Observations of diverging field-aligned ion flow with the ESR
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the F-region and downward below the peak. We estimate that in such events mass transport along the field line is...
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Copernicus Publications
2004
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00035004 2023-05-15T16:04:40+02:00 Observations of diverging field-aligned ion flow with the ESR Buchert, S. C. Ogawa, Y. Fujii, R. van Eyken, A. P. 2004-03 electronic https://doi.org/10.5194/angeo-22-889-2004 https://noa.gwlb.de/receive/cop_mods_00035004 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034958/angeo-22-889-2004.pdf https://angeo.copernicus.org/articles/22/889/2004/angeo-22-889-2004.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-22-889-2004 https://noa.gwlb.de/receive/cop_mods_00035004 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034958/angeo-22-889-2004.pdf https://angeo.copernicus.org/articles/22/889/2004/angeo-22-889-2004.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2004 ftnonlinearchiv https://doi.org/10.5194/angeo-22-889-2004 2022-02-08T22:44:56Z We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the F-region and downward below the peak. We estimate that in such events mass transport along the field line is important for the ionization balance, and that the shape of the F-layer and its ion composition should be strongly influenced by it. Diverging flow typically occurs when there are signatures of direct entry of sheath plasma to the ionosphere in the form of intense soft particle precipitation, and we suggest that it is caused by the ionization and ionospheric electron heating associated with this precipitation. On average, 30% of all events with ion upflow also show significant ion downflow below. Key words.Ionosphere (polar ionosphere; ionization mechanism; plasma temperature and density) Article in Journal/Newspaper EISCAT Svalbard Niedersächsisches Online-Archiv NOA Svalbard Annales Geophysicae 22 3 889 899 |
institution |
Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Buchert, S. C. Ogawa, Y. Fujii, R. van Eyken, A. P. Observations of diverging field-aligned ion flow with the ESR |
topic_facet |
article Verlagsveröffentlichung |
description |
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the F-region and downward below the peak. We estimate that in such events mass transport along the field line is important for the ionization balance, and that the shape of the F-layer and its ion composition should be strongly influenced by it. Diverging flow typically occurs when there are signatures of direct entry of sheath plasma to the ionosphere in the form of intense soft particle precipitation, and we suggest that it is caused by the ionization and ionospheric electron heating associated with this precipitation. On average, 30% of all events with ion upflow also show significant ion downflow below. Key words.Ionosphere (polar ionosphere; ionization mechanism; plasma temperature and density) |
format |
Article in Journal/Newspaper |
author |
Buchert, S. C. Ogawa, Y. Fujii, R. van Eyken, A. P. |
author_facet |
Buchert, S. C. Ogawa, Y. Fujii, R. van Eyken, A. P. |
author_sort |
Buchert, S. C. |
title |
Observations of diverging field-aligned ion flow with the ESR |
title_short |
Observations of diverging field-aligned ion flow with the ESR |
title_full |
Observations of diverging field-aligned ion flow with the ESR |
title_fullStr |
Observations of diverging field-aligned ion flow with the ESR |
title_full_unstemmed |
Observations of diverging field-aligned ion flow with the ESR |
title_sort |
observations of diverging field-aligned ion flow with the esr |
publisher |
Copernicus Publications |
publishDate |
2004 |
url |
https://doi.org/10.5194/angeo-22-889-2004 https://noa.gwlb.de/receive/cop_mods_00035004 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034958/angeo-22-889-2004.pdf https://angeo.copernicus.org/articles/22/889/2004/angeo-22-889-2004.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-22-889-2004 https://noa.gwlb.de/receive/cop_mods_00035004 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00034958/angeo-22-889-2004.pdf https://angeo.copernicus.org/articles/22/889/2004/angeo-22-889-2004.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-22-889-2004 |
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Annales Geophysicae |
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22 |
container_issue |
3 |
container_start_page |
889 |
op_container_end_page |
899 |
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