Physics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.5512s&link_type=abstract
Journal of Geophysical Research, vol. 82, Dec. 1, 1977, p. 5512-5520.
Physics
29
Atmospheric Circulation, Convective Flow, Geomagnetism, High Temperature Plasmas, Magnetospheric Instability, Collisionless Plasmas, Differential Equations, Ionospheric Conductivity, Ohmic Dissipation, Plasma Density, Plasma Pressure, Pressure Gradients
Scientific paper
The fluid characteristics of the effects hot plasma creates in hydromagnetic flow in the magnetosphere are discussed. It is suggested that the hot plasma pressure, number density, and ionospheric conductivity are the primary factors governing these effects. It is shown that changes in convection generate east-west pressure gradients near the ring current inner edge. These gradients cause the east-west flows which produce the shielding effect. In these flows, which are quickly set up on the nightside, Joule dissipation in the ionosphere causes the loss of plasma compressional energy. Although on the dayside the process is slower, it is felt that dayside conductivity controls final ring current penetration. The effects of collisionless plasma behavior on this limit, and the development of steady state flow are described.
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