Spatial structure of summertime ionospheric plasma near magnetic noon
Results are presented from a multi-instrument study of the spatial distribution of the summertime, polar ionospheric electron density under conditions of relatively stable IMF Bz<0. The EISCAT Svalbard radar revealed a region of enhanced densities near magnetic noon that, when comparing radar sca...
Published in: | Annales Geophysicae |
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Language: | English |
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2005
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Online Access: | https://doi.org/10.5194/angeo-23-25-2005 https://noa.gwlb.de/receive/cop_mods_00034400 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034354/angeo-23-25-2005.pdf https://angeo.copernicus.org/articles/23/25/2005/angeo-23-25-2005.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00034400 2023-05-15T16:04:44+02:00 Spatial structure of summertime ionospheric plasma near magnetic noon Sims, R. W. Pryse, S. E. Denig, W. F. 2005-01 electronic https://doi.org/10.5194/angeo-23-25-2005 https://noa.gwlb.de/receive/cop_mods_00034400 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034354/angeo-23-25-2005.pdf https://angeo.copernicus.org/articles/23/25/2005/angeo-23-25-2005.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-23-25-2005 https://noa.gwlb.de/receive/cop_mods_00034400 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034354/angeo-23-25-2005.pdf https://angeo.copernicus.org/articles/23/25/2005/angeo-23-25-2005.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2005 ftnonlinearchiv https://doi.org/10.5194/angeo-23-25-2005 2022-02-08T22:45:16Z Results are presented from a multi-instrument study of the spatial distribution of the summertime, polar ionospheric electron density under conditions of relatively stable IMF Bz<0. The EISCAT Svalbard radar revealed a region of enhanced densities near magnetic noon that, when comparing radar scans from different local times, appeared to be spatially confined in longitude. This was identified as the tongue-of-ionisation (TOI) that comprised photoionisation of sub-auroral origin that is drawn poleward into the polar cap by the anti-sunward flow of the high-latitude convection. The TOI was bounded in longitude by high-latitude troughs; the pre-noon trough on the morning side with a minimum near 78° N and the post-noon trough on the afternoon side with a minimum at 80° N. Complementary measurements by radio tomography, the SuperDARN radars, and a DMSP satellite, together with comparisons with earlier modelling work, provided supporting evidence for the interpretation of the density structuring, and highlighted the role of plasma convection in the formation of summertime plasma distribution. Soft particle precipitation played only a secondary role in the modulation of the large summertime densities entering the polar cap. Article in Journal/Newspaper EISCAT Svalbard Niedersächsisches Online-Archiv NOA Svalbard Annales Geophysicae 23 1 25 37 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Sims, R. W. Pryse, S. E. Denig, W. F. Spatial structure of summertime ionospheric plasma near magnetic noon |
topic_facet |
article Verlagsveröffentlichung |
description |
Results are presented from a multi-instrument study of the spatial distribution of the summertime, polar ionospheric electron density under conditions of relatively stable IMF Bz<0. The EISCAT Svalbard radar revealed a region of enhanced densities near magnetic noon that, when comparing radar scans from different local times, appeared to be spatially confined in longitude. This was identified as the tongue-of-ionisation (TOI) that comprised photoionisation of sub-auroral origin that is drawn poleward into the polar cap by the anti-sunward flow of the high-latitude convection. The TOI was bounded in longitude by high-latitude troughs; the pre-noon trough on the morning side with a minimum near 78° N and the post-noon trough on the afternoon side with a minimum at 80° N. Complementary measurements by radio tomography, the SuperDARN radars, and a DMSP satellite, together with comparisons with earlier modelling work, provided supporting evidence for the interpretation of the density structuring, and highlighted the role of plasma convection in the formation of summertime plasma distribution. Soft particle precipitation played only a secondary role in the modulation of the large summertime densities entering the polar cap. |
format |
Article in Journal/Newspaper |
author |
Sims, R. W. Pryse, S. E. Denig, W. F. |
author_facet |
Sims, R. W. Pryse, S. E. Denig, W. F. |
author_sort |
Sims, R. W. |
title |
Spatial structure of summertime ionospheric plasma near magnetic noon |
title_short |
Spatial structure of summertime ionospheric plasma near magnetic noon |
title_full |
Spatial structure of summertime ionospheric plasma near magnetic noon |
title_fullStr |
Spatial structure of summertime ionospheric plasma near magnetic noon |
title_full_unstemmed |
Spatial structure of summertime ionospheric plasma near magnetic noon |
title_sort |
spatial structure of summertime ionospheric plasma near magnetic noon |
publisher |
Copernicus Publications |
publishDate |
2005 |
url |
https://doi.org/10.5194/angeo-23-25-2005 https://noa.gwlb.de/receive/cop_mods_00034400 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034354/angeo-23-25-2005.pdf https://angeo.copernicus.org/articles/23/25/2005/angeo-23-25-2005.pdf |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
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-23-25-2005 https://noa.gwlb.de/receive/cop_mods_00034400 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034354/angeo-23-25-2005.pdf https://angeo.copernicus.org/articles/23/25/2005/angeo-23-25-2005.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-23-25-2005 |
container_title |
Annales Geophysicae |
container_volume |
23 |
container_issue |
1 |
container_start_page |
25 |
op_container_end_page |
37 |
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1766400355442098176 |