Physics
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.2517b&link_type=abstract
Journal of Geophysical Research, vol. 83, June 1, 1978, p. 2517-2524. Research supported by the Norges Almenvitenskapelige Fors
Physics
12
Auroral Zones, Energy Dissipation, High Resolution, Ionospheric Currents, Vertical Distribution, Convective Heat Transfer, Current Density, Electric Fields, F Region, Geomagnetism, Gravity Waves, Momentum Transfer, Ohmic Dissipation, Universal Time
Scientific paper
Chatanika, Alaska incoherent scatter radar data were used to calculate height-resolved altitude profiles of the Joule heating rate. The measured Joule heating rate typically maximizes at an altitude well above the altitude of the current density maximum and, for a reasonable model neutral atmosphere, the maximum Joule heating rate occurs above the altitude of the corresponding Pedersen conductivity maximum. The westward electrojet is 10 km lower than the eastward auroral electrojet centered at 130 km, and the effects of this height difference are discussed. The total Joule dissipation in the neutral atmosphere was calibrated with respect to the magnetic field disturbance vector, and the heating efficiency was found to be 10 times larger in a positive bay than in a negative bay.
Brekke Asgeir
Rino C. L.
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