Observations of stratosphere aerosol at lidar stations of Roshydromet after the eruption of the submarine Hunga Tonga volcano in January 2022
V.N. Ivanov1, V.S. Grebennikov2, V.A. Korshunov1, D.G. Sakhibgareev2
1Russian Federal Service on Hydrometeorology and Environmental Monitoring Research and Production Association В«Typhoon», Obninsk, Russia
2Central Aerospace Observatory, Dolgoprudny, Russia
Keywords: stratospheric aerosol, lidar sensing, Hunga Tonga volcano
Abstract
The observations of stratospheric aerosol layers at the lidar stations of Roshydromet in Sankt-Peterburg (59.9° N), Obninsk (55.1° N), and Znamensk (48.6° N) some months after the explosive eruption of the submarine Hunga Tonga (21° S, 175° W) volcano in January 2022 are presented. Aerosol layers at 20-24 km altitudes are observed in April, May, and October with a backscattering ratio of 1.2-1.4. The degree of depolarization at 532 nm and the ratio of the backscattering coefficients at 355 and 532 nm wavelengths show that aerosol consists of submicron spherical particles. The observation results are compared with known data on Hunga Tonga aerosol propagation.
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