Physics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88..211b&link_type=abstract
Journal of Geophysical Research, vol. 88, Jan. 1, 1983, p. 211-223.
Physics
39
Convection, Earth Magnetosphere, Electrojets, Interplanetary Magnetic Fields, Ionospheric Drift, Magnetic Storms, Auroral Zones, Diurnal Variations, Electric Fields, Harmonic Functions, Incoherent Scattering
Scientific paper
The behavior of midlatitude E X B drifts during magnetospheric events is analyzed for both storm and substorm cases on the basis of Saint-Santin incoherent scatter data covering the 1973-76 period. The disturbance E X B drift is studied in terms of its relation to global parameters known to control or to result from magnetospheric convection. From substorm cases it is shown that the interplanetary magnetic field plays a major role in the control of midlatitude drift variations and that these drifts respond in real time to those substorms associated with southward excursions of the B(Z) component and with large values of the ring current inflation rate. In several cases, the midlatitude disturbance drifts were associated with an activation of the eastward electrojet in the evening and afternoon sectors over the standard auroral zone magnetic observatories. Finally, the average disturbance E X B drift pattern was calculated and given a diurnal harmonic representation for equinox conditions.
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