Physics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.4359c&link_type=abstract
Journal of Geophysical Research, vol. 83, Sept. 1, 1978, p. 4359-4364.
Physics
14
Doppler Effect, Equatorial Atmosphere, Ion Density (Concentration), Ionospheric Drift, Magnetohydrodynamic Stability, Spread F, Backscattering, Electrostatic Probes, Plasma Density, Power Spectra, Rayleigh Scattering, Taylor Instability, Very High Frequencies
Scientific paper
A description is presented of a unified model of equatorial spread F which organizes much of the observational data and theoretical results in a self-consistent way. It is suggested that an initial bottomside instability nonlinearly evolves to the point that very steep gradients develop and that these steepened structures are responsible for the power spectra observed by probe experiments. This primary process is very likely the Rayleigh-Taylor instability. Observations indicate that some of the bottomside structures rise into the topside. It is shown that the observed gradients on the edges of these rising bubbles should be unstable to drift waves with a linear growth rate of about 1 per second and a perpendicular wavelength, for maximum growth, near the ion gyroradius.
Costa Edgar
Kelley Michael C.
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