Reconfiguration of polar-cap plasma in the magnetic midnight sector
Radio tomography and the EISCAT and SuperDARN radars have been used to identify long-lived, high-altitude, cold plasma in the antisunward convective flow across the polar cap. The projection of the feature to later times suggests that it was reconfigured in the Harang discontinuity to form an enhanc...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00033086 2023-05-15T16:04:40+02:00 Reconfiguration of polar-cap plasma in the magnetic midnight sector Pryse, S. E. Wood, A. G. Middleton, H. R. McCrea, I. W. Lester, M. 2006-09 electronic https://doi.org/10.5194/angeo-24-2201-2006 https://noa.gwlb.de/receive/cop_mods_00033086 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00033040/angeo-24-2201-2006.pdf https://angeo.copernicus.org/articles/24/2201/2006/angeo-24-2201-2006.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-24-2201-2006 https://noa.gwlb.de/receive/cop_mods_00033086 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00033040/angeo-24-2201-2006.pdf https://angeo.copernicus.org/articles/24/2201/2006/angeo-24-2201-2006.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2006 ftnonlinearchiv https://doi.org/10.5194/angeo-24-2201-2006 2022-02-08T22:45:57Z Radio tomography and the EISCAT and SuperDARN radars have been used to identify long-lived, high-altitude, cold plasma in the antisunward convective flow across the polar cap. The projection of the feature to later times suggests that it was reconfigured in the Harang discontinuity to form an enhancement that was elongated in longitude in the sunward return flow of the high-latitude convection pattern. Comparison with a tomographic image at a later time supports the interpretation of a polar patch being reconfigured into a boundary blob. There is also evidence for a second plasma enhancement equatorward of the reconfigured blob, likely to have been produced by in situ precipitation. The observations indicate that the two mechanisms proposed in the literature for the production of boundary blobs are operating simultaneously to form two distinct density features separated slightly in latitude. Article in Journal/Newspaper EISCAT Niedersächsisches Online-Archiv NOA Annales Geophysicae 24 8 2201 2208 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Pryse, S. E. Wood, A. G. Middleton, H. R. McCrea, I. W. Lester, M. Reconfiguration of polar-cap plasma in the magnetic midnight sector |
topic_facet |
article Verlagsveröffentlichung |
description |
Radio tomography and the EISCAT and SuperDARN radars have been used to identify long-lived, high-altitude, cold plasma in the antisunward convective flow across the polar cap. The projection of the feature to later times suggests that it was reconfigured in the Harang discontinuity to form an enhancement that was elongated in longitude in the sunward return flow of the high-latitude convection pattern. Comparison with a tomographic image at a later time supports the interpretation of a polar patch being reconfigured into a boundary blob. There is also evidence for a second plasma enhancement equatorward of the reconfigured blob, likely to have been produced by in situ precipitation. The observations indicate that the two mechanisms proposed in the literature for the production of boundary blobs are operating simultaneously to form two distinct density features separated slightly in latitude. |
format |
Article in Journal/Newspaper |
author |
Pryse, S. E. Wood, A. G. Middleton, H. R. McCrea, I. W. Lester, M. |
author_facet |
Pryse, S. E. Wood, A. G. Middleton, H. R. McCrea, I. W. Lester, M. |
author_sort |
Pryse, S. E. |
title |
Reconfiguration of polar-cap plasma in the magnetic midnight sector |
title_short |
Reconfiguration of polar-cap plasma in the magnetic midnight sector |
title_full |
Reconfiguration of polar-cap plasma in the magnetic midnight sector |
title_fullStr |
Reconfiguration of polar-cap plasma in the magnetic midnight sector |
title_full_unstemmed |
Reconfiguration of polar-cap plasma in the magnetic midnight sector |
title_sort |
reconfiguration of polar-cap plasma in the magnetic midnight sector |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doi.org/10.5194/angeo-24-2201-2006 https://noa.gwlb.de/receive/cop_mods_00033086 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00033040/angeo-24-2201-2006.pdf https://angeo.copernicus.org/articles/24/2201/2006/angeo-24-2201-2006.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-24-2201-2006 https://noa.gwlb.de/receive/cop_mods_00033086 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00033040/angeo-24-2201-2006.pdf https://angeo.copernicus.org/articles/24/2201/2006/angeo-24-2201-2006.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-24-2201-2006 |
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Annales Geophysicae |
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24 |
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8 |
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2201 |
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2208 |
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