Physics – Space Physics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ijrsp...6..223j&link_type=abstract
(Space Sciences Symposium, Trivandrum, India, Jan. 18-21, 1977.) Indian Journal of Radio and Space Physics, vol. 6, Sept. 1977,
Physics
Space Physics
Ionospheric Ion Density, Magnetohydrodynamic Stability, Spread F, Taylor Instability, Tropical Meteorology, Equations Of Motion, Ionospheric Drift, Larmor Precession, Nonlinear Equations, Phase Velocity, Rayleigh Distribution, Wave Equations
Scientific paper
The non-linear evolution of the collisional, gravitation-induced Rayleigh-Taylor (R-T) instability in the equatorial F-region has been studied, taking into account the finite Larmor radius effects and the complete ion inertial term in ion equation of motion. A special class of coherent weakly non-linear modes as solutions to the wave equation describing R-T instability driven modes, is obtained. It is shown that the R-T modes in the equatorial F-region can evolve into coherent, non-linear, almost sinusoidal, stationary wave structures. These structures are found to travel with a constant phase velocity and to have distorted sinusoidal shapes. The present results show a reasonably good agreement with many of the recent rocket and satellite observations of the equatorial spread-F irregularities.
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