Reconstruction of large-scale structure of the high-latitude ionosphere at changing UV radiation from the Sun and the Earth thermosphere

Numerical experiments into investigation of reconstruction of full-scale structure of high-latitude ionosphere at simultaneous variation of the Sun UV radiation and the Earth thermosphere are conducted using three-dimensional nonstationary model of ionosphere. It is shown, that disturbance of steady-state is accompanied by more prolonged time of setting which is linked with predominant process of plasma convection under the effect of magnitospherical origin electric field in high-latitude ionosphere in contrast to medium-latitude. It results in the fact, that high-latitude ionosphere occurs in nonstationary state practically always