Issue |
J. Space Weather Space Clim.
Volume 15, 2025
|
|
---|---|---|
Article Number | 3 | |
Number of page(s) | 18 | |
DOI | https://doi.org/10.1051/swsc/2024039 | |
Published online | 24 January 2025 |
Technical Article
Towards advanced forecasting of solar energetic particle events with the PARASOL model
1
Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
2
Centre for mathematical Plasma Astrophysics, KU Leuven Campus Kulak, 8500 Kortrijk, Belgium
* Corresponding author: alexandr.afanasiev@utu.fi
Received:
6
July
2024
Accepted:
10
December
2024
Gradual solar energetic particle (SEP) events are generally attributed to the particle acceleration in shock waves driven by coronal mass ejections (CMEs). Space-weather effects of such events are important, so there has been continuous effort to develop models able to forecast their various characteristics. Here we present the first version of a new such model with the primary goal to address energetic storm particle (ESP) events. The model, PARASOL, is built upon the PArticle Radiation Asset Directed at Interplanetary Space Exploration (PARADISE) test-particle simulation model of SEP transport, but includes a semi-analytical description of an inner (i.e., near the shock) part of the foreshock region. The semi-analytical foreshock description is constructed using simulations with the SOLar Particle Acceleration in Coronal Shocks (SOLPACS) model, which simulates proton acceleration self-consistently coupled with Alfvén wave generation upstream of the shock, and subsequent fitting of the simulation results with suitable analytical functions. PARASOL requires input of solar wind and shock magnetohydrodynamic (MHD) parameters. We evaluate the performance of PARASOL by simulating the 12 July 2012 SEP event, using the EUropean Heliospheric FORecasting Information Asset (EUHFORIA) MHD simulation of the solar wind and CME in this event. The PARASOL simulation has reproduced the observed ESP event (E ≲ 5 MeV) in the close vicinity of the shock within one order of magnitude in intensity.
Key words: Solar energetic particles / Space weather / Shock wave
© A. Afanasiev et al., Published by EDP Sciences 2025
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