Physics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.7869n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, June 1, 1990, p. 7869-7879.
Physics
16
Electron Energy, Electron Flux Density, Electron Precipitation, Polar Caps, Annual Variations, Diurnal Variations, Satellite Observation, Solar Wind
Scientific paper
The conditions under which events of intense ekV energy polar rain occur were investigated using an automated search of the DMSP F7 polar cap precipitation over a 1100-day interval (December 1983 to May 1987) to find all the days with reasonably intense (greater than 10 to the 6th eV/sq cm) fluxes in one or more greater-than-1-keV electron channels at latitudes greater than 80 deg MLAT. After elimination of precipitation associated with polar cap arcs, 17 such days were found. The results show that an extremely intense energetic polar-rain event is the same phenomenon as ordinary polar rain and that the energetic polar rain can be observed over the course of hours to arise from, and to return to, fairly ordinary polar rain. No particular association with storms or poststorm quieting was evident in this sample.
Meng Ching I.
Newell Patrick T.
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