A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox
Data from the VLF Doppler experiment at Faraday, Antarctica (65° S, 64° W) are used to study the penetration of the high-latitude convection electric field to lower latitudes during severely disturbed conditions. Alterations of the electric field at L-values within the range 2.0 - 2.7 are studied fo...
Published in: | Annales Geophysicae |
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Language: | English |
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Springer Verlag
1994
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Online Access: | https://doi.org/10.1007/s00585-994-0625-z https://noa.gwlb.de/receive/cop_mods_00038111 |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00038111 2023-05-15T14:02:33+02:00 A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox Balmforth, H. F. Clilverd, M. A. Smith, A. J. 1994-06 electronic https://doi.org/10.1007/s00585-994-0625-z https://noa.gwlb.de/receive/cop_mods_00038111 eng eng Springer Verlag 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/10.1007/s00585-994-0625-z https://noa.gwlb.de/receive/cop_mods_00038111 https://open-access.net/ uneingeschränkt info:eu-repo/semantics/restrictedAccess article Verlagsveröffentlichung article Text doc-type:article 1994 ftnonlinearchiv https://doi.org/10.1007/s00585-994-0625-z 2022-02-08T22:43:12Z Data from the VLF Doppler experiment at Faraday, Antarctica (65° S, 64° W) are used to study the penetration of the high-latitude convection electric field to lower latitudes during severely disturbed conditions. Alterations of the electric field at L-values within the range 2.0 - 2.7 are studied for two cases at equinox (10 - 12 September 1986 and 1 - 3 May 1986). The recovery of the electric field is found to be approximately an exponential function of time. Values for the equatorial meridional E×B drift velocity, inferred from the data, are used as inputs to a model of the plasmasphere and ionosphere. The model and experimental results are used to investigate the post-storm alteration of ionospheric coupling processes. The magnitude of the effect of ionosphere-plasmasphere coupling fluxes on NmF2 values and the O+-H+ transition height is dependent on the local time of storm commencement, and on the orientation of the electric field. The coupling fluxes appear to have a maximum influence on ionospheric content during the main phase of geomagnetic activity that produces outward motion of plasmaspheric whistler ducts. Article in Journal/Newspaper Antarc* Antarctica Niedersächsisches Online-Archiv NOA Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) Annales Geophysicae 12 7 625 635 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Balmforth, H. F. Clilverd, M. A. Smith, A. J. A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
topic_facet |
article Verlagsveröffentlichung |
description |
Data from the VLF Doppler experiment at Faraday, Antarctica (65° S, 64° W) are used to study the penetration of the high-latitude convection electric field to lower latitudes during severely disturbed conditions. Alterations of the electric field at L-values within the range 2.0 - 2.7 are studied for two cases at equinox (10 - 12 September 1986 and 1 - 3 May 1986). The recovery of the electric field is found to be approximately an exponential function of time. Values for the equatorial meridional E×B drift velocity, inferred from the data, are used as inputs to a model of the plasmasphere and ionosphere. The model and experimental results are used to investigate the post-storm alteration of ionospheric coupling processes. The magnitude of the effect of ionosphere-plasmasphere coupling fluxes on NmF2 values and the O+-H+ transition height is dependent on the local time of storm commencement, and on the orientation of the electric field. The coupling fluxes appear to have a maximum influence on ionospheric content during the main phase of geomagnetic activity that produces outward motion of plasmaspheric whistler ducts. |
format |
Article in Journal/Newspaper |
author |
Balmforth, H. F. Clilverd, M. A. Smith, A. J. |
author_facet |
Balmforth, H. F. Clilverd, M. A. Smith, A. J. |
author_sort |
Balmforth, H. F. |
title |
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
title_short |
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
title_full |
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
title_fullStr |
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
title_full_unstemmed |
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox |
title_sort |
case study of storm commencement and recovery plasmaspheric electric fields near l=2.5 at equinox |
publisher |
Springer Verlag |
publishDate |
1994 |
url |
https://doi.org/10.1007/s00585-994-0625-z https://noa.gwlb.de/receive/cop_mods_00038111 |
long_lat |
ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Faraday |
geographic_facet |
Faraday |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
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/10.1007/s00585-994-0625-z https://noa.gwlb.de/receive/cop_mods_00038111 |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00585-994-0625-z |
container_title |
Annales Geophysicae |
container_volume |
12 |
container_issue |
7 |
container_start_page |
625 |
op_container_end_page |
635 |
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1766272870967672832 |