Three-dimensional equatorial spread F modeling

Details Three-dimensional equatorial spread F modeling Three-dimensional equatorial spread F modeling

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3510102h&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 10, CiteID L10102

Physics

34

Ionosphere: Ionospheric Irregularities, Ionosphere: Ionospheric Disturbances, Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Dynamics

Scientific paper

The Naval Research Laboratory (NRL) has developed a new three-dimensional code to study equatorial spread F (ESF). The code is based on the comprehensive NRL 3D ionosphere model SAMI3 and includes a potential equation to self-consistently solve for the electric field. The model assumes equipotential field lines so a 2D electrodynamic problem is considered. In this study a narrow wedge of the post-sunset ionosphere is simulated. It is found that (1) bubbles can rise to ~1600 km, (2) extremely steep ion density gradients can develop in both longitude and latitude, (3) upward plasma velocities approach 1 km/s, and (4) the growth time of the instability is $\simeq$15 min. These results are shown to be consistent with radar and satellite observations.

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