Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling
We present simultaneous observations of magnetosphere-ionosphere-thermosphere coupling over Svalbard during a traveling convection vortex (TCV) event. Various spaceborne and ground-based instruments made coordinated measurements, including magnetometers, particle detectors, an all-sky camera, Europe...
Published in: | Journal of Geophysical Research: Space Physics |
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ftunivbergen:oai:bora.uib.no:1956/17373 2023-05-15T16:04:34+02:00 Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling Kim, Hyomin Lessard, Marc R. Jones, Sarah L. Lynch, Kristina A. Fernandes, Philip A. Aruliah, Anasuya L. Engebretson, Mark J. Moen, Jøran Idar Oksavik, Kjellmar Yahnin, Alexander G. Yeoman, Timothy K. 2018-01-29T17:43:55Z application/pdf https://hdl.handle.net/1956/17373 https://doi.org/10.1002/2017ja023904 eng eng American Geophysical Union http://onlinelibrary.wiley.com/doi/10.1002/2017JA023904/abstract Norges forskningsråd: 212014 Norges forskningsråd: 230996 Norges forskningsråd: 223252 Norges forskningsråd: 230935 urn:issn:2169-9402 https://hdl.handle.net/1956/17373 https://doi.org/10.1002/2017ja023904 cristin:1494273 Copyright 2017 American Geophysical Union. All Rights Reserved Journal of Geophysical Research - Biogeosciences Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.1002/2017ja023904 2023-03-14T17:40:46Z We present simultaneous observations of magnetosphere-ionosphere-thermosphere coupling over Svalbard during a traveling convection vortex (TCV) event. Various spaceborne and ground-based instruments made coordinated measurements, including magnetometers, particle detectors, an all-sky camera, European Incoherent Scatter (EISCAT) Svalbard Radar, Super Dual Auroral Radar Network (SuperDARN), and SCANning Doppler Imager (SCANDI). The instruments recorded TCVs associated with a sudden change in solar wind dynamic pressure. The data display typical features of TCVs including vortical ionospheric convection patterns seen by the ground magnetometers and SuperDARN radars and auroral precipitation near the cusp observed by the all-sky camera. Simultaneously, electron and ion temperature enhancements with corresponding density increase from soft precipitation are also observed by the EISCAT Svalbard Radar. The ground magnetometers also detected electromagnetic ion cyclotron waves at the approximate time of the TCV arrival. This implies that they were generated by a temperature anisotropy resulting from a compression on the dayside magnetosphere. SCANDI data show a divergence in thermospheric winds during the TCVs, presumably due to thermospheric heating associated with the current closure linked to a field-aligned current system generated by the TCVs. We conclude that solar wind pressure impulse-related transient phenomena can affect even the upper atmospheric dynamics via current systems established by a magnetosphere-ionosphere-thermosphere coupling process. publishedVersion Article in Journal/Newspaper EISCAT Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Svalbard Journal of Geophysical Research: Space Physics 122 5 4943 4959 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
We present simultaneous observations of magnetosphere-ionosphere-thermosphere coupling over Svalbard during a traveling convection vortex (TCV) event. Various spaceborne and ground-based instruments made coordinated measurements, including magnetometers, particle detectors, an all-sky camera, European Incoherent Scatter (EISCAT) Svalbard Radar, Super Dual Auroral Radar Network (SuperDARN), and SCANning Doppler Imager (SCANDI). The instruments recorded TCVs associated with a sudden change in solar wind dynamic pressure. The data display typical features of TCVs including vortical ionospheric convection patterns seen by the ground magnetometers and SuperDARN radars and auroral precipitation near the cusp observed by the all-sky camera. Simultaneously, electron and ion temperature enhancements with corresponding density increase from soft precipitation are also observed by the EISCAT Svalbard Radar. The ground magnetometers also detected electromagnetic ion cyclotron waves at the approximate time of the TCV arrival. This implies that they were generated by a temperature anisotropy resulting from a compression on the dayside magnetosphere. SCANDI data show a divergence in thermospheric winds during the TCVs, presumably due to thermospheric heating associated with the current closure linked to a field-aligned current system generated by the TCVs. We conclude that solar wind pressure impulse-related transient phenomena can affect even the upper atmospheric dynamics via current systems established by a magnetosphere-ionosphere-thermosphere coupling process. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Kim, Hyomin Lessard, Marc R. Jones, Sarah L. Lynch, Kristina A. Fernandes, Philip A. Aruliah, Anasuya L. Engebretson, Mark J. Moen, Jøran Idar Oksavik, Kjellmar Yahnin, Alexander G. Yeoman, Timothy K. |
spellingShingle |
Kim, Hyomin Lessard, Marc R. Jones, Sarah L. Lynch, Kristina A. Fernandes, Philip A. Aruliah, Anasuya L. Engebretson, Mark J. Moen, Jøran Idar Oksavik, Kjellmar Yahnin, Alexander G. Yeoman, Timothy K. Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
author_facet |
Kim, Hyomin Lessard, Marc R. Jones, Sarah L. Lynch, Kristina A. Fernandes, Philip A. Aruliah, Anasuya L. Engebretson, Mark J. Moen, Jøran Idar Oksavik, Kjellmar Yahnin, Alexander G. Yeoman, Timothy K. |
author_sort |
Kim, Hyomin |
title |
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
title_short |
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
title_full |
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
title_fullStr |
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
title_full_unstemmed |
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling |
title_sort |
simultaneous observations of traveling convection vortices: ionosphere-thermosphere coupling |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/17373 https://doi.org/10.1002/2017ja023904 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Journal of Geophysical Research - Biogeosciences |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1002/2017JA023904/abstract Norges forskningsråd: 212014 Norges forskningsråd: 230996 Norges forskningsråd: 223252 Norges forskningsråd: 230935 urn:issn:2169-9402 https://hdl.handle.net/1956/17373 https://doi.org/10.1002/2017ja023904 cristin:1494273 |
op_rights |
Copyright 2017 American Geophysical Union. All Rights Reserved |
op_doi |
https://doi.org/10.1002/2017ja023904 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
122 |
container_issue |
5 |
container_start_page |
4943 |
op_container_end_page |
4959 |
_version_ |
1766400160679591936 |