Modeling polar cap F-region patches using time varying convection

Details Modeling polar cap F-region patches using time varying convection Modeling polar cap F-region patches using time varying convection

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1783s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 17, p. 1783-1786.

Physics

60

Convection Currents, F Region, Interplanetary Magnetic Fields, Polar Caps, Space Plasmas, Atmospheric Models, Plasma Drift

Scientific paper

Creation of polar cap F-region patches are simulated for the first time using two independent physical models of the high latitude ionosphere. The patch formation is achieved by temporally varying the magnetospheric electric field (ionospheric convection) input to the models. The imposed convection variations are comparable to changes in the convection that result from changes in the B(y) IMF component for southward IMF. Solar maximum-winter simulations show that simple changes in the convection pattern lead to significant changes in the polar cap plasma structuring. Specifically, in winter, as enhanced dayside plasma convects into the polar cap to form the classic tongue-of-ionization the convection changes produce density structures that are indistinguishable from the observed patches.

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