Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.5184v&link_type=abstract
Journal of Geophysical Research, vol. 87, July 1, 1982, p. 5184-5196.
Physics
89
Auroral Zones, Energy Transfer, Ionospheric Heating, Ohmic Dissipation, Particle Precipitation, Resistance Heating, Auroral Electrojets, Incoherent Scattering, Night Sky, Radar Scattering, Temporal Distribution
Scientific paper
The characteristic morphology of auroral zone energy deposition by Joule heating and precipitating particles is investigated, through the analysis of eight days of incoherent scatter radar synoptic data covering invariant latitudes between about 62 and 68 deg. The composite spatial morphology derived from the data shows a faster rate of thermospheric energy deposition by morning sector particle precipitation than by that in the evening sector, while the Joule heating rate has the opposite asymmetry about midnight. This complementary asymmetry is consistent with the ionospheric conductivity changes implied by the local time variation of precipitating particle hardness. While the Joule heating rate generally dominates particle energy deposition in the premidnight sector, the daily averages of the two energy sources are approximately equal.
Matthews S. J.
Vickrey James F.
Vondrak Richard R.
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