The sources of deep ocean infragravity waves observed in the North Atlantic Ocean
International audience Infragravity waves are long-period (25-250 s) ocean surface gravity waves generated in coastal zones through wave-wave interactions or oscillation of the breaking point. Most of the infragravity wave energy is trapped or dissipated near coastlines, but a small percentage escap...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950/document https://hal.archives-ouvertes.fr/hal-01237950/file/2014JC010657.pdf https://doi.org/10.1002/2014JC010657 |
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ftccsdartic:oai:HAL:hal-01237950v1 2023-05-15T17:29:43+02:00 The sources of deep ocean infragravity waves observed in the North Atlantic Ocean C. Crawford, W. Ballu, Valerie Bertin, Xavier Karpytchev, M. Institut de Physique du Globe de Paris (IPGP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre littoral de géophysique (CLDG) Institut du Littoral et de l'Environnement-Université de La Rochelle (ULR) 2015 https://hal.archives-ouvertes.fr/hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950/document https://hal.archives-ouvertes.fr/hal-01237950/file/2014JC010657.pdf https://doi.org/10.1002/2014JC010657 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JC010657 hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950/document https://hal.archives-ouvertes.fr/hal-01237950/file/2014JC010657.pdf doi:10.1002/2014JC010657 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-01237950 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2015, 120 (7), pp.5120-5133. ⟨10.1002/2014JC010657⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1002/2014JC010657 2021-11-28T00:10:13Z International audience Infragravity waves are long-period (25-250 s) ocean surface gravity waves generated in coastal zones through wave-wave interactions or oscillation of the breaking point. Most of the infragravity wave energy is trapped or dissipated near coastlines, but a small percentage escapes into the open oceans. The source of deep ocean infragravity waves is debated, specifically whether they come mostly from regions with strong source waves or from sites with particular morphologies/orientations. We correlate measurements of infragravity waves in the deep North Atlantic Ocean with infragravity wave generation parameters throughout the Atlantic Ocean to find the dominant sources of deep ocean infragravity wave energy in the North Atlantic Ocean. The deep ocean infragravity wave data are from a 5 year deployment of absolute pressure gauges west of the Azores islands (37°N, 35°W) and shorter data sets from seafloor tsunami gauges (DART buoys). Two main sources are identified: one off of the west coast of southern Europe and northern Africa (25°N-40°N) in northern hemisphere winter and the other off the west coast of equatorial Africa (the Gulf of Guinea) in southern hemisphere winter. These regions have relatively weak source waves and weak infragravity wave propagation paths to the main measurement site, indicating that that the site morphology/orientation dominates the creation of deep ocean infragravity waves. Both regions have also been identified as potential sources of global seismological noise, suggesting that the same mechanisms may be behind the generation of deep ocean infragravity waves and global seismological noise in the frequency band from 0.001 to 0.04 Hz. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Geophysical Research: Oceans 120 7 5120 5133 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography C. Crawford, W. Ballu, Valerie Bertin, Xavier Karpytchev, M. The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Infragravity waves are long-period (25-250 s) ocean surface gravity waves generated in coastal zones through wave-wave interactions or oscillation of the breaking point. Most of the infragravity wave energy is trapped or dissipated near coastlines, but a small percentage escapes into the open oceans. The source of deep ocean infragravity waves is debated, specifically whether they come mostly from regions with strong source waves or from sites with particular morphologies/orientations. We correlate measurements of infragravity waves in the deep North Atlantic Ocean with infragravity wave generation parameters throughout the Atlantic Ocean to find the dominant sources of deep ocean infragravity wave energy in the North Atlantic Ocean. The deep ocean infragravity wave data are from a 5 year deployment of absolute pressure gauges west of the Azores islands (37°N, 35°W) and shorter data sets from seafloor tsunami gauges (DART buoys). Two main sources are identified: one off of the west coast of southern Europe and northern Africa (25°N-40°N) in northern hemisphere winter and the other off the west coast of equatorial Africa (the Gulf of Guinea) in southern hemisphere winter. These regions have relatively weak source waves and weak infragravity wave propagation paths to the main measurement site, indicating that that the site morphology/orientation dominates the creation of deep ocean infragravity waves. Both regions have also been identified as potential sources of global seismological noise, suggesting that the same mechanisms may be behind the generation of deep ocean infragravity waves and global seismological noise in the frequency band from 0.001 to 0.04 Hz. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre littoral de géophysique (CLDG) Institut du Littoral et de l'Environnement-Université de La Rochelle (ULR) |
format |
Article in Journal/Newspaper |
author |
C. Crawford, W. Ballu, Valerie Bertin, Xavier Karpytchev, M. |
author_facet |
C. Crawford, W. Ballu, Valerie Bertin, Xavier Karpytchev, M. |
author_sort |
C. Crawford, W. |
title |
The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
title_short |
The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
title_full |
The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
title_fullStr |
The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
title_full_unstemmed |
The sources of deep ocean infragravity waves observed in the North Atlantic Ocean |
title_sort |
sources of deep ocean infragravity waves observed in the north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950/document https://hal.archives-ouvertes.fr/hal-01237950/file/2014JC010657.pdf https://doi.org/10.1002/2014JC010657 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-01237950 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2015, 120 (7), pp.5120-5133. ⟨10.1002/2014JC010657⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JC010657 hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950 https://hal.archives-ouvertes.fr/hal-01237950/document https://hal.archives-ouvertes.fr/hal-01237950/file/2014JC010657.pdf doi:10.1002/2014JC010657 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2014JC010657 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
7 |
container_start_page |
5120 |
op_container_end_page |
5133 |
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1766124496638443520 |