Physics
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89..855f&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Feb. 1, 1984, p. 855-865.
Physics
46
Convection Currents, Earth Magnetosphere, Ionospheric Currents, Space Plasmas, Atmospheric Ionization, F Region, Incoherent Scatter Radar, Ionospheric Electron Density, Plasma Density
Scientific paper
The average patterns of ionospheric convection observed with the Chatanika incoherent scatter radar, when mapped along magnetic field lines to the equatorial plane, delineate regions of earthward convection within the magnetotail that either proceed sunward to the dayside magnetopause (where reconnection with the IMF can occur) or that join the antisunward circulation along the magnetospheric flanks at dusk and dawn. An examination of summer and winter ionospheric convection patterns in terms of the corresponding magnetospheric circulation patterns shows that ionospheric ionization troughs at dusk and dawn are associated with the sunward convection of low density plasma from the night sector, and that plasma in the vicinity of the dawn and dusk electric field reversals circulates at high latitudes away from the solar ionization source at noon. Plasma exiting from the polar cap is convected away from midnight in the equatorward portion of the regions of sunward convection at auroral latitudes.
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