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MODELING OF THE ELECTRON TEMPERATURE ENHANCEMENT IN THE SUBAURORAL IONOSPHERE
Abstract
The results of the electron temperature distribution modelling in the F region of the subauroral ionosphere for different helio-geomagnetic conditions are presented taking into account magnetospheric heat fluxes. The study has been carried out using the threedimensional model of the high-latitude ionosphere in EulerпїЅs variables which taking into account its thermal regime. It is shown that during the period of low solar activity in winter solstice condition the displacement of poles leads to regular longitudinal features in electron temperature distribution due to the diurnal rotation of the Earth around itпїЅs axis. Thus, for the quiet geomagnetic conditions the пїЅhotпїЅ zones with increasing electron temperature are formed in the morning and evening sectors and for the disturbed geomagnetic conditions the ring-shaped пїЅhotпїЅ region is formed during 04 пїЅ 06 UT interval as a result of the heat transfer from the EarthпїЅs magnetosphere along the magnetic field lines. Analysis of data obtained by satellite measurements shows the possibility of forming such zone during geomagnetic disturbances.
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