Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11110306p&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue A10, CiteID A10306
Physics
4
Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Magnetospheric Physics: Numerical Modeling, Ionosphere: Ionospheric Disturbances, Ionosphere: Electric Fields (2712), Ionosphere: Ionization Processes (7823)
Scientific paper
We report on a modeling study on the effects of subauroral polarization stream (SAPS) events equatorward of the plasmapause footprints, using the Sheffield Coupled Thermosphere-Ionosphere-Plasmasphere (CTIP) model. SAPS events are simulated by imposing a poleward electric field for 2 hours in the premidnight sector between 50° and 60° magnetic latitude. The presence of the SAPS results in a decrease in vertical total electron count and F region ion density, while the height of the F region can rise by up to 100 km. A study of the relative importance of the physical processes finds that the most significant contribution is the temperature increase due to ion-neutral friction, resulting in increased reaction rates of O+ loss. The recovery time for the SAPS studied is up to 10 hours.
Bailey Graham J.
Balthazor R.
Pinter Balázs
Thom S. D.
Vo Hien
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