Ionospheric electrical currents in the late evening plasma flow reversal

Details Ionospheric electrical currents in the late evening plasma flow reversal Ionospheric electrical currents in the late evening plasma flow reversal

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.5339b&link_type=abstract

Journal of Geophysical Research, vol. 84, Sept. 1, 1979, p. 5339-5343.

Computer Science

Sound

1

Atmospheric Electricity, Ionospheric Currents, Magnetohydrodynamic Flow, Night Sky, Reversed Flow, Rocket Sounding, Auroral Arcs, Auroral Electrojets, Current Density, Electric Fields, Electrical Resistivity, Energetic Particles, Field Aligned Currents, Magnetic Fields, Rarefied Plasmas

Scientific paper

An instrumented sounding rocket was launched from Andoya, Norway, in January 1977, in the late evening auroral oval. Its trajectory took it northward over a quiet auroral arc and over a region of plasma flow reversal. Horizontal currents were inferred from magnetic field measurements; they were also calculated from the measured electric field and conductivities derived from energetic particle influxes. South of the reversal region the sheet current density of the eastward electrojet was found to be approximately 0.1 A/m, while north of the reversal the current density was less than 0.05 A/m. The currents were enhanced in the arc. Current continuity considerations in the meridian plane implied downward field-aligned currents at the southern edge of the arc and upward field-aligned currents at the northern edge.

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