Physics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1379v&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1379-1400.
Physics
36
Auroral Arcs, Electron Energy, Field Aligned Currents, Incoherent Scatter Radar, Polar Caps, Electrodynamics, Interplanetary Magnetic Fields, Mesoscale Phenomena
Scientific paper
The electrodynamic, thermal, and energetic characteristics of two intense sun-aligned arcs in the polar cap are characterized using Sondre Stromfjord radar measurements obtained on two different nights, February 26 and March 1, 1987. In mesoscale area maps of altitude profiles, repeatable patterns were found for the observed electron and ion gas number densities, temperatures, and line-of-sight velocities. On projected mesoscale maps, repeatable patterns were found for derived electric fields, Pedersen and Hall conductivities, horizontal and field-aligned currents, joule heating rate, and Poynting flux. A self-consistent accurate and comprehensive representation of stable intense sun-aligned arcs is presented, including the electrodynamic, thermal, and energetic character.
Carlson C. Jr. H.
Valladares Cesar E.
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