Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1087o&link_type=abstract
Planetary and Space Science, vol. 27, Aug. 1979, p. 1087-1093. Research supported by the Polska Akademia Nauk.
Physics
Earth Magnetosphere, Geomagnetic Tail, Magnetic Effects, Solar Terrestrial Interactions, Viscous Drag, Magnetopause, Plasma Dynamics, Solar Wind
Scientific paper
Characteristic features of the two solar wind-magnetosphere interaction mechanisms, i.e., the viscous drag and magnetic merging, are discussed. The main difference between them is that the viscous drag acts mainly near the equatorial cross-section of the magnetopause, whereas the magnetic merging acts near the noon-midnight meridian cross-section. Energy input to the tail due to viscous drag action decreases as the magnetic flux in the tail lobes increases, whereas the energy input due to magnetic merging does not depend on the magnetotail flux. A concept is developed that a combined action of these two mechanisms is intimately related to substorm occurrence. Large scale cross-tail electric fields and their relation to energy conversion processes in the tail are analyzed qualitatively and interpreted.
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