University of Oulu

A. Mishev et al 2019 J. Phys.: Conf. Ser. 1181 012061

The upgraded GLE database includes assessment of radiation exposure at flight altitudes

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Author: Mishev, A.1,2; Usoskin, I.1,2; Tuohino, S.3;
Organizations: 1Space Climate Research Unit, University of Oulu, Finland
2Sodankylä Geophysical Observatory, University of Oulu, Finland
3Faculty of Science, University of Oulu, Finland
4Independent researcher, Helsinki, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.6 MB)
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Language: English
Published: IOP Publishing, 2019
Publish Date: 2019-03-27


The exposure to radiation due to cosmic rays at cruising aviation altitudes is an important topic in the field of space weather. While the effect of galactic cosmic rays can be easily assessed on the basis of recent models, assessments of the absorbed dose during strong solar particle events is rather complicated. A specific interest are events with energy about GeV/nucleon, which produce an atmospheric cascade registered by ground based detectors e.g. neutron monitors. Those events are known as ground level enhancements (GLEs) and can significantly enhance the radiation exposure at flight altitudes over the polar regions. A recent upgrade of the existing GLE database provides information on the estimated solar protons energy/rigidity spectra, the corresponding computed effective doses and the used bibliography. Using information retrieved from this upgrade we performed statistical analysis of maximum effective doses at commercial flight altitude of 35 kft during several GLEs, where the necessary information as energy/rigidity spectra of the solar protons is available. For the computations a recent model for assessment of effective dose due to cosmic ray particles was employed. A highly significant correlation between the maximum effective dose rate and neutron monitor peak count rate increase during GLEs is observed. Here, we propose to use the maximal count rate increase as a proxy for assessment of the effective dose at flight altitude during strong solar particle events.

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Series: Journal of physics. Conference series
ISSN: 1742-6588
ISSN-E: 1742-6596
ISSN-L: 1742-6588
Volume: 1181
Article number: 012061
DOI: 10.1088/1742-6596/1181/1/012061
Host publication: 26th Extended European Cosmic Ray Symposium. 6-10 July 2018, Barnaul, Russia
Conference: Extended European Cosmic Ray Symposium
Type of Publication: A4 Article in conference proceedings
Field of Science: 115 Astronomy and space science
Funding: This work was supported by the Academy of Finland (project No. 272157, Center of Excellence ReSoLVE and project No. 267186). This study was supported by VarSITI Program of ICSU Scientific Committee on Solar-Terrestrial Physics (SCOSTEP). We warmly acknowledge all the researchers and NM station managers who collected GLE data and performed the corresponding processing and analysis.
Academy of Finland Grant Number: 272157
Detailed Information: 272157 (Academy of Finland Funding decision)
Copyright information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.