Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3316106t&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 16, CiteID L16106
Physics
11
Ionosphere: Plasma Waves And Instabilities (2772), Ionosphere: Ionospheric Irregularities, Ionosphere: Ionospheric Disturbances, Ionosphere: Equatorial Ionosphere, Ionosphere: Electric Fields (2712)
Scientific paper
Attempts continue to be made, without notable success, to identify the source of day-to-day variability in occurrence of equatorial spread F (ESF). Most seek to uncover a controlling factor in one of the parameters that describe the linear growth rate of the Rayleigh-Taylor (RT) instability. It is possible, however, that some physics is still missing in that description of ESF generation. Consideration is given here to an F-region response to a large-scale polarization electric field that is generated by a sporadic-E layer instability (Cosgrove and Tsunoda, 2002) and mapped to the bottomside of the F2 layer. Results indicate that the large-scale wave structure, the most reliable precursor for ESF, may be initiated by this process at the base of the F2 layer, where plasma drift is westward.
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