Evidence for the equatorward penetration of electric fields, winds, and compositional effects in the Asian/Pacific sector during the September 17-24, 1984 ETS interval

Details Evidence for the equatorward penetration of electric fields, winds, and compositional effects in the Asian/Pacific sector during the September 17-24, 1984 ETS interval Evidence for the equatorward penetration of electric fields, winds, and compositional effects in the Asian/Pacific sector during the September 17-24, 1984 ETS interval

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9416999f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 16999-17007.

Physics

37

Electric Fields, Equinoxes, Ionospheric Composition, Ionospheric Storms, Wind Profiles, Asia, Diurnal Variations, F Region, Ionosondes, Ionospheric Heating, Legendre Functions, Spatial Distribution

Scientific paper

A latitudinal chain of ionosondes is utilized to provide a depiction of wind, electric field, and compositional effects on the ionospheric F region during the September 1984 Equinox Transition Study (ETS) interval that is nearly continuous in latitude and time, and thus ideal for comparison with numerical models of the ionosphere-thermosphere system. Besides delineating the intensity, latitudinal penetration, and magnetic activity dependence of anticipated nighttime elevations of the F layer, peak height and daytime depressions of F layer plasma densities are delineated. Two enhancements in the low-latitude plasma densities occur after storm onset, consistent with a pumping up and/or poleward extension of the equatorial anomaly. A diurnal mean disturbance meridional circulation is inferred which is in general agreement with predictions by numerical models of the zonal mean circulation.

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