Simulation of dynamics and structure in the black aurora

Details Simulation of dynamics and structure in the black aurora Simulation of dynamics and structure in the black aurora

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10126995k&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A12, p. 26995-27000

Physics

7

Atmospheric Composition And Structure: Airglow And Aurora, Ionosphere: Electric Fields, Ionosphere: Particle Precipitation, Magnetospheric Physics: Auroral Phenomena

Scientific paper

Simulations of the dynamics and structure associated with the black aurora have been performed. We find that the nonlinear evolution of the stratified Kelvin-Helmholtz shear instability in the presence of a density gradient leads to structured vortices and electric fields in addition to large density depletions. Timescales for vortex generation, roll-up, and breaking are of the order of a second with spatial scales of the order of several hundred meters to several kilometers. Good agreement is found between simulation results and recent experimental observations.

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