Nonlinear electrodynamic regime of the Rayleigh-Taylor instability in the equatorial ionosphere, accounting for ion inertia

Details Nonlinear electrodynamic regime of the Rayleigh-Taylor instability in the equatorial ionosphere, accounting for ion inertia Nonlinear electrodynamic regime of the Rayleigh-Taylor instability in the equatorial ionosphere, accounting for ion inertia

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55...79s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 1, p. 79-87.

Physics

Earth Ionosphere, Electrodynamics, Equatorial Regions, F Region, Geomagnetism, Magnetic Field Configurations, Taylor Instability, Ion Distribution, Ionospheric Ion Density, Magnetohydrodynamics, Perturbation

Scientific paper

The role of nonlinearity, ion inertia and electrodynamic effects in the development of the Rayleigh-Taylor instability (RTI) of the equatorial ionospheric F-region have been investigated. On the basis of magnetic quasi-hydrodynamics a set of nonlinear equations has been obtained. For perturbations of a 10 km size across the geomagnetic field the role of electrodynamic effects is crucial. Nonlinearity impedes the growth of perturbations of enhanced plasma density and intensifies the bubble development. In the latter case the instability becomes explosive. At the final stage of the explosive process ion inertia plays a significant role. The nonlinear oscillatory regime has been investigated. It has been shown that at altitudes of 350 km inertia may significantly bring nearer the time of explosion. At altitudes of 250 km ion inertia exerts practically no influence on perturbation dynamics.

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