Physics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41...35r&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 1, p. 35-43.
Physics
77
Magnetosphere-Ionosphere Coupling, Plasma Density, Plasmapause, Plasmasphere, Two Dimensional Models, Hydrogen Ions, Magnetospheric Instability, Magnetospheric Ion Density, Plasma Oscillations, Solar Terrestrial Interactions
Scientific paper
A 2D model of the plasmasphere has been developed to study the temporal evolution of plasma density in the equatorial plane of the magnetosphere. This model includes the supply and loss of hydrogen ions due to ionosphere-magnetosphere coupling as well as the effects of E x B convection. A parametric model describing the required coupling fluxes has been developed which utilizes empirical models of the neutral atmosphere, the ionosphere and the saturated plasmasphere. The plasmaspheric model has been used to examine the time it takes for the plasmasphere to refill after it has been depleted by a magnetic storm. The time it takes for the plasmasphere to reach 90 percent of its equilibrium level ranges from 3 days at L = 3 during solar minimum to as high as 100 days at L = 5 during solar maximum. Refilling is also dependent on the month of the year, with refilling requiring a longer period of time at solar maximum during June than during December for L greater than 3.2.
Guiter Steven M.
Rasmussen Craig E.
Thomas Steven G.
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