Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars

Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars

<p>This study uses hourly meteor wind measurements from a longitudinal array of 10 high-latitude SuperDARN high-frequency (HF) radars to isolate the migrating diurnal, semidiurnal, and terdiurnal tides at mesosphere–lower-thermosphere (MLT) altitudes. The planetary-scale array of radars covers...

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Main Authors: W. E. van Caspel, P. J. Espy, R. E. Hibbins, J. P. McCormack
Format: Article
Language:English
Published: Copernicus Publications 2020-12-01
Series:Annales Geophysicae
Online Access:https://angeo.copernicus.org/articles/38/1257/2020/angeo-38-1257-2020.pdf
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spelling doaj-42a77496b5bc4cffa4c22c594ee5ee4b2020-12-21T07:26:11ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762020-12-01381257126510.5194/angeo-38-1257-2020Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radarsW. E. van Caspel0W. E. van Caspel1P. J. Espy2P. J. Espy3R. E. Hibbins4R. E. Hibbins5J. P. McCormack6Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, NorwayBirkeland Centre for Space Science, Bergen, NorwayDepartment of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, NorwayBirkeland Centre for Space Science, Bergen, NorwayDepartment of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, NorwayBirkeland Centre for Space Science, Bergen, NorwaySpace Science Division, Naval Research Laboratory, Washington DC, USA<p>This study uses hourly meteor wind measurements from a longitudinal array of 10 high-latitude SuperDARN high-frequency (HF) radars to isolate the migrating diurnal, semidiurnal, and terdiurnal tides at mesosphere–lower-thermosphere (MLT) altitudes. The planetary-scale array of radars covers 180<span class="inline-formula"><sup>∘</sup></span> of longitude, with 8 out of 10 radars being in near-continuous operation since the year 2000. Time series spanning 16 years of tidal amplitudes and phases in both zonal and meridional wind are presented, along with their respective annual climatologies. The method to isolate the migrating tides from SuperDARN meteor winds is validated using 2 years of winds from a high-altitude meteorological analysis system. The validation steps demonstrate that, given the geographical spread of the radar stations, the derived tidal modes are most closely representative of the migrating tides at 60<span class="inline-formula"><sup>∘</sup></span> N. Some of the main characteristics of the observed migrating tides are that the semidiurnal tide shows sharp phase jumps around the equinoxes and peak amplitudes during early fall and that the terdiurnal tide shows a pronounced secondary amplitude peak around day of year (DOY) 265. In addition, the diurnal tide is found to show a bi-modal circular polarization phase relation between summer and winter.</p>https://angeo.copernicus.org/articles/38/1257/2020/angeo-38-1257-2020.pdf
collection DOAJ
language English
format Article
sources DOAJ
author W. E. van Caspel
W. E. van Caspel
P. J. Espy
P. J. Espy
R. E. Hibbins
R. E. Hibbins
J. P. McCormack
spellingShingle W. E. van Caspel
W. E. van Caspel
P. J. Espy
P. J. Espy
R. E. Hibbins
R. E. Hibbins
J. P. McCormack
Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
Annales Geophysicae
author_facet W. E. van Caspel
W. E. van Caspel
P. J. Espy
P. J. Espy
R. E. Hibbins
R. E. Hibbins
J. P. McCormack
author_sort W. E. van Caspel
title Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
title_short Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
title_full Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
title_fullStr Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
title_full_unstemmed Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
title_sort migrating tide climatologies measured by a high-latitude array of superdarn hf radars
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2020-12-01
description <p>This study uses hourly meteor wind measurements from a longitudinal array of 10 high-latitude SuperDARN high-frequency (HF) radars to isolate the migrating diurnal, semidiurnal, and terdiurnal tides at mesosphere–lower-thermosphere (MLT) altitudes. The planetary-scale array of radars covers 180<span class="inline-formula"><sup>∘</sup></span> of longitude, with 8 out of 10 radars being in near-continuous operation since the year 2000. Time series spanning 16 years of tidal amplitudes and phases in both zonal and meridional wind are presented, along with their respective annual climatologies. The method to isolate the migrating tides from SuperDARN meteor winds is validated using 2 years of winds from a high-altitude meteorological analysis system. The validation steps demonstrate that, given the geographical spread of the radar stations, the derived tidal modes are most closely representative of the migrating tides at 60<span class="inline-formula"><sup>∘</sup></span> N. Some of the main characteristics of the observed migrating tides are that the semidiurnal tide shows sharp phase jumps around the equinoxes and peak amplitudes during early fall and that the terdiurnal tide shows a pronounced secondary amplitude peak around day of year (DOY) 265. In addition, the diurnal tide is found to show a bi-modal circular polarization phase relation between summer and winter.</p>
url https://angeo.copernicus.org/articles/38/1257/2020/angeo-38-1257-2020.pdf
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