Detecting overlapping gravity waves using the S-Transform
We discuss an adaptation to the widely-used Stockwell Transform based method for the detection of gravity waves to allow the detection of multiple overlapping waves. This adjusted method is applied to data from the High Resolution Dynamics Limb Sounder for the period of May 2006 and is found to chan...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1002/grl.50378 http://n2t.net/ark:/85065/d73j3ds0 |
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ftncar:oai:drupal-site.org:articles_12620 2023-05-15T13:40:28+02:00 Detecting overlapping gravity waves using the S-Transform Wright, Corwin (Corwin J. Wright) (authoraut) Gille, John (John C. Gille) (authoraut) application/pdf https://doi.org/10.1002/grl.50378 http://n2t.net/ark:/85065/d73j3ds0 en eng American Geophysical Union Geophysical Research Letters http://dx.doi.org/10.1002/grl.50378 articles:12620 uri: http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-018-832 doi:10.1002/grl.50378 ark:/85065/d73j3ds0 http://n2t.net/ark:/85065/d73j3ds0 Copyright 2013 American Geophysical Union. Text article ftncar https://doi.org/10.1002/grl.50378 2022-08-09T18:12:37Z We discuss an adaptation to the widely-used Stockwell Transform based method for the detection of gravity waves to allow the detection of multiple overlapping waves. This adjusted method is applied to data from the High Resolution Dynamics Limb Sounder for the period of May 2006 and is found to change the measured distribution of gravity wave momentum flux on a global scale. An overall 68% increase in measured momentum flux is observed for the 20-30km altitude range, with significant regional variability. The largest absolute increase is over India, the Southern Ocean, and the Antarctic Peninsula, regions previously known to exhibit high levels of momentum flux. A strong relative increase is observed north of the equator, particularly in the tropics; analysis of the wavelength distribution of detected gravity waves shows that the majority of this increase is due to the detection of small vertical- and horizontal-scale waves which were presumably previously masked by higher-amplitude events in the same profile. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Antarctic Peninsula Southern Ocean The Antarctic Geophysical Research Letters 40 9 1850 1855 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We discuss an adaptation to the widely-used Stockwell Transform based method for the detection of gravity waves to allow the detection of multiple overlapping waves. This adjusted method is applied to data from the High Resolution Dynamics Limb Sounder for the period of May 2006 and is found to change the measured distribution of gravity wave momentum flux on a global scale. An overall 68% increase in measured momentum flux is observed for the 20-30km altitude range, with significant regional variability. The largest absolute increase is over India, the Southern Ocean, and the Antarctic Peninsula, regions previously known to exhibit high levels of momentum flux. A strong relative increase is observed north of the equator, particularly in the tropics; analysis of the wavelength distribution of detected gravity waves shows that the majority of this increase is due to the detection of small vertical- and horizontal-scale waves which were presumably previously masked by higher-amplitude events in the same profile. |
author2 |
Wright, Corwin (Corwin J. Wright) (authoraut) Gille, John (John C. Gille) (authoraut) |
format |
Article in Journal/Newspaper |
title |
Detecting overlapping gravity waves using the S-Transform |
spellingShingle |
Detecting overlapping gravity waves using the S-Transform |
title_short |
Detecting overlapping gravity waves using the S-Transform |
title_full |
Detecting overlapping gravity waves using the S-Transform |
title_fullStr |
Detecting overlapping gravity waves using the S-Transform |
title_full_unstemmed |
Detecting overlapping gravity waves using the S-Transform |
title_sort |
detecting overlapping gravity waves using the s-transform |
publisher |
American Geophysical Union |
url |
https://doi.org/10.1002/grl.50378 http://n2t.net/ark:/85065/d73j3ds0 |
geographic |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
op_relation |
Geophysical Research Letters http://dx.doi.org/10.1002/grl.50378 articles:12620 uri: http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-018-832 doi:10.1002/grl.50378 ark:/85065/d73j3ds0 http://n2t.net/ark:/85065/d73j3ds0 |
op_rights |
Copyright 2013 American Geophysical Union. |
op_doi |
https://doi.org/10.1002/grl.50378 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
9 |
container_start_page |
1850 |
op_container_end_page |
1855 |
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1766135908423172096 |