F layer positive response to a geomagnetic storm - June 1972

Details F layer positive response to a geomagnetic storm - June 1972 F layer positive response to a geomagnetic storm - June 1972

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6493m&link_type=abstract

Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6493-6500.

Physics

Atmospheric Circulation, Atmospheric Models, F Region, Magnetic Storms, Annual Variations, Atmospheric Composition, Data Processing, Dynamic Response, Ionospheric Disturbances, Ionospheric Electron Density, Neutral Gases, Thermosphere, Time Response, Upper Atmosphere

Scientific paper

A circulation model of neutral thermosphere-ionosphere coupling is used to interpret in situ spacecraft measurements taken during a topside midlatitude ionospheric storm. The data are measurements of electron density taken along the circular polar orbit of Ariel 4 at 550 km during the geomagnetically disturbed period June 17-18, 1972. It is inferred that collisional momentum transfer from the disturbed neutral thermosphere to the ionosphere was the dominant midday process generating the positive F-layer storm phase in the summer hemisphere. In the winter hemisphere the positive storm phase drifted poleward in the apparent response to magnetospheric E x B drifts. A summer F-layer positive phase developed at the sudden commencement and again during the geomagnetic main phase; a winter F-layer positive phase developed only during the geomagnetic main phase. The observed seasonal differences in both the onsets and the magnitudes of the positive phases are attributed to the interhemispheric asymmetry in thermospheric dynamics.

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