Enhancement of stratospheric aerosols after solar proton event

• Main Authors: Shumilov, O. I., Kasatkina, E. A., Henriksen, K., Vashenyuk, E. V.
• Other Authors: High-Latitude Geophysical Laboratory of St. Petersburg, Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences Moscow (RAS)-Russian Academy of Sciences Moscow (RAS), The Auroral Observatory, University of Tromsø (UiT), Polar Geophysical Institute of Russian Academy of Sciences (PGI), Russian Academy of Sciences Moscow (RAS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1996
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; Kola Peninsula; kola peninsula
• Online Access: https://hal.science/hal-00316221; https://hal.science/hal-00316221/document; https://hal.science/hal-00316221/file/angeo-14-1119-1996.pdf

International audience The lidar measurements at Verhnetulomski observatory (68.6°N, 31.8°E) at Kola peninsula detected a considerable increase of stratospheric aerosol concentration after the solar proton event of GLE (ground level event) type on the 16/02/84. This increase was located at precisely the same altitude range where the energetic solar protons lost their energy in the atmosphere. The aerosol layer formed precipitated quickly (1?2 km per day) during 18, 19, and 20 February 1984, and the increase of R ( H ) (backscattering ratio) at 17 km altitude reached 40% on 20/02/84. We present the model calculation of CN (condensation nuclei) altitude distribution on the basis of an ion-nucleation mechanism, taking into account the experimental energy distribution of incident solar protons. The meteorological situation during the event was also investigated.