Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ssrv...57...59l&link_type=abstract
Space Science Reviews (ISSN 0038-6308), vol. 57, July 1991, p. 59-108.
Physics
31
Earth Magnetosphere, Solar Terrestrial Interactions, Solar Wind, Unsteady State, Geomagnetism, Interplanetary Magnetic Fields, Lines Of Force, Magnetic Field Configurations, Magnetohydrodynamic Flow
Scientific paper
The nonstationary interaction of the solar wind with the earth's magnetosphere is examined in terms of the impulsive penetration theory. The plasma-field irregularities, i.e., plasmoids, detected in the solar wind can penetrate inside the geomagnetic field beyond the mean position of the magnetopause. Gusty penetration of these plasmoids depends on their excess momentum density and on the orientation of the IMF. The motion of plasmoids across nonuniform magnetic field configurations is described with an emphasis on the value of the integrated Pederson conductivity, a determining factor in cross-B plasma motion. Consequences of the penetration mechanism are also considered, including the escape of energetic particles out of the magnetosphere, the eastward deflection of penetrating plasmoids, the magnetospheric and ionospheric convection patterns, the erosion of plasmoids, and the mass/momentum loading effects.
Lemaire Joseph
Roth Marcel
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