KIT | KIT-Bibliothek | Impressum | Datenschutz

The impact of an extreme solar event on the middle atmosphere: a case study

Reddmann, Thomas 1; Sinnhuber, Miriam ORCID iD icon 2; Wissing, Jan Maik; Yakovchuk, Olesya; Usoskin, Ilya
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)

Abstract:

A possible impact of an extreme solar particle event (ESPE) on the middle atmosphere is studied for present-day climate and geomagnetic conditions. We consider an ESPE with an occurrence probability of about 1 per millennium. In addition, we assume that the ESPE is followed by an extreme geomagnetic storm (GMS), and we compare the contribution of the two extreme events. The strongest known and best-documented ESPE of 774/5 CE is taken as a reference example and established estimates of the corresponding ionization rates are applied. The ionization rates due to the energetic particle precipitation (EPP) during an extreme GMS are upscaled from analyzed distributions of electron energy spectra of observed GMSs. The consecutive buildup of NOx and HOx by ionization is modeled in the high-top 3D chemistry circulation model KArlsruhe SImulation Model of the middle Atmosphere (KASIMA), using specified dynamics from ERA-Interim analyses up to the stratopause. A specific dynamical situation was chosen that includes an elevated stratosphere event during January and maximizes the vertical coupling between the northern polar mesosphere–lower thermosphere region and the stratosphere; it therefore allows us to estimate a maximum possible impact. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000160902
Veröffentlicht am 26.07.2023
Originalveröffentlichung
DOI: 10.5194/acp-23-6989-2023
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 30.06.2023
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000160902
HGF-Programm 12.11.28 (POF IV, LK 01) The role of the near-Earth space
Weitere HGF-Programme 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Erschienen in Atmospheric Chemistry and Physics
Verlag European Geosciences Union (EGU)
Band 23
Heft 12
Seiten 6989–7000
Projektinformation ROMIC-II SOLCHECK (BMBF, 01LG1906D)
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 23.06.2023
Nachgewiesen in Scopus
Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page