Plasma motion in the plasmasphere and the magnetospheric mechanism of Sq variations

Details Plasma motion in the plasmasphere and the magnetospheric mechanism of Sq variations Plasma motion in the plasmasphere and the magnetospheric mechanism of Sq variations

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ge%26ae..33..140s&link_type=abstract

Geomagnetizm i Aeronomiya (ISSN 0016-7940), vol. 33, no. 2, p. 140-145.

Computer Science

Angular Velocity, Ionospheric Currents, Magnetospheric Instability, Plasma Dynamics, Plasmasphere, Plasma Drift, Plasmapause, Whistlers

Scientific paper

The paper presents calculations of plasma flow inside the plasmapause corresponding to the distribution of external pressure at the plasmapause in the presence of uniform magnetospheric-plasma flow, assuming that the corotation rate inside the plasmasphere is high and that the plasmapause is approximated by a circle. It is shown that the velocity component inside the plasmasphere, differing from corotation, reduces to the semidiurnal harmonic, which, together with the diurnal dependence of the ionospheric conductivity, leads to the appearance of the diurnal current harmonic in the ionosphere, corresponding to the Sq-variation current in terms of the position of cells and the total current in them, but having a 180-deg difference in phase.

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