface sensing data from the Suomi-NPP and Himawari-8 satellites. It is shown that the sources of in the lower stratosphere aerosol loading at an altitude of about 11 km are the fires in Eastern Siberia, which led to the formation of powerful pyrocumulative clouds. The location and time of formation of these clouds are determined. It is also shown that the aerosol layers at altitudes 20-25 km are associated with the eruption of the Hunga Tonga-Hunga Ha'apai volcano, which erupted in the Southern Hemisphere in January 2022. The results are of significant interest for predicting climate change on regional and global scales.
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