High-latitude ionosphere during magnetic storms of October 26, 2003–November 1, 2003: Tomographic reconstructions and numerical modeling

The height-latitude distributions of the electron density in the European Arctic sector of the subauroral and high-latitude ionosphere have been reconstructed based on the data of satellite radio tomography. The reconstructions have been compared with the results of the numerical modeling obtained u...

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Bibliographic Details
Published in:Geomagnetism and Aeronomy 2008-10, Vol.48 (5), p.642-651
Main Authors: Korableva, I. V., Namgaladze, A. A., Namgaladze, A. N.
Format: Article
Language:English
Subjects:
Aeronomy
Earth and Environmental Science
Earth Sciences
Geophysics
Geophysics/Geodesy
Ionosphere
Magnetic fields
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Summary:The height-latitude distributions of the electron density in the European Arctic sector of the subauroral and high-latitude ionosphere have been reconstructed based on the data of satellite radio tomography. The reconstructions have been compared with the results of the numerical modeling obtained using the UAM global numerical model and the IRI-2001 empirical ionospheric model. The goal of the paper was to find the degree of adequacy of these models to the observational data during geomagnetic disturbances. The UAM theoretical model adequately reproduces the dynamics of the main ionospheric trough, in particular, the position of its equatorward wall, and to a certain degree better describes the behavior of the high-latitude ion-osphere than the IRI empirical model. The discrepancies are observed in the regions of increased electron density poleward of the trough. To eliminate such disagreements, it was proposed to correct the model input distributions of precipitating high-energy electron fluxes with an energy of about 0.5 keV; i.e., the inverse problem of determining these distributions has been solved for extremely strong geomagnetic disturbances.
ISSN:0016-7932
1555-645X
0016-7940
DOI:10.1134/S0016793208050095