Nonlinear evolution of diffuse auroral F region ionospheric irregularities

Details Nonlinear evolution of diffuse auroral F region ionospheric irregularities Nonlinear evolution of diffuse auroral F region ionospheric irregularities

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..573k&link_type=abstract

Geophysical Research Letters, vol. 7, Aug. 1980, p. 573-576. Research supported by the U.S. Defense Nuclear Agency and U.S. Nav

Physics

3

Auroral Zones, F Region, Ionospheric Disturbances, Nonlinearity, Computerized Simulation, Convective Flow, Night, Nonuniform Plasmas, Particle Precipitation, Polar Regions, Power Spectra

Scientific paper

Numerical simulations of the nonlinear evolution of the current convective instability in the diffuse aurora have been performed for conditions typical of the nighttime high latitude F region. The results show nearly field aligned plasma irregularities developing in regions of well-defined northward gradients of total electron content (TEC) and field-aligned diffuse auroral particle precipitation. In addition, equatorward movement of plasma enhancements and northward (poleward) movement of plasma depletions (holes) are found. Furthermore, one-dimensional spatial power spectra of the irregularities in both the north-south and east-west directions are all described by inverse power laws.

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