Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure
Abrupt changes in the solar wind dynamic pressure can greatly affect the Earth's magnetosphere-ionosphere system. We present an ionospheric flow vortex in the morning sector during the sudden decrease in the solar wind dynamic pressure. The flow vortex was clearly observed by both the Hankasalm...
Published in: | Journal of Geophysical Research: Space Physics |
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Online Access: | https://hdl.handle.net/10037/32267 https://doi.org/10.1029/2023JA031690 |
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ftunivtroemsoe:oai:munin.uit.no:10037/32267 2024-01-28T10:05:30+01:00 Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure Jin, Yaqi Moen, Jøran Idar Spicher, Andres Liu, Jianjun Clausen, Lasse Miloch, Wojciech Jacek 2023-10-30 https://hdl.handle.net/10037/32267 https://doi.org/10.1029/2023JA031690 eng eng Wiley Journal of Geophysical Research (JGR): Space Physics EC/H2020: 866357 Norges forskningsråd: 326039 Norges forskningsråd: 245683 info:eu-repo/grantAgreement/EC/H2020/866357/Norway/4DSpace: integrated study for space weather at high latitudes/POLAR-4DSpace/ Jin, Moen, Spicher, Liu, Clausen, Miloch. Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure. Journal of Geophysical Research (JGR): Space Physics. 2023;128(11) FRIDAID 2201715 doi:10.1029/2023JA031690 2169-9380 2169-9402 https://hdl.handle.net/10037/32267 Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by-nc/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1029/2023JA031690 2024-01-04T00:08:06Z Abrupt changes in the solar wind dynamic pressure can greatly affect the Earth's magnetosphere-ionosphere system. We present an ionospheric flow vortex in the morning sector during the sudden decrease in the solar wind dynamic pressure. The flow vortex was clearly observed by both the Hankasalmi radar and the azimuthal scan mode of the European Incoherent Scatter (EISCAT) Svalbard Radar (ESR). The flow vortex was first seen in the eastern field of view (FOV) of the Hankasalmi radar, and then propagated poleward and westward into the FOV of the ESR. During the passage of the flow vortex, a gradual decrease of electron density was observed by the field-aligned ESR 42 m antenna. When the equatorward directed ionospheric flow reached the ESR site, weak and visible increases in the electron density and electron temperature were observed. This impact was likely caused by soft electron precipitation associated with the clockwise flow vortex and upward field-aligned current. The azimuthal scan mode of the ESR 32 m radar at low elevation angle (30°) allowed us to measure key ionospheric parameters over a larger area (6° in latitude and 120° in azimuthal angle). The latitudinal scan of the electron temperature was used to proxy the equatorward auroral boundary, which shows that the flow vortex was located in the subauroral region. We further demonstrated that it is possible to study the weak increase of electron density by using GPS total electron content (TEC) data. A minor TEC increase was observed near the center of the flow vortex. Article in Journal/Newspaper EISCAT Svalbard University of Tromsø: Munin Open Research Archive Svalbard Journal of Geophysical Research: Space Physics 128 11 |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Abrupt changes in the solar wind dynamic pressure can greatly affect the Earth's magnetosphere-ionosphere system. We present an ionospheric flow vortex in the morning sector during the sudden decrease in the solar wind dynamic pressure. The flow vortex was clearly observed by both the Hankasalmi radar and the azimuthal scan mode of the European Incoherent Scatter (EISCAT) Svalbard Radar (ESR). The flow vortex was first seen in the eastern field of view (FOV) of the Hankasalmi radar, and then propagated poleward and westward into the FOV of the ESR. During the passage of the flow vortex, a gradual decrease of electron density was observed by the field-aligned ESR 42 m antenna. When the equatorward directed ionospheric flow reached the ESR site, weak and visible increases in the electron density and electron temperature were observed. This impact was likely caused by soft electron precipitation associated with the clockwise flow vortex and upward field-aligned current. The azimuthal scan mode of the ESR 32 m radar at low elevation angle (30°) allowed us to measure key ionospheric parameters over a larger area (6° in latitude and 120° in azimuthal angle). The latitudinal scan of the electron temperature was used to proxy the equatorward auroral boundary, which shows that the flow vortex was located in the subauroral region. We further demonstrated that it is possible to study the weak increase of electron density by using GPS total electron content (TEC) data. A minor TEC increase was observed near the center of the flow vortex. |
format |
Article in Journal/Newspaper |
author |
Jin, Yaqi Moen, Jøran Idar Spicher, Andres Liu, Jianjun Clausen, Lasse Miloch, Wojciech Jacek |
spellingShingle |
Jin, Yaqi Moen, Jøran Idar Spicher, Andres Liu, Jianjun Clausen, Lasse Miloch, Wojciech Jacek Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
author_facet |
Jin, Yaqi Moen, Jøran Idar Spicher, Andres Liu, Jianjun Clausen, Lasse Miloch, Wojciech Jacek |
author_sort |
Jin, Yaqi |
title |
Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
title_short |
Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
title_full |
Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
title_fullStr |
Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
title_full_unstemmed |
Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure |
title_sort |
ionospheric flow vortex induced by the sudden decrease in the solar wind dynamic pressure |
publisher |
Wiley |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/32267 https://doi.org/10.1029/2023JA031690 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_relation |
Journal of Geophysical Research (JGR): Space Physics EC/H2020: 866357 Norges forskningsråd: 326039 Norges forskningsråd: 245683 info:eu-repo/grantAgreement/EC/H2020/866357/Norway/4DSpace: integrated study for space weather at high latitudes/POLAR-4DSpace/ Jin, Moen, Spicher, Liu, Clausen, Miloch. Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure. Journal of Geophysical Research (JGR): Space Physics. 2023;128(11) FRIDAID 2201715 doi:10.1029/2023JA031690 2169-9380 2169-9402 https://hdl.handle.net/10037/32267 |
op_rights |
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by-nc/4.0 |
op_doi |
https://doi.org/10.1029/2023JA031690 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
128 |
container_issue |
11 |
_version_ |
1789331805221945344 |