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

M. J. Keskinen, S. L. Ossakow, B. G. Fejer

doi:10.1029/2003gl017418

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

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M. J. Keskinen

Charged Particle Physics Branch, Plasma Physics Division Naval Research Laboratory Washington DC USA
S. L. Ossakow

Plasma Physics Division Naval Research Laboratory Washington DC USA
B. G. Fejer

Center for Atmospheric and Space Studies Utah State University Logan Utah USA

書誌事項

公開日: 2003-08

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/2003gl017418

公開者: American Geophysical Union (AGU)

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説明

<jats:p>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.</jats:p>