Three-dimensional nonlinear evolution of equatorial ionospheric spread-F bubbles

Details Three-dimensional nonlinear evolution of equatorial ionospheric spread-F bubbles Three-dimensional nonlinear evolution of equatorial ionospheric spread-F bubbles

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30pssc4k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 16, pp. SSC 4-1, CiteID 1855, DOI 10.1029/2003GL017418

Physics

22

Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Irregularities, Ionosphere: Modeling And Forecasting, Ionosphere: Plasma Waves And Instabilities

Scientific paper

Using numerical simulation techniques, we present the first study of the three-dimensional nonlinear evolution of an equatorial spread-F bubble. The background ionosphere used to initialize the bubble evolution is computed using a time-dependent first-principles equatorial plasma fountain model together with a prereversal enhancement vertical drift model. We find that finite parallel conductivity effects slow down both the linear and nonlinear bubble evolution compared to the two-dimensional evolution. In addition we find that bubble-like structures with extremely sharp density gradients can be generated off the equator at equatorial anomaly latitudes in agreement with recent observations.

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