Physics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15..756s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 15, Aug. 1988, p. 756-759.
Physics
34
Magnetohydrodynamic Stability, Magnetohydrodynamic Waves, Shear Flow, Space Plasmas, Tearing Modes (Plasmas), Wave Propagation, Collisionless Plasmas, Ionospheric Disturbances
Scientific paper
The three-dimensional nonlinear simulation of the evolution of a kinetic Alfven wave is presented for simple boundary conditions that resemble those of a discrete auroral breakup arc. The model used is a variant of the reduced megnetohydrodynamic description that includes, in addition, the important dispersive effect of electron inertia. It is found that with a 'generator' boundary condition corresponding to a current generator and a fully conducting 'load' boundary, the wave evolves three-dimensionally through a combination of shear flow and collisionless tearing mode instability.
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