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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Language: | English |
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American Geophysical Union (AGU)
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Online Access: | http://hdl.handle.net/10852/63192 http://urn.nb.no/URN:NBN:no-65738 https://doi.org/10.1002/2017JA023904 |
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ftoslouniv:oai:www.duo.uio.no:10852/63192 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. 2017-09-16T13:05:39Z http://hdl.handle.net/10852/63192 http://urn.nb.no/URN:NBN:no-65738 https://doi.org/10.1002/2017JA023904 EN eng American Geophysical Union (AGU) NFR/212014 NFR/230996 NFR/223252 NFR/230935 http://urn.nb.no/URN:NBN:no-65738 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. Journal of Geophysical Research - Biogeosciences. 2017, 122(5), 4943-4959 http://hdl.handle.net/10852/63192 1494273 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geophysical Research - Biogeosciences&rft.volume=122&rft.spage=4943&rft.date=2017 Journal of Geophysical Research - Biogeosciences 122 5 4943 4959 http://dx.doi.org/10.1002/2017JA023904 URN:NBN:no-65738 Fulltext https://www.duo.uio.no/bitstream/handle/10852/63192/1/Kim_et_al-2017-Journal_of_Geophysical_Research__Space_Physics.pdf 2169-8953 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.1002/2017JA023904 2020-06-21T08:51:36Z 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. © 2017 American Geophysical Union Article in Journal/Newspaper EISCAT Svalbard Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Svalbard Journal of Geophysical Research: Space Physics 122 5 4943 4959 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
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. © 2017 American Geophysical Union |
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 (AGU) |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/63192 http://urn.nb.no/URN:NBN:no-65738 https://doi.org/10.1002/2017JA023904 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
2169-8953 |
op_relation |
NFR/212014 NFR/230996 NFR/223252 NFR/230935 http://urn.nb.no/URN:NBN:no-65738 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. Journal of Geophysical Research - Biogeosciences. 2017, 122(5), 4943-4959 http://hdl.handle.net/10852/63192 1494273 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geophysical Research - Biogeosciences&rft.volume=122&rft.spage=4943&rft.date=2017 Journal of Geophysical Research - Biogeosciences 122 5 4943 4959 http://dx.doi.org/10.1002/2017JA023904 URN:NBN:no-65738 Fulltext https://www.duo.uio.no/bitstream/handle/10852/63192/1/Kim_et_al-2017-Journal_of_Geophysical_Research__Space_Physics.pdf |
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 |
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1766400156615311360 |