Storm time plasma transport at middle and high latitudes

Details Storm time plasma transport at middle and high latitudes Storm time plasma transport at middle and high latitudes

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.1675f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A2, p. 1675-1689.

Physics

105

Incoherent Scatter Radar, Ionospheric Ion Density, Plasma Density, Storms, F Region, Polar Caps

Scientific paper

The Millstone Hill incoherent scatter radar regularly observes storm-enhanced plasma density (SED) as a spatially continuous, large-scale feature spanning local times between noon and midnight at latitudes between the polar cap and its mid- or low-latitude source region. For local times away from noon, the latitude of most probable SED occurrence moves equatorward by 6 deg for an increase of 2 in the Kp index. During strong disturbances the topside SED is observed to be convecting sunward at about 750 m/s with a flux of 10 exp 14/sq m s. This feature accounts for the pronounced enhancement of ionospheric density near dusk at midlatitudes observed during the early stages of magnetic storms and constitutes a source of the enhanced F region plasma observed in the polar cap during disturbed conditions.

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