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Exceptional middle latitude electron precipitation detected by balloon observations: implications for atmospheric composition

Mironova, Irina; Sinnhuber, Miriam ORCID iD icon; Bazilevskaya, Galina; Clilverd, Mark; Funke, Bernd; Makhmutov, Vladimir; Rozanov, Eugene; Santee, Michelle L.; Sukhodolov, Timofei

Abstract (englisch):

Energetic particle precipitation leads to ionization in the Earth's atmosphere, initiating the formation of active chemical species which destroy ozone and have the potential to impact atmospheric composition and dynamics down to the troposphere. We report on one exceptionally strong high-energy electron precipitation event detected by balloon measurements in middle latitudes on 14 December 2009 with ionization rates locally comparable to strong solar proton events. This electron precipitation was likely caused by wave-particle interactions in the slot region between the inner and outer radiation belts, connected with still not well understood natural phenomena in the magnetosphere. Satellite observations of odd nitrogen and nitric acid are consistent with wide-spread electron precipitation into magnetic midlatitudes. Simulations with a 3D chemistry-climate model indicate almost complete destruction of ozone in the upper mesosphere over the region where high-energy electron precipitation occurred. Such an extraordinary type of energetic particle precipitation can have major implications for the atmosphere, and their frequency and strength should be carefully studied.

Preprint §
DOI: 10.5445/IR/1000138279
Veröffentlicht am 02.11.2021
DOI: 10.5194/acp-2021-737
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.09.2021
Sprache Englisch
Identifikator ISSN: 1680-7367, 1680-7375
KITopen-ID: 1000138279
HGF-Programm 12.11.28 (POF IV, LK 01) The role of the near-Earth space
Erschienen in Atmospheric chemistry and physics / Discussions
Verlag European Geosciences Union (EGU)
Nachgewiesen in Dimensions
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