Analysis of sub-GLE and GLE events using NM data : space weather applications
|Author:||Mishev, A.1,2; Usoskin, I.1,2|
1Space Climate Research Unit, University of Oulu, Finland
2Sodankylä Geophysical Observatory, University of Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.9 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019032710183
|Publish Date:|| 2019-03-27
Detailed study of solar energetic particle events is important to understand their acceleration and propagation in the interplanetary space and allows one to model various processes related to space weather and space climate e.g. radiation environment at flight altitudes and atmospheric ionization. A special class of events, called ground level enhancements, registered by ground based detectors, can dramatically change the radiation environment in the Earth's atmosphere. New recently installed high-altitude polar neutron monitors NMs, namely DOMC/B and historically installed South Pole, have made the worldwide neutron monitor network more sensitive to strong solar energetic particle events, registered at ground level. The two high-altitude polar stations are able to detect lower energy events, which most likely would not be registered by the other (near sea level) neutron monitor stations. Here, using the worldwide neutron monitor database (NMDB) records and an optimization procedure combined with simulations, we assess the spectral and angular characteristics of a new class of events sub-GLEs. With the estimated spectral characteristics as an input, we evaluate the effective dose rate in polar and sub-polar regions at typical commercial flight altitude during such events as well as during GLEs.
Journal of physics. Conference series
26th Extended European Cosmic Ray Symposium. 6-10 July 2018, Barnaul, Russia
Extended European Cosmic Ray Symposium
|Type of Publication:||
A4 Article in conference proceedings
|Field of Science:||
115 Astronomy and space science
This work was supported by the Academy of Finland (project No. 272157, Center of Excellence ReSoLVE and project No. 267186). The operation of the DOMC/DOMB NM is supported by the French-Italian Concordia Station (IPEV program n903 and PNRA Project LTCPAA PNRA14 00091), projects CRIPA and CRIPA-X No. 304435 and Finnish Antarctic Research Program (FINNARP).
|Academy of Finland Grant Number:||
272157 (Academy of Finland Funding decision)
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