Physics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72..164p&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 2-3, p. 164-175.
Physics
2
Ionosphere, Storm, Electron Density, Convection, Thermospheric Composition
Scientific paper
In this paper, we present analyses of the great geomagnetic storms observed during last two cycles of solar activity. This study is based on data from a network of ionosondes located within the longitudinal sector of 80-150°I. it was found that the superstorms were observed predominantly in equinox. Long-lasting severe decreases of ionization at high and middle latitudes were the most impressive storm effect. A short-time positive phase occurred in response to the onset of both ssc and recovery phases of the magnetic storm in the daytime at high and middle latitudes. Large time-varying rates of foF2 were observed at low latitudes. Modeling results of the ionospheric response to two superstorms are also presented. It is established that the storm effect at middle latitudes was controlled predominantly by disturbed thermospheric composition. At high latitudes, the impact of magnetospheric processes and thermospheric composition on the ionosphere was the same.
Pirog O. M.
Polekh Nelya M.
Romanova Elena B.
Shi Jiankui
Wang Xiao
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