Physics
Scientific paper
Nov 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38.1041l&link_type=abstract
(International Union of Radio Science and International Association of Geomagnetism and Aeronomy, Symposium on the Physics of th
Physics
2
Atmospheric Models, Geoelectricity, Geomagnetism, Magnetospheric Instability, Plasmapause, Roche Limit, Magnetic Field Configurations, Steady State, Thermal Plasmas, Whistlers
Scientific paper
It has recently been suggested that the plasmasphere of earth is peeled off near midnight by 'plasma elements interchange motion' driven by centrifugal or inertial forces. McIlwain's (1974) convection electric field model with a variable scale factor (f) has been used to calculate different plasmapause positions and shapes. The theoretical models obtained with f of about 1.2 are in agreement with observations of whistlers and by the Prognoz satellites for periods of very low geomagnetic activity (i.e., Kp less than 1). Numerical models corresponding to f of about 0.7 fit qualitatively the observations of the plasmasphere and plasmapause when the geomagnetic activity has a higher constant level (i.e., Kp between 2 and 4). A tentative relation between f and Kp is deduced.
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