Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jatp...45..811w&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 45, Dec. 1983, p. 811-822.
Physics
7
Atmospheric Attenuation, Electron Precipitation, Ionospheric Disturbances, Midlatitude Atmosphere, Atmospheric Ionization, High Energy Electrons, Ionospheric Propagation, Magnetospheric Instability, Night Sky
Scientific paper
The main features of the night-time ionospheric post-storm absorption increases (PSE) have been compiled and explained by enhanced ionization due to fluxes of precipitating high-energy electrons in a belt with a poleward boundary, moving towards higher latitudes with increasing storm-time. Assuming that during the recovery phase the same source (radial diffusion) and loss (pitch-angle diffusion by resonant interaction with plasmaspheric hiss) processes dominate as during quiet conditions, it was possible to deduce a qualitative model describing the main features of the space-time-variations of the precipitation belt. The discussion of the main properties of the enhanced precipitation in the belt, as well as an investigation of satellite and groundbased data for a special storm (June 1972), lead to two main conclusions (1) the poleward boundary of the precipitation belt is closely correlated with the plasmapause position and reflects its motion; (2) the flux of precipitating high-energy electrons is not only determined by the loss process, but by the source as well - the variation of the fluxes of precipitating electrons as a function of time mainly reflect the variations of the source.
Ranta Hilkka
Wagner Ch. U.
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