Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail
A statistical analysis has been made of the incidence of auroral radio absorption events at South Pole, and of its dependence on basic geophysical parameters such as season, time of day, and magnetic activity level. It is found that at low and moderate levels of activity the incidence of events in t...
Published in: | Annales Geophysicae |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2007
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00032560 2023-05-15T18:22:22+02:00 Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail Hargreaves, J. K. 2007-03 electronic https://doi.org/10.5194/angeo-25-711-2007 https://noa.gwlb.de/receive/cop_mods_00032560 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032514/angeo-25-711-2007.pdf https://angeo.copernicus.org/articles/25/711/2007/angeo-25-711-2007.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-25-711-2007 https://noa.gwlb.de/receive/cop_mods_00032560 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032514/angeo-25-711-2007.pdf https://angeo.copernicus.org/articles/25/711/2007/angeo-25-711-2007.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/angeo-25-711-2007 2022-02-08T22:46:11Z A statistical analysis has been made of the incidence of auroral radio absorption events at South Pole, and of its dependence on basic geophysical parameters such as season, time of day, and magnetic activity level. It is found that at low and moderate levels of activity the incidence of events in the winter season is at least twice that in the summer. However, at high activity no events at all occurred during the local summer night, which appears to be explicable as the effect of the magnetotail and the consequent distortion of the magnetosphere when the southern polar region is tilted strongly towards the Sun. Previous results from even higher latitudes show the effect in an even more exaggerated form, in that both the day and night periods of absorption activity exhibit strong seasonal variations. Article in Journal/Newspaper South pole Niedersächsisches Online-Archiv NOA South Pole Annales Geophysicae 25 3 711 720 |
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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 Hargreaves, J. K. Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
topic_facet |
article Verlagsveröffentlichung |
description |
A statistical analysis has been made of the incidence of auroral radio absorption events at South Pole, and of its dependence on basic geophysical parameters such as season, time of day, and magnetic activity level. It is found that at low and moderate levels of activity the incidence of events in the winter season is at least twice that in the summer. However, at high activity no events at all occurred during the local summer night, which appears to be explicable as the effect of the magnetotail and the consequent distortion of the magnetosphere when the southern polar region is tilted strongly towards the Sun. Previous results from even higher latitudes show the effect in an even more exaggerated form, in that both the day and night periods of absorption activity exhibit strong seasonal variations. |
format |
Article in Journal/Newspaper |
author |
Hargreaves, J. K. |
author_facet |
Hargreaves, J. K. |
author_sort |
Hargreaves, J. K. |
title |
Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
title_short |
Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
title_full |
Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
title_fullStr |
Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
title_full_unstemmed |
Seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
title_sort |
seasonal variations in the incidence of auroral radio absorption events at very high latitude, and the influence of the magnetotail |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/angeo-25-711-2007 https://noa.gwlb.de/receive/cop_mods_00032560 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032514/angeo-25-711-2007.pdf https://angeo.copernicus.org/articles/25/711/2007/angeo-25-711-2007.pdf |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
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-25-711-2007 https://noa.gwlb.de/receive/cop_mods_00032560 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032514/angeo-25-711-2007.pdf https://angeo.copernicus.org/articles/25/711/2007/angeo-25-711-2007.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-25-711-2007 |
container_title |
Annales Geophysicae |
container_volume |
25 |
container_issue |
3 |
container_start_page |
711 |
op_container_end_page |
720 |
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