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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ftoslouniv:oai:www.duo.uio.no:10852/82775 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 2020-07-22T14:50:06Z http://hdl.handle.net/10852/82775 http://urn.nb.no/URN:NBN:no-85606 https://doi.org/10.1029/2019JA027734 EN eng NFR/275653 NFR/223252 http://urn.nb.no/URN:NBN:no-85606 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. Journal of Geophysical Research (JGR): Space Physics. 2020, 125(6) http://hdl.handle.net/10852/82775 1820203 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 (JGR): Space Physics&rft.volume=125&rft.spage=&rft.date=2020 Journal of Geophysical Research (JGR): Space Physics 125 6 0 https://doi.org/10.1029/2019JA027734 URN:NBN:no-85606 Fulltext https://www.duo.uio.no/bitstream/handle/10852/82775/2/Spicher_2019JA027734.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2169-9380 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1029/2019JA027734 2021-02-03T23:30:59Z 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. Article in Journal/Newspaper Svalbard Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Svalbard Journal of Geophysical Research: Space Physics 125 6 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
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. |
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 |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/82775 http://urn.nb.no/URN:NBN:no-85606 https://doi.org/10.1029/2019JA027734 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
2169-9380 |
op_relation |
NFR/275653 NFR/223252 http://urn.nb.no/URN:NBN:no-85606 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. Journal of Geophysical Research (JGR): Space Physics. 2020, 125(6) http://hdl.handle.net/10852/82775 1820203 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 (JGR): Space Physics&rft.volume=125&rft.spage=&rft.date=2020 Journal of Geophysical Research (JGR): Space Physics 125 6 0 https://doi.org/10.1029/2019JA027734 URN:NBN:no-85606 Fulltext https://www.duo.uio.no/bitstream/handle/10852/82775/2/Spicher_2019JA027734.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019JA027734 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
125 |
container_issue |
6 |
_version_ |
1766213069138034688 |