Physics
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9112032r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Nov. 1, 1986, p. 12032-12040.
Physics
10
Annual Variations, Electron Precipitation, Magnetic Storms, Radio Waves, Riometers, Data Bases, Extremely Low Radio Frequencies, Ionospheric Electron Density, Plasmapause, Very Low Frequencies
Scientific paper
Riometer measurements of cosmic radio noise absorption obtained in 1975 at Siple Station and at Halley Bay, Antarctica, are the bases of the present examination of electron precipitation variations at L = 4, yielding annual and seasonal averages of 1/2-hourly values for two geomagnetic activity subsets (one disturbed, one quiet). Consistently higher absorption was measured at Halley, on average, during both levels of magnetic disturbance and in all seasons. The local time characteristics of the absorption and wave data can be explained by a model of electron drift and precipitation under quiet and disturbed conditions, as first suggested by Thorne et al. (1974) to account for the local time variation of ELF emission intensity with substorm activity.
Dudeney John R.
Rosenberg T. J.
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