A modeling study of the nighttime equatorial E region behavior during magnetospheric substorms and storms

Details A modeling study of the nighttime equatorial E region behavior during magnetospheric substorms and storms A modeling study of the nighttime equatorial E region behavior during magnetospheric substorms and storms

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1062k&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A5, pp. SMP 8-1, CiteID 1062, DOI 10.1029/2001JA900155

Physics

Space Physics

Ionosphere: Electric Fields (2712), Ionosphere: Equatorial Ionosphere, Ionosphere: Ionosphere/Magnetosphere Interactions (2736)

Scientific paper

The results of a modeling study of the variations of altitude ion density distribution in the nighttime E region over the magnetic equator during strong magnetospheric substorms and storms due to perturbations of the zonal electric field Ey are presented. The ion density N is calculated by solving the time-dependent continuity equation for ion density by assuming the time variations of Ey, which are fitted to some of the observed ones. It is shown that during severe magnetospheric disturbances, the altitude structure of the nighttime equatorial E region is substantially modified, with the largest effects in the lower part of E region (z < 105 km), where a deep trough in ion density is formed instead of the quiet E region maximum. The ion density in the trough can be ~1/6 times the undisturbed value of N. The E region maximum NmE can be lifted up by ~30 km, being ~2× decreased as compared with the quiet time value of NmE. In the course of the magnetospheric disturbance the E region is bifurcated into two layers.

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