Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612102k&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 12, CiteID L12102
Physics
6
Ionosphere: Equatorial Ionosphere, Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Ionospheric Disturbances, Ionosphere: Ionospheric Irregularities, Ionosphere: Modeling And Forecasting
Scientific paper
The three-dimensional nonlinear evolution of equatorial ionospheric bubbles, using a realistic lower atmospheric gravity wave source, has been computed. It is found that three-dimensional finite parallel conductivity effects are important and lead to reduced gravity wave-induced electric fields, less depleted bubbles, and longer time scale bubble evolution compared to the two-dimensional case. It is concluded that nearly zonal propagating gravity waves are needed to excite equatorial ionospheric bubbles in the presence of zonal tidal winds. The simulated ionospheric bubble structures are consistent with recent observations in the SpreadFEx campaign.
Keskinen Michael J.
Vadas Sharon L.
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