Nonlinear equatorial spread F - Spatially large bubbles resulting from large horizontal scale initial perturbations

Details Nonlinear equatorial spread F - Spatially large bubbles resulting from large horizontal scale initial perturbations Nonlinear equatorial spread F - Spatially large bubbles resulting from large horizontal scale initial perturbations

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.2131z&link_type=abstract

Journal of Geophysical Research, vol. 85, May 1, 1980, p. 2131-2142. Research supported by the U.S. Defense Nuclear Agency and

Physics

25

Atmospheric Models, Bubbles, Equatorial Atmosphere, Ionospheric Disturbances, Night Sky, Spread F, Digital Simulation, Electric Potential, Ion Atom Interactions, Ionospheric Electron Density, Perturbation Theory, Taylor Instability

Scientific paper

The numerical simulations of the nonlinear evolution of the collisional Rayleigh-Taylor instability were performed in the nighttime equatorial ionosphere, using large horizontal scale length initial perturbations. The calculations were performed using a new numerical code which utilized fully multidimensional flux-corrected (FCT) techniques. It was found that large horizontal scale initial perturbations evolve nonlinearly into equally large horizontal scale spread F bubbles, on a time scale as fast as that of the corresponding small horizontal scale length perturbations previously used. The level of plasma depletion inside the large scale bubbles is discussed, showing that its level is due to fringe fields similar in structure to those produced at the edge of a parallel plate capacitor.

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