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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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ANGEO | Articles | Volume 37, issue 2
Ann. Geophys., 37, 201–214, 2019
https://doi.org/10.5194/angeo-37-201-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Ann. Geophys., 37, 201–214, 2019
https://doi.org/10.5194/angeo-37-201-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 09 Apr 2019

Regular paper | 09 Apr 2019

On the convection of ionospheric density features

John D. de Boer et al.

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Short summary
Modelling aurorae, we asked what boundary condition (BC) to use for the E field on the upper boundary. Typically a Dirichlet BC is used, since processes above the domain generate E. But then conductivity structures trigger FACs driven immediately by magnetospheric convection, even though it is a finite energy source, delayed by the Alfvén speed. If the BC is not ideal, then E x B drift in the ionosphere depends on the plasma's properties. So we investigated.
Modelling aurorae, we asked what boundary condition (BC) to use for the E field on the upper...
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