Comparison of modeling of the polar cap absorption effect with observations at the AARI ground-based network
Journal Title: Solar-Terrestrial Physics - Year 2024, Vol 10, Issue 3
Abstract
An elliptical model of cutoff for solar cosmic rays (SCR) at high latitudes has been calculated for SCR events and geomagnetic storms that occurred in February, March, and September 2014, June 2015, and September 2017 in order to predict the polar cap absorption (PCA) effect. The prediction is compared with observations of the PCA effect at the AARI network of six ionosondes, located in the north of Russia in a wide range of longitudes from 30 to 170 and magnetic latitudes from 56 to 64. We examine the dependence of the cutoff latitude on the magnetic storm strength, as well as the effect of additional ionization of the dayside and nightside ionosphere by SCR protons and electrons. The model demonstrates a satisfactory statistical accuracy up to 0.83 for the PCA prediction. We discuss prospects for further improvement of the elliptical model, such as consideration of the impact of SCRs of higher energies and inclusion of the PC index of energy flux into the polar cap.
Authors and Affiliations
Dmitriev A. V. , Dolgacheva S. A. , Troshichev O. A. , Pulinets M. S.
Keywords
Related Articles
- EP ID EP753796
- DOI 10.12737/stp-103202413
- Views 39
- Downloads 0
COMPARATIVE ANALYSIS OF VARIABILITY IN THE MID-LATITUDE STRATOSPHERE AND IONOSPHERE IN WINTER PERIODS
In this work, we perform a joint analysis of the spatial-temporal dynamics of ionospheric and stratospheric variability (with scales characteristic of internal gravity waves) at different longitudes of midlatitudes of th...
FINE STRUCTURE EVENTS IN MICROWAVE EMISSION DURING SOLAR MINIMUM
The solar minimum is a period with a relatively smaller number of sunspots and solar eruptions, and has been less studied before. Since the radio signal rapidly responds to the change of solar plasma and magnetic field,...
Ionospheric response over the high and middle latitude regions of Eurasia according to ionosonde data during the severe magnetic storm in March 2015
We have analyzed spatial and temporal variations in ionospheric parameters over high and middle latitudes of Eurasia, using data from chains of high- and mid-latitude ionosondes during a severe magnetic storm in March 20...
STUDYING THE RESPONSE OF THE MID-LATITUDE IONOSPHERE OF THE NORTHERN HEMISPHERE TO MAGNETIC STORMS IN MARCH 2012
We have studied variations in ionospheric and geomagnetic parameters in the Northern Hemisphere during a series of magnetic storms in March 2012 by analyzing data from the Eurasian mid-latitude ionosonde chain, mid- and...
COMPARING METHODS TO ESTIMATE CLOUD COVER OVER THE BAIKAL NATURAL TERRITORY IN DECEMBER 2020
The paper addresses the issue of how much cloud cover data obtained using satellite and model-interpolation techniques are suitable for monitoring the transparency of the atmosphere and determining conditions for airglow...