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Vol. 7 (2004 year), No. 1

Volkov M.A., Romanova N.Yu.
The simulation of the magnetosphere-ionosphere convection using the open magnetospheric model

The simulation of the magnetosphere-ionosphere convection has been produced using the open magnetospheric model with the ellipsoidal form of the magnetopause for the homogeneous interplanetary magnetic field (IMF), penetrating into the Earth magnetosphere. The open magnetospheric model Tsyganenko 96 has been used. The modelling calculations have been compared with the ionospheric ion drift data. The calculations correctly reproduce a "throat" in the convection pattern in the dayside ionosphere, the convection direction depending from the sign of the IMF component B_y in the polar cap and convection near midnight. However, the modelling calculations predict the location of the convective focuses in more late hours for B_y<0 then the experimental data and in more early hours for B_y>0. The conclusion has been made that it is impossible to explain these features of the convection by the magnetospheric model Tsyganenko 96.

(in Russian, стр.3, fig. 1, tables. 0, ref 5, MS Word 95, MS Word 95 344 Kb)

Vol. 16 (2013 year), No. 1

Volkov M.A., Romanova N.Yu.
The appearance of the electric currents during dipolarization of the Earth magnetic field lines

The appearance of the currents in the ionosphere and magnetosphere of the Earth during the expansive phase of the substorm have been studied in this work. It has been shown that the formation of the field-aligned currents and westward Cowling currents in the ionosphere can be generated by dipolarization of the magnetic field lines. The model distribution of the plasma pressure balanced with the magnetic field during the growth phase of the substorm has been taken. The conditions of formation of the currents wedge have been obtained. In the work the density of the field-aligned currents in the midnight sector of the auroral ionosphere has been estimated within the adiabatic approach.

(in Russian, стр.4, fig. 3, tables. 0, ref 13, Adobe PDF, Adobe PDF 0 Kb)