The dynamics of quasi-periodic ripples in the high-latitude F-region
This study extends the investigation of quasi-periodic ripples in the F-region electron content reported by Birch and Hargreaves (2020a) to determine their flow velocity and wavelength, using data from the EISCAT Svalbard radars (the 42m antenna being field-aligned and the 32m scanning in a circular...
Published in: | Journal of Atmospheric and Solar-Terrestrial Physics |
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ftulancaster:oai:eprints.lancs.ac.uk:154586 2023-08-27T04:09:14+02:00 The dynamics of quasi-periodic ripples in the high-latitude F-region Birch, M.J. Hargreaves, J.K. 2021-05-31 text https://eprints.lancs.ac.uk/id/eprint/154586/ https://eprints.lancs.ac.uk/id/eprint/154586/1/2021_JASTP_1_.pdf https://doi.org/10.1016/j.jastp.2021.105536 en eng https://eprints.lancs.ac.uk/id/eprint/154586/1/2021_JASTP_1_.pdf Birch, M.J. and Hargreaves, J.K. (2021) The dynamics of quasi-periodic ripples in the high-latitude F-region. Journal of Atmospheric and Solar-Terrestrial Physics, 216. ISSN 1364-6826 cc_by_nc_nd Journal Article PeerReviewed 2021 ftulancaster https://doi.org/10.1016/j.jastp.2021.105536 2023-08-03T22:39:43Z This study extends the investigation of quasi-periodic ripples in the F-region electron content reported by Birch and Hargreaves (2020a) to determine their flow velocity and wavelength, using data from the EISCAT Svalbard radars (the 42m antenna being field-aligned and the 32m scanning in a circular pattern at a fixed angle from the field). The ripples were extracted from the 42m electron content between altitudes 213 and 389 km in the noon and midnight sectors using a bandpass filter which reduces the noise component while removing long-term trends. These ripples were found to have an average periodicity of about 21 min in the noon sector and 27 min at night. Using the 32m line-of-sight velocity data, they were also found to propagate in the noon sector at about 467 m/s in a westerly direction with a wavelength of 581 km, and in the night sector at about 283 m/s in a southerly direction with a wavelength of 454 km. The directions compare favourably with modelled plasma flows from the SuperDARN network of coherent scatter radars. Article in Journal/Newspaper EISCAT Svalbard Lancaster University: Lancaster Eprints Svalbard Journal of Atmospheric and Solar-Terrestrial Physics 216 105536 |
institution |
Open Polar |
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Lancaster University: Lancaster Eprints |
op_collection_id |
ftulancaster |
language |
English |
description |
This study extends the investigation of quasi-periodic ripples in the F-region electron content reported by Birch and Hargreaves (2020a) to determine their flow velocity and wavelength, using data from the EISCAT Svalbard radars (the 42m antenna being field-aligned and the 32m scanning in a circular pattern at a fixed angle from the field). The ripples were extracted from the 42m electron content between altitudes 213 and 389 km in the noon and midnight sectors using a bandpass filter which reduces the noise component while removing long-term trends. These ripples were found to have an average periodicity of about 21 min in the noon sector and 27 min at night. Using the 32m line-of-sight velocity data, they were also found to propagate in the noon sector at about 467 m/s in a westerly direction with a wavelength of 581 km, and in the night sector at about 283 m/s in a southerly direction with a wavelength of 454 km. The directions compare favourably with modelled plasma flows from the SuperDARN network of coherent scatter radars. |
format |
Article in Journal/Newspaper |
author |
Birch, M.J. Hargreaves, J.K. |
spellingShingle |
Birch, M.J. Hargreaves, J.K. The dynamics of quasi-periodic ripples in the high-latitude F-region |
author_facet |
Birch, M.J. Hargreaves, J.K. |
author_sort |
Birch, M.J. |
title |
The dynamics of quasi-periodic ripples in the high-latitude F-region |
title_short |
The dynamics of quasi-periodic ripples in the high-latitude F-region |
title_full |
The dynamics of quasi-periodic ripples in the high-latitude F-region |
title_fullStr |
The dynamics of quasi-periodic ripples in the high-latitude F-region |
title_full_unstemmed |
The dynamics of quasi-periodic ripples in the high-latitude F-region |
title_sort |
dynamics of quasi-periodic ripples in the high-latitude f-region |
publishDate |
2021 |
url |
https://eprints.lancs.ac.uk/id/eprint/154586/ https://eprints.lancs.ac.uk/id/eprint/154586/1/2021_JASTP_1_.pdf https://doi.org/10.1016/j.jastp.2021.105536 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_relation |
https://eprints.lancs.ac.uk/id/eprint/154586/1/2021_JASTP_1_.pdf Birch, M.J. and Hargreaves, J.K. (2021) The dynamics of quasi-periodic ripples in the high-latitude F-region. Journal of Atmospheric and Solar-Terrestrial Physics, 216. ISSN 1364-6826 |
op_rights |
cc_by_nc_nd |
op_doi |
https://doi.org/10.1016/j.jastp.2021.105536 |
container_title |
Journal of Atmospheric and Solar-Terrestrial Physics |
container_volume |
216 |
container_start_page |
105536 |
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1775350392240996352 |