Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa33a1131o&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA33A-1131
Physics
2415 Equatorial Ionosphere, 2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities, 2471 Plasma Waves And Instabilities
Scientific paper
Recently much interest has been focussed on the onset and evolution of equatorial F-region ionospheric irregularities both for quiet and stormtime periods. The overall growth rate of the Rayleigh-Taylor instability in the equatorial ionosphere is dependent on several factors, e.g., vertical density gradient, E-region conductivity, parallel conductivity, and thermospheric winds. We have developed a three-dimensional nonlinear simulation code to treat the evolution of the Rayleigh-Taylor instability in equatorial spread-F. The code contains ion inertial effects to properly treat the high altitude evolution of spread-F plumes. In this paper we use this code to study the effects of combined time-dependent vertical and zonal drifts on the 3D evolution of the Rayleigh-Taylor instability. We compare the code predictions with ground-based observations.
Fejer Bela
Keskinen Michael J.
Ossakow S. L.
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