Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7989k&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 7989-7996.
Physics
48
Auroral Electrojets, Electric Fields, Ionospheric Conductivity, Electric Field Strength, Hall Effect, Magnetometers, Radar Measurement
Scientific paper
Synoptic Chatanika radar observations of the latitudinal structure of the auroral electrojets in a wide local time range are presented in order to assess the relative importance of the electric fields and conductances at different auroral latitude locations. Eight sets of data from continuous observations of more than 12 hours in duration were selected and have been utilized to examine the latitude and local time variations of auroral energy deposition by precipitating particlles and Joule heating. It is found that for moderate and large current densities the northward electrical field strength increases as the magnitude of the eastward electrojet in the evening sector increases. The height-integtated Hall conductivity stays generally at the level of 10 mbos even when the current density becomes as large as 1 A/m. However, when the eastward electrojet is small, substantial electric fields of 10-20 mV/m may still exist as if the magnetosphere has a persistent voltage source.
Kamide Yohsuke
Vickrey James F.
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