Physics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ge%26ae..15.1033p&link_type=abstract
Geomagnetizm i Aeronomiia, vol. 15, Nov.-Dec. 1975, p. 1033-1036. In Russian.
Physics
1
Auroral Electrojets, Ionospheric Currents, Magnetospheric Instability, Plasma Conductivity, Polar Substorms, Ion Acoustic Waves, Magnetic Storms, Plasma Turbulence
Scientific paper
The conditions under which short-circuiting of horizontal currents of ionospheric origin in the magnetospheric plasma can occur in the presence of ion-acoustic turbulence are analyzed. It is assumed that the turbulent plasma has anisotropic conductivity. The longitudinal current is considered to flow through a magnetospheric duct of force lines projected onto the auroral oval. The plasma within the duct is considered to be turbulent. A meridional section of the flow region is described by a Laplace equation, which is solved by a previously reported approximation method (Grinberg, 1970). The maximum longitudinal current for circuit closure in the magnetosphere for the model examined is within the maximum observed values. As a result of their effective short-circuiting in the turbulent magnetospheric plasma, horizontally spaced longitudinal magnetospheric currents cannot serve as electric field sources during substorms.
Pudovkin Mikhail I.
Uvarov V. M.
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