First three-dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere

Details First three-dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere First three-dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3503101y&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 3, CiteID L03101

Physics

6

Ionosphere: Ionospheric Irregularities, Ionosphere: Plasma Waves And Instabilities (2772), Ionosphere: Midlatitude Ionosphere, Ionosphere: Modeling And Forecasting

Scientific paper

A three-dimensional numerical simulation in the nighttime midlatitude ionosphere is developed for the first time and applied to the Perkins instability in the midlatitude F region. Growth of the Perkins instability is successfully reproduced under nighttime condition, and the numerical results basically agree with a linear theory and previous two-dimensional numerical studies. Northwest-southeast (NW-SE) alignment of density perturbations is generated from random seeding by applying a southeastward neutral wind. The perturbations are dominant at altitudes of 200-300 km where a steep density gradient exists, which is consistent with the altitude of 630-nm airglow emission that often shows NW-SE alignment. Further simulation in terms of the E-F coupling can be done in the near future.

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