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Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 18, 730-739, 2000
© European Geosciences Union 2000
31 Jul 2000
The equatorial F-layer: progress and puzzles
H. Rishbeth Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
Abstract. This work reviews some aspects of the ionospheric F-layer in the vicinity of the geomagnetic equator. Starting with a historical introduction, brief summaries are given of the physics that makes the equatorial ionosphere so interesting, concentrating on the large-scale structure rather than the smaller-scale instability phenomena. Several individual topics are then discussed, including eclipse effects, the asymmetries of the `equatorial trough', variations with longitude, the semiannual variation, the effects of the global thermospheric circulation, and finally the equatorial neutral thermosphere, including `superrotation' and possible topographic influences.

Keyword: Ionosphere (equatorial ionosphere)

Citation: Rishbeth, H.: The equatorial F-layer: progress and puzzles, Ann. Geophys., 18, 730-739, doi:10.1007/s00585-000-0730-6, 2000.
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