Observations relating changes in thermospheric composition to depletions in topside ionization during the geomagnetic storm of September 1982

Details Observations relating changes in thermospheric composition to depletions in topside ionization during the geomagnetic storm of September 1982 Observations relating changes in thermospheric composition to depletions in topside ionization during the geomagnetic storm of September 1982

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.2389m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, April 1, 1984, p. 2389-2394.

Physics

11

Atmospheric Composition, Ionospheric Electron Density, Ionospheric Storms, Magnetic Storms, Midlatitude Atmosphere, Thermosphere, Dynamics Explorer 2 Satellite, F 2 Region, Ionospheric Heating, Nitrogen Ions, Oxygen Ions, Plasma Dynamics, Wind Effects

Scientific paper

In situ measurements taken over midlatitudes by the Dynamics Explorer 2 spacecraft during a geomagnetic substorm show that a direct correlation exists between depletions in the O/N2 density ratio and in the topside electron density, Ne. On the basis of this correlation, it is concluded that, for the storm of September 1982, losses of free electrons via oxygen and nitrogen chemistry near the F2 peak dominate over wind-induced plasma transport in determining the observed stormtime variations of topside Ne at higher latitudes. However, the appearance of an enhancement in topside Ne along 20-deg invariant latitude indicates that an equatorial wind did develop and was effective in increasing gas temperatures and in generating topside Ne enhancement at lower latitudes.

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