Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87..777k&link_type=abstract
Journal of Geophysical Research, vol. 87, Feb. 1, 1982, p. 777-783.
Physics
10
Atmospheric Models, Electric Current, Electric Fields, Ionospheric Conductivity, Polar Substorms, Birkeland Currents, Boundary Value Problems, Computerized Simulation, Convective Flow, Current Density, Earth Magnetosphere, Electrojets, Field Aligned Currents, Ohmic Dissipation, Resistance Heating, Satellite Observation, Time Dependence
Scientific paper
The currents and electric fields in the area covered by the poleward set of field-aligned currents are computed by means of a quantitative model, in which the high-latitude band considered carries most of the poleward electrojet, and lies poleward of the region covering the inner magnetosphere and corresponding ionosphere. The Birkeland current and aurorally enhanced conductivity are assumed to be uniformly distributed across the band. The time-dependent conductivity model used is based on electron fluxes and mean energies measured from the S3-2 satellite. Joule heating of the upper atmosphere was found to be about 2 x 10 to the 11th W during the substorm period. Model values for the strength of the electrojet and the amount of Joule heating agree to within about 20% with results based on a simple Cowling conductivity band.
Chen Chun-Ku
Harel Matan
Karty J. L.
Spiro Robert W.
Wolf Richard A.
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