Якутск, Россия
Якутск, Россия
Якутск, Россия
We present results of modeling of the electron temperature distribution in the F region of the subauroral ionosphere for different helio-geomagnetic conditions with consideration for magnetospheric heat fluxes. It is shown that under quiet geomagnetic condi-tions during a winter period in the dawn and dusk sec-tors “hot” zones with a higher electron temperature are formed, and under disturbed geomagnetic conditions an annular “hot” region is formed in a time interval 04–06 UT as a result of heat inflow from Earth’s magnetosphere along magnetic field lines. The analysis of the DE-2 satellite data demonstrates that such zones can be formed during geomagnetic disturbances.
subauroral ionosphere, electron temperature, heat flux, three-dimensional model, ring current, F2 region, elevated electron temperature regions, longitudinal features
1. Golikov I.A., Gololobov A. Ju., Popov V.I. Numerical modelling of heat regime of high-latitudinal ionosphere. Bull. of North-Eastern University. 2012, vol. 9, no. 3, pp. 22-28. (In Russian)
2. Gololobov A.Yu., Golikov I.A., Popov V.I. Modelling of high-latitudinal ionosphere with the account of displacement of geographycal and geomagnetic poles. Bull. of North-Eastern University. 2014, vol. 11, no. 2, pp. 46-54. ( In Russian).
3. Heppner J.P. Empirical model of high electric field. J. Geophys. Res. 1977, vol. 82, no. 7, pp. 1115-1125.
4. Klimenko V.V., Koren'kov Ju.N., Namgaladze A.A., Karpov I.V., Surotkin V.A., Naumova N.M. Numerical modelling of “hot spots” in the Earth’s ionosphere Geomagnetism and Aeronomy. 1991, vol. 31, no. 3, pp. 554-557. (In Russian).
5. Kolesnik A.G., Golikov I.A. Mechanism of a formation of main ionospheric trough in the region F Geomagnetism and Aeronomy. 1983, vol. 23, no. 6, pp. 909-914. (In Russian).
6. Koffman W., Wickwar V.B. Very high electron temperature in the daytime F region at Sondrestrom. Geophys. Res. Lett. 1984, vol. 1, no. 9, pp. 912-922. DOI:https://doi.org/10.1029/GL011i009p00919.
7. Mingalev G.I., Mingaleva V.S. Simulation of the spatial structure of the high-latitude F-region for different conditions of solar illumination of the ionosphere. Proc XXV Annual Seminar “Physics of Auroral Phenomena”, Apatity. 2002, pp. 107-110.
8. Schunk R.W., Sojka J.J., Bowline M.D. Theoretical study of the electron temperature in the high-latitude ionosphere for solar maximum and winter conditions. J. Geophys. Res. 1986, vol. 91, no. A11, pp. 12041-12054.
