The behaviour of H(+) and He(+) ions in the topside ionosphere during a short-lived subauroral ion drift

Details The behaviour of H(+) and He(+) ions in the topside ionosphere during a short-lived subauroral ion drift The behaviour of H(+) and He(+) ions in the topside ionosphere during a short-lived subauroral ion drift

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1209m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, Aug. 1991, p. 1209-1216.

Computer Science

6

Helium Ions, Hydrogen Ions, Ionospheric Ion Density, Plasma Drift, Plasmasphere, Atmospheric Models, Earth Magnetosphere, F Region, Oxygen Ions

Scientific paper

A model of the ionosphere and plasmasphere is used to investigate the effects of an imposed westward plasma drift on H(+) and He(+) behavior in the nightside topside ionosphere. A closed subauroral tube of plasma is considered and the velocity spike, of maximum value 2 km/s, persists for 10 min. The upward surge of O(+) flow (caused by frictional heating of the ions in the F-region) gives rise to rapid upward H(+) and He(+) flows. The H(+) and He(+) velocities in the topside are comparable to those of O(+) but the transient H(+) and He(+) fluxes are not significant contributors to the magnetospheric light ion population. Above 500-km altitude the ionospheric H(+) and He(+) densities decrease during the westward plasma drift.

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