Effects of anomalous transport on the potentials of discrete auroral arcs

Details Effects of anomalous transport on the potentials of discrete auroral arcs Effects of anomalous transport on the potentials of discrete auroral arcs

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..889s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Sept. 1986, p. 889-892.

Physics

4

Auroral Arcs, Magnetohydrodynamic Stability, Transport Properties, Current Sheets, Magnetohydrodynamic Waves

Scientific paper

The evolution of U-shaped double layers in discrete auroral arcs occurs much faster than the global current in the arc flux tube can be redistributed. For asymptotic stability of the arc on MHD time scales, this implies that local transport mechanisms are required to charge the nearly field-aligned flanks of the equipotential structure over an extended region along the magnetic field. The diversion of the uniform upstream current provides a constraint which limits the double-layer potential.

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