Physics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95..189r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Jan. 1, 1990, p. 189-200. Research supported by NSF.
Physics
33
Atmospheric Turbulence, Daytime, Equatorial Electrojet, Ionospheric Disturbances, Kilometric Waves, Ionospheric Drift, Magnetohydrodynamic Stability, Magnetohydrodynamic Turbulence, Two Fluid Models
Scientific paper
The effect of short-scale turbulence on the kilometer-scale irregularities in the daytime equatorial electrojet is investigated within the framework of a nonlocal two-fluid theory of the gradient drift instability. The presence of the short-scale turbulence is included in the large-scale equations through the average nonlinear flux due to the small-scale nonlinear terms. It is shown that the small-scale turbulence contributes to the large-scale equations through turbulent mobility and diffusion coefficients. The localization of the current layer is seen to shift toward higher altitudes, and the current density profile is found to conform well with available experimental data.
Ronchi Claudio
Similon Philippe L.
Sudan R. N.
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