On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels
We present a multi‐instrument multiscale study of a channel of enhanced, inhomogeneous flow in the cusp ionosphere occurring on November 30, 2014. We provide evidence that strong Global Navigation Satellite System (GNSS) phase scintillations indices (σϕ>0.5 rad) can arise from such events, indica...
Published in: | Journal of Geophysical Research: Space Physics |
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Online Access: | https://hdl.handle.net/11250/2740332 https://doi.org/10.1029/2019JA027734 |
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ftunivbergen:oai:bora.uib.no:11250/2740332 2023-05-15T18:29:44+02:00 On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels Spicher, Andres Deshpande, Kshitija Jin, Yaqi Oksavik, Kjellmar Zettergren, Matthew D. Clausen, Lasse Boy Novock Moen, Jøran Idar Hairston, Marc R. Baddeley, Lisa 2020 application/pdf https://hdl.handle.net/11250/2740332 https://doi.org/10.1029/2019JA027734 eng eng Wiley Norges forskningsråd: 275653 urn:issn:2169-9380 https://hdl.handle.net/11250/2740332 https://doi.org/10.1029/2019JA027734 cristin:1820203 Journal of Geophysical Research: Space Physics. 2020, 125 (6), e2019JA027734. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. e2019JA027734 Journal of Geophysical Research (JGR): Space Physics 125 6 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1029/2019JA027734 2023-03-14T17:41:15Z We present a multi‐instrument multiscale study of a channel of enhanced, inhomogeneous flow in the cusp ionosphere occurring on November 30, 2014. We provide evidence that strong Global Navigation Satellite System (GNSS) phase scintillations indices (σϕ>0.5 rad) can arise from such events, indicating that they are important in the context of space weather impacts on technology. We compare in detail two‐dimensional maps of ionospheric density, velocity, and temperatures obtained by the European Incoherent Scatter Scientific Association Svalbard Radar with scintillation indices detected from a network of four GNSS receivers around Svalbard and examine the different sources of free energy for irregularity creation. We observe that the strongest phase scintillations occur on the poleward side of the flow channel in a region of sheared plasma motion and structured low‐energy particle precipitation. As inhomogeneous plasma flows are evident in our observations, we perform a quantitative, nonlinear analysis of the Kelvin–Helmholtz instability (KHI) and its impact on phase scintillations using numerical simulations from the first principles‐based Geospace Environment Model of Ion‐Neutral Interactions and Satellite‐beacon Ionospheric‐scintillation Global Model of the upper Atmosphere. Using representative values consistent with the radar data, we show that KHI can efficiently create density structures along with considerable scintillations and is thus likely to contribute significantly under similar conditions, which are frequent in the cusp. publishedVersion Article in Journal/Newspaper Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Svalbard Journal of Geophysical Research: Space Physics 125 6 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
We present a multi‐instrument multiscale study of a channel of enhanced, inhomogeneous flow in the cusp ionosphere occurring on November 30, 2014. We provide evidence that strong Global Navigation Satellite System (GNSS) phase scintillations indices (σϕ>0.5 rad) can arise from such events, indicating that they are important in the context of space weather impacts on technology. We compare in detail two‐dimensional maps of ionospheric density, velocity, and temperatures obtained by the European Incoherent Scatter Scientific Association Svalbard Radar with scintillation indices detected from a network of four GNSS receivers around Svalbard and examine the different sources of free energy for irregularity creation. We observe that the strongest phase scintillations occur on the poleward side of the flow channel in a region of sheared plasma motion and structured low‐energy particle precipitation. As inhomogeneous plasma flows are evident in our observations, we perform a quantitative, nonlinear analysis of the Kelvin–Helmholtz instability (KHI) and its impact on phase scintillations using numerical simulations from the first principles‐based Geospace Environment Model of Ion‐Neutral Interactions and Satellite‐beacon Ionospheric‐scintillation Global Model of the upper Atmosphere. Using representative values consistent with the radar data, we show that KHI can efficiently create density structures along with considerable scintillations and is thus likely to contribute significantly under similar conditions, which are frequent in the cusp. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Spicher, Andres Deshpande, Kshitija Jin, Yaqi Oksavik, Kjellmar Zettergren, Matthew D. Clausen, Lasse Boy Novock Moen, Jøran Idar Hairston, Marc R. Baddeley, Lisa |
spellingShingle |
Spicher, Andres Deshpande, Kshitija Jin, Yaqi Oksavik, Kjellmar Zettergren, Matthew D. Clausen, Lasse Boy Novock Moen, Jøran Idar Hairston, Marc R. Baddeley, Lisa On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
author_facet |
Spicher, Andres Deshpande, Kshitija Jin, Yaqi Oksavik, Kjellmar Zettergren, Matthew D. Clausen, Lasse Boy Novock Moen, Jøran Idar Hairston, Marc R. Baddeley, Lisa |
author_sort |
Spicher, Andres |
title |
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
title_short |
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
title_full |
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
title_fullStr |
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
title_full_unstemmed |
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels |
title_sort |
on the production of ionospheric irregularities via kelvin-helmholtz instability associated with cusp flow channels |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2740332 https://doi.org/10.1029/2019JA027734 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
e2019JA027734 Journal of Geophysical Research (JGR): Space Physics 125 6 |
op_relation |
Norges forskningsråd: 275653 urn:issn:2169-9380 https://hdl.handle.net/11250/2740332 https://doi.org/10.1029/2019JA027734 cristin:1820203 Journal of Geophysical Research: Space Physics. 2020, 125 (6), e2019JA027734. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. |
op_doi |
https://doi.org/10.1029/2019JA027734 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
125 |
container_issue |
6 |
_version_ |
1766213067770691584 |