Evidence of meso-scale structure in the high-latitude thermosphere
There is a widely held assumption that the thermospheric neutral gas is slow to respond to magnetospheric forcing owing to its large inertia and therefore, may be treated as a steady state background medium for the more dynamic ionosphere. This is shown to be over simplistic. The data presented here...
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ftcopernicus:oai:publications.copernicus.org:angeo34535 2023-05-15T16:04:39+02:00 Evidence of meso-scale structure in the high-latitude thermosphere Aruliah, A. L. Griffin, E. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-19-37-2001 https://angeo.copernicus.org/articles/19/37/2001/ eng eng doi:10.5194/angeo-19-37-2001 https://angeo.copernicus.org/articles/19/37/2001/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-19-37-2001 2020-07-20T16:27:56Z There is a widely held assumption that the thermospheric neutral gas is slow to respond to magnetospheric forcing owing to its large inertia and therefore, may be treated as a steady state background medium for the more dynamic ionosphere. This is shown to be over simplistic. The data presented here compare direct measurements of the thermospheric neutral winds made in Northern Scandinavia by Fabry-Perot Interferometers (FPIs) with direct measurements of the ionosphere made by the EISCAT radar and with model simulations. These comparisons will show that the neutral atmosphere is capable of responding to ionospheric changes on mesoscale levels, i.e., spatial and temporal scale sizes of less than a few hundred kilometres and tens of minutes, respectively. Key words. Atmospheric composition and structure (air-glow and aurora; instruments and techniques) – Ionosphere (ionosphere-atmosphere interactions) Text EISCAT Copernicus Publications: E-Journals Annales Geophysicae 19 1 37 46 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
There is a widely held assumption that the thermospheric neutral gas is slow to respond to magnetospheric forcing owing to its large inertia and therefore, may be treated as a steady state background medium for the more dynamic ionosphere. This is shown to be over simplistic. The data presented here compare direct measurements of the thermospheric neutral winds made in Northern Scandinavia by Fabry-Perot Interferometers (FPIs) with direct measurements of the ionosphere made by the EISCAT radar and with model simulations. These comparisons will show that the neutral atmosphere is capable of responding to ionospheric changes on mesoscale levels, i.e., spatial and temporal scale sizes of less than a few hundred kilometres and tens of minutes, respectively. Key words. Atmospheric composition and structure (air-glow and aurora; instruments and techniques) – Ionosphere (ionosphere-atmosphere interactions) |
format |
Text |
author |
Aruliah, A. L. Griffin, E. |
spellingShingle |
Aruliah, A. L. Griffin, E. Evidence of meso-scale structure in the high-latitude thermosphere |
author_facet |
Aruliah, A. L. Griffin, E. |
author_sort |
Aruliah, A. L. |
title |
Evidence of meso-scale structure in the high-latitude thermosphere |
title_short |
Evidence of meso-scale structure in the high-latitude thermosphere |
title_full |
Evidence of meso-scale structure in the high-latitude thermosphere |
title_fullStr |
Evidence of meso-scale structure in the high-latitude thermosphere |
title_full_unstemmed |
Evidence of meso-scale structure in the high-latitude thermosphere |
title_sort |
evidence of meso-scale structure in the high-latitude thermosphere |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-19-37-2001 https://angeo.copernicus.org/articles/19/37/2001/ |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-19-37-2001 https://angeo.copernicus.org/articles/19/37/2001/ |
op_doi |
https://doi.org/10.5194/angeo-19-37-2001 |
container_title |
Annales Geophysicae |
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19 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
46 |
_version_ |
1766400264140488704 |