Current convective instability in the diffuse aurora

Details Current convective instability in the diffuse aurora Current convective instability in the diffuse aurora

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..332o&link_type=abstract

Geophysical Research Letters, vol. 6, Apr. 1979, p. 332-334. Research supported by the U.S. Defense Nuclear Agency and U.S. Nav

Physics

19

Auroral Zones, Convection Currents, F Region, Ionospheric Electron Density, Magnetospheric Instability, Electric Fields, Gyrofrequency, Ionospheric Drift, Magnetic Fields, Wideband Communication

Scientific paper

It is noted that a stable E x B gradient drift geometry can become destabilized by a current along the magnetic field. Such a stability is generically called the current convective instability. Consideration is given to the possibility that this instability may be responsible for the diffuse auroral scintillation causing F region irregularities observed by the DNA Wideband satellite. In these phenomena the northwest TEC gradient dominates the altitude electron density gradient. A simple plasma fluid model is investigated and a condition for instability is found.

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