A magnetospheric signature of some F layer positive storms

Details A magnetospheric signature of some F layer positive storms A magnetospheric signature of some F layer positive storms

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.3646m&link_type=abstract

Journal of Geophysical Research, vol. 86, May 1, 1981, p. 3646-3652.

Physics

4

Atmospheric Heating, Atmospheric Models, Earth Magnetosphere, F Region, Ionospheric Electron Density, Ionospheric Storms, Charge Exchange, Geomagnetism, Magnetic Field Configurations, Midlatitude Atmosphere, Momentum Transfer, Particle Interactions, Plasmapause, Plasmasphere, Thermosphere

Scientific paper

Calculations of electron density distributions in the global thermosphere-ionosphere system perturbed by high-latitude thermospheric heating are presented which indicate a link between the heating and magnetospheric plasma disturbances near the equator. The calculations were made using a self-consistent model of the global sunlit thermosphere-ionosphere system describing the evolution of equatorial plasma disturbances. The heat input is found to cause electron density enhancements that propagate along magnetic field lines from the F2 maximum over mid-latitudes to the equator in the magnetosphere and which correspond to the positive phase of an F layer storm. The positive phase is shown to be generated by the induction of equatorward winds that raise the mid-latitude F layer through momentum transfer from neutral atoms to ionospheric ions, which ions pull electrons with them. Model results are used to identify plasma signatures of equatorward winds and an intensified magnetospheric electric field in Explorer 45 and Arial 4 measurements taken during the positive phase of an F layer storm.

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