Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean
International audience The propagation characteristics of near-inertial waves (NIWs) and how mesoscale and submesoscale processes affect the waves' vertical penetration are investigated using observations from a mooring array located in the northeast Atlantic. The year-long observations show th...
Published in: | Geophysical Research Letters |
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Online Access: | https://insu.hal.science/insu-03779395 https://insu.hal.science/insu-03779395/document https://insu.hal.science/insu-03779395/file/94986.pdf https://doi.org/10.1029/2022GL098522 |
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ftccsdartic:oai:HAL:insu-03779395v1 2023-12-31T10:21:08+01:00 Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean Yu, Xiaolong Naveira Garabato, Alberto C. Vic, Clément Gula, Jonathan Savage, Anna C. Wang, Jinbo Waterhouse, Amy F. Mackinnon, Jennifer A. Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Océan Dynamique Observations Analyse (ODYSSEY) Université de Bretagne Occidentale - UFR Sciences et Techniques (UBO UFR ST) Université de Brest (UBO)-Université de Brest (UBO)-Université de Rennes (UR)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Inria Rennes – Bretagne Atlantique Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) 2022 https://insu.hal.science/insu-03779395 https://insu.hal.science/insu-03779395/document https://insu.hal.science/insu-03779395/file/94986.pdf https://doi.org/10.1029/2022GL098522 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL098522 insu-03779395 https://insu.hal.science/insu-03779395 https://insu.hal.science/insu-03779395/document https://insu.hal.science/insu-03779395/file/94986.pdf BIBCODE: 2022GeoRL.4998522Y doi:10.1029/2022GL098522 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-03779395 Geophysical Research Letters, 2022, 49, ⟨10.1029/2022GL098522⟩ near-inertial waves chimney effect mesoscale motions submesoscale motions [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1029/2022GL098522 2023-12-02T23:47:50Z International audience The propagation characteristics of near-inertial waves (NIWs) and how mesoscale and submesoscale processes affect the waves' vertical penetration are investigated using observations from a mooring array located in the northeast Atlantic. The year-long observations show that near-inertial motions are mainly generated by local wind forcing, and that they radiate equatorward and downward following several strong wind events (wind stress ≳0.5 N m −2 ). Observational estimates of horizontal group speed typically exceed those of vertical group speed by two orders of magnitude, consistent with predictions from the dispersion relation. Enhanced near-inertial kinetic energy and vertical shear are found only in mesoscale anticyclones with Rossby number of O(0.1). By contrast, submesoscale motions with order one Rossby number have little effect on the trapping and vertical penetration of NIWs, due to their smaller horizontal scales, shorter time scales, and confined vertical extent compared to mesoscale eddies. Article in Journal/Newspaper Northeast Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Geophysical Research Letters 49 13 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
near-inertial waves chimney effect mesoscale motions submesoscale motions [SDU]Sciences of the Universe [physics] |
spellingShingle |
near-inertial waves chimney effect mesoscale motions submesoscale motions [SDU]Sciences of the Universe [physics] Yu, Xiaolong Naveira Garabato, Alberto C. Vic, Clément Gula, Jonathan Savage, Anna C. Wang, Jinbo Waterhouse, Amy F. Mackinnon, Jennifer A. Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
topic_facet |
near-inertial waves chimney effect mesoscale motions submesoscale motions [SDU]Sciences of the Universe [physics] |
description |
International audience The propagation characteristics of near-inertial waves (NIWs) and how mesoscale and submesoscale processes affect the waves' vertical penetration are investigated using observations from a mooring array located in the northeast Atlantic. The year-long observations show that near-inertial motions are mainly generated by local wind forcing, and that they radiate equatorward and downward following several strong wind events (wind stress ≳0.5 N m −2 ). Observational estimates of horizontal group speed typically exceed those of vertical group speed by two orders of magnitude, consistent with predictions from the dispersion relation. Enhanced near-inertial kinetic energy and vertical shear are found only in mesoscale anticyclones with Rossby number of O(0.1). By contrast, submesoscale motions with order one Rossby number have little effect on the trapping and vertical penetration of NIWs, due to their smaller horizontal scales, shorter time scales, and confined vertical extent compared to mesoscale eddies. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Océan Dynamique Observations Analyse (ODYSSEY) Université de Bretagne Occidentale - UFR Sciences et Techniques (UBO UFR ST) Université de Brest (UBO)-Université de Brest (UBO)-Université de Rennes (UR)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Inria Rennes – Bretagne Atlantique Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) |
format |
Article in Journal/Newspaper |
author |
Yu, Xiaolong Naveira Garabato, Alberto C. Vic, Clément Gula, Jonathan Savage, Anna C. Wang, Jinbo Waterhouse, Amy F. Mackinnon, Jennifer A. |
author_facet |
Yu, Xiaolong Naveira Garabato, Alberto C. Vic, Clément Gula, Jonathan Savage, Anna C. Wang, Jinbo Waterhouse, Amy F. Mackinnon, Jennifer A. |
author_sort |
Yu, Xiaolong |
title |
Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
title_short |
Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
title_full |
Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
title_fullStr |
Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
title_full_unstemmed |
Observed Equatorward Propagation and Chimney Effect of Near-Inertial Waves in the Midlatitude Ocean |
title_sort |
observed equatorward propagation and chimney effect of near-inertial waves in the midlatitude ocean |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03779395 https://insu.hal.science/insu-03779395/document https://insu.hal.science/insu-03779395/file/94986.pdf https://doi.org/10.1029/2022GL098522 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-03779395 Geophysical Research Letters, 2022, 49, ⟨10.1029/2022GL098522⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL098522 insu-03779395 https://insu.hal.science/insu-03779395 https://insu.hal.science/insu-03779395/document https://insu.hal.science/insu-03779395/file/94986.pdf BIBCODE: 2022GeoRL.4998522Y doi:10.1029/2022GL098522 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2022GL098522 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
13 |
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1786831793149706240 |