Feedback between neutral winds and auroral arc electrodynamics

Details Feedback between neutral winds and auroral arc electrodynamics Feedback between neutral winds and auroral arc electrodynamics

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9113506l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Dec. 1, 1986, p. 13506-13512. Research supported by the Aerospace Cor

Physics

15

Atmospheric Circulation, Auroral Arcs, Electrodynamics, Ionospheric Currents, Neutral Gases, Acceleration (Physics), Drag, Field Aligned Currents, Wind Velocity

Scientific paper

The feedback between neutral atmospheric winds and the electrodynamics of a stable, discrete auroral arc is analyzed. The ionospheric current continuity equation and the equation for neutral gas acceleration by ion drag are solved simultaneously, as a function of time. The results show that, in general, the electric field in the ionosphere adjusts to neutral wind acceleration so as to keep auroral field-aligned currents and electron acceleration approximately independent of time. It is thus concluded that the neutral winds that develop as a result of the electrodynamical forcing associated with an arc do not significantly affect the intensity of the arc.

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