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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 31, issue 12
Ann. Geophys., 31, 2157–2162, 2013
https://doi.org/10.5194/angeo-31-2157-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: C/NOFS results and equatorial ionospheric dynamics

Ann. Geophys., 31, 2157–2162, 2013
https://doi.org/10.5194/angeo-31-2157-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 05 Dec 2013

Regular paper | 05 Dec 2013

Equatorial spread F studies using SAMI3 with two-dimensional and three-dimensional electrostatics

H. C. Aveiro1 and J. D. Huba2 H. C. Aveiro and J. D. Huba
  • 1National Research Council Postdoctoral Fellow at the Naval Research Laboratory, Washington, DC, USA
  • 2Plasma Physics Division, Naval Research Laboratory, Washington, DC, USA

Abstract. This letter presents a study of equatorial F region irregularities using the NRL SAMI3/ESF model, comparing results using a two-dimensional (2-D) and a three-dimensional (3-D) electrostatic potential solution. For the 3-D potential solution, two cases are considered for parallel plasma transport: (1) transport based on the parallel ambipolar field, and (2) transport based on the parallel electric field. The results show that the growth rate of the generalized Rayleigh–Taylor instability is not affected by the choice of the potential solution. However, differences are observed in the structures of the irregularities between the 2-D and 3-D solutions. Additionally, the plasma velocity along the geomagnetic field computed using the full 3-D solution shows complex structures that are not captured by the simplified model. This points out that only the full 3-D model is able to fully capture the complex physics of the equatorial F region.

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