University of Oulu

Mishev, Alexander & Velinov, Peter I. Y. (2018) Ionization effects in the middle stratosphere due to cosmic rays during strong GLE events. Comptes rendus de l’Acade'mie bulgare des Sciences, Vol 71, No4, pp.523-528,

Ionization effects in the middle stratosphere due to cosmic rays during strong GLE events

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Author: Mishev, Alexander1,2; Velinov, Peter I. Y.3
Organizations: 1Space Climate Research Unit, University of Oulu, P.O.Box 8000, FI-90014 University of Oulu, Finland
2Sodankylä Geophysical Observatory, University of Oulu, Tähteläntie 62, 99600 Sodankylä, Finland
3Institute for Space Research and Technology, Bulgarian Academy of Sciences, Sofia, Bulgaria
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
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Language: English
Published: Marin Drinov Academic Publishing House, 2018
Publish Date: 2018-05-15


An important topic in the field of solar-terrestrial and space physics is the highly discussed possible effect of cosmic ray (CR) particles on atmospheric chemistry and physics, specifically by induced ionization. In most of the recently developed models, the induced by CRs atmospheric ionization plays a significant role. Nowadays, it is clear that the contribution of galactic cosmic ray particles to electron-ion production in the atmosphere slightly varies with the solar modulation and transient effects. On the other hand, high energy solar particles could produce complicated hadron-electromagnetic-muon cascade in the atmosphere of the Earth and significantly enhance the electron-ion pair production, particularly over polar caps. This effect is usually strong on a short time scales, being more important in the region of Regener–Pfotzer maximum. However, for some atmospheric chemistry and physics purposes it is important to estimate the ionization effect in the middle stratosphere. The Ground Level Enhancement GLE 59 on Bastille Day 14 of July 2000 and the maverick GLE 70 on 13 December 2006 are among the strongest recorded events during the previous solar cycle 23. Herein, using recently proposed full target Monte Carlo simulation and previously derived high energy solar particles energy spectra we estimated the electron-ion production rate and corresponding ionization effect in the Earth middle stratosphere during two moderately strong ground level enhancement events.

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Series: Proceedings of the Bulgarian Academy of Sciences
ISSN: 1310-1331
ISSN-E: 2367-5535
ISSN-L: 1310-1331
Volume: 71
Issue: 4
Pages: 523 - 528
DOI: 10.7546/CRABS.2018.04.11
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: This work is supported by ReSoLVE center of excellence Project No 272157 of Academy of Finland.
Academy of Finland Grant Number: 272157
Detailed Information: 272157 (Academy of Finland Funding decision)
Copyright information: © 2018 The Authors and BAN. Published in this repository with the kind permission of the publisher.