Physics of Auroral Phenomena

Abstract

Abstract Mathematical modelling has been performed to study positive ionospheric storm dependence on the initial state of the plasmasphere. The self-consistent global model of the Earth's upper atmosphere was used. The calculation was made for the case of the geomagnetic storm of August 15, 1993. The locations of auroral precipitation and fieldaligned current regions were set in agreement with the DMSP satellites data. Energy and intensity of precipitating electron fluxes were taken as functions of geomagnetic activity. A numerical experiment demonstrated that storminduced neutral wind effect in ionospheric F2 region electron density is strongly dependent on the initial plasmasphere state, namely, on the degree of plasmaspheric tube filling