The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields
We have developed a new high resolution two-dimensional model of the high latitude ionosphere in which nonlinear advection terms are closely coupled with the electrodynamics. The model provides a self-consistent description of the ionospheric feedback on the electrodynamical perturbations produce...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2010-06-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/28/1345/2010/angeo-28-1345-2010.pdf |
| _version_ | 1818684806781730816 |
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| author | J. D. de Boer J.-M. A. Noël J.-P. St.-Maurice |
| author_facet | J. D. de Boer J.-M. A. Noël J.-P. St.-Maurice |
| author_sort | J. D. de Boer |
| collection | DOAJ |
| description | We have developed a new high resolution two-dimensional model of the high
latitude ionosphere in which nonlinear advection terms are closely coupled
with the electrodynamics. The model provides a self-consistent description of
the ionospheric feedback on the electrodynamical perturbations produced by
auroral arc-related particle precipitation in regions with strong ambient
electric fields. We find in particular that a heretofore neglected ion
Pedersen advection term can introduce considerable changes in the electron
density profile, the current density distribution, the conductivities and the
electron temperatures. We find that the convective effects can carry the
ionisation more than 150 km outside the precipitation region in a few
minutes, with attendant large changes in the current distribution and
E-region densities that become enhanced outside the region of
particle precipitation. The production of a tongue of ionisation that slowly
decays outside the auroral boundaries contrasts with the sharp geometric
cut-off and associated stronger current densities found in previous studies. |
| first_indexed | 2024-12-17T10:56:29Z |
| format | Article |
| id | doaj.art-538f1bf9057a4bde90ad39bb5da3c4d0 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-17T10:56:29Z |
| publishDate | 2010-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-538f1bf9057a4bde90ad39bb5da3c4d02022-12-21T21:51:48ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762010-06-01281345136010.5194/angeo-28-1345-2010The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fieldsJ. D. de Boer0J.-M. A. Noël1J.-P. St.-Maurice2Department of Physics, Royal Military College of Canada, Kingston, Ontario, CanadaDepartment of Physics, Royal Military College of Canada, Kingston, Ontario, CanadaInstitute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, CanadaWe have developed a new high resolution two-dimensional model of the high latitude ionosphere in which nonlinear advection terms are closely coupled with the electrodynamics. The model provides a self-consistent description of the ionospheric feedback on the electrodynamical perturbations produced by auroral arc-related particle precipitation in regions with strong ambient electric fields. We find in particular that a heretofore neglected ion Pedersen advection term can introduce considerable changes in the electron density profile, the current density distribution, the conductivities and the electron temperatures. We find that the convective effects can carry the ionisation more than 150 km outside the precipitation region in a few minutes, with attendant large changes in the current distribution and E-region densities that become enhanced outside the region of particle precipitation. The production of a tongue of ionisation that slowly decays outside the auroral boundaries contrasts with the sharp geometric cut-off and associated stronger current densities found in previous studies.https://www.ann-geophys.net/28/1345/2010/angeo-28-1345-2010.pdf |
| spellingShingle | J. D. de Boer J.-M. A. Noël J.-P. St.-Maurice The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields Annales Geophysicae |
| title | The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields |
| title_full | The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields |
| title_fullStr | The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields |
| title_full_unstemmed | The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields |
| title_short | The effects of mesoscale regions of precipitation on the ionospheric dynamics, electrodynamics and electron density in the presence of strong ambient electric fields |
| title_sort | effects of mesoscale regions of precipitation on the ionospheric dynamics electrodynamics and electron density in the presence of strong ambient electric fields |
| url | https://www.ann-geophys.net/28/1345/2010/angeo-28-1345-2010.pdf |
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