Field-aligned plasma flow in the quiet, mid-latitude ionosphere deduced from topside soundings

Details Field-aligned plasma flow in the quiet, mid-latitude ionosphere deduced from topside soundings Field-aligned plasma flow in the quiet, mid-latitude ionosphere deduced from topside soundings

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jatp...45....1l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 45, Jan. 1983, p. 1-14.

Computer Science

Sound

10

Atmospheric Models, Field Aligned Currents, Ionospheric Sounding, Magnetohydrodynamic Flow, Oxygen Ions, Space Plasmas, Diurnal Variations, Incoherent Scatter Radar, Magnetic Storms, Plasma Temperature, Satellite Sounding, Thermosphere

Scientific paper

A technique for using satellite spectrometer data for quantifying the diffusive oxygen ion flow in the topside ionosphere is presented. The MSIS model (Hedin et al., 1977) is employed to predict the absolute magnitudes of the field-aligned flux of the ions relative to the neutral oxygen atom gas. The calculations are based in part on the alteration in the shape of the plasma scale-height profile near the F2-peak because of the large ion-neutral drag in that area. The calculated errors for the predictions are 10% for the upward flow values, while downward flux predictions are accurate to within 20%. A total of 1098 mean scale-height profiles has been derived from over 60,000 topside sounding during quiet times. The oxygen ion flow in the quiet topside was found to display diurnal variations, and a comparison was made of the flow in summer and winter. A decrease in the upward flows was observed during the winter daytime ionosphere during the 6th and 12th days following storm activity.

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