Slot region electron precipitation by lightning, VLF chorus, and plasmaspheric hiss

Details Slot region electron precipitation by lightning, VLF chorus, and plasmaspheric hiss Slot region electron precipitation by lightning, VLF chorus, and plasmaspheric hiss

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8883i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 8883-8894. Research sponsored by the Lockheed Indepe

Physics

35

Electron Precipitation, Hiss, Lightning, Plasmasphere, Very Low Frequencies, Atmospheric Scattering, Bursts, Earth Observations (From Space), Energy Spectra, Radiation Belts

Scientific paper

Based on data obtained with energetic electron spectrometers aboard two low-altitude polar orbiting satellites, a survey of short duration precipitation events shows that the nightside events occurred primarily in the Northern Hemisphere, preferentially between 250 deg E and 320 deg E longitude. The combined diurnal, longitude and L shell variations of the short duration bursts are consistent with the nightside events being predominantly associated with lightning and the dayside events being the result of chorus. Based on pitch angle distribution and energy spectrum measurements, it is suggested that electrons in the drift loss cone represent a significant fraction of those lost from the slot region. Based on comparison of the energy of spectral maxima, it is found that well-defined bursts are not the dominant loss mechanism. An overlap is noted between the distributions in peak energy, and lightning may play a role in precipitating electrons from the slot region, primarily at nighttime, with its greatest contribution at low L shells.

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