Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012.
The variability of the turbulent kinetic energy dissipation due to internal waves is quantified using a finescale parameterisation applied to the A25 Greenland-Portugal transect repeated every two years from 2002 to 2012. The internal wave velocity shear and strain are estimated for each cruise at 9...
Published in: | Journal of Physical Oceanography |
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Online Access: | https://hal.science/hal-04200832 https://hal.science/hal-04200832/document https://hal.science/hal-04200832/file/phoc-jpo-d-15-0186.1.pdf https://doi.org/10.1175/JPO-D-15-0186.1 |
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ftccsdartic:oai:HAL:hal-04200832v1 2023-12-17T10:30:56+01:00 Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. Ferron, Bruno Kokoszka, Florian Mercier, Herle Lherminier, Pascale Huck, Thierry Rios, Aida Thierry, Virginie 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) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2016-07 https://hal.science/hal-04200832 https://hal.science/hal-04200832/document https://hal.science/hal-04200832/file/phoc-jpo-d-15-0186.1.pdf https://doi.org/10.1175/JPO-D-15-0186.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-15-0186.1 hal-04200832 https://hal.science/hal-04200832 https://hal.science/hal-04200832/document https://hal.science/hal-04200832/file/phoc-jpo-d-15-0186.1.pdf doi:10.1175/JPO-D-15-0186.1 info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-04200832 Journal of Physical Oceanography, 2016, 46 (7), pp.1989-2003. ⟨10.1175/JPO-D-15-0186.1⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1175/JPO-D-15-0186.1 2023-11-18T23:42:50Z The variability of the turbulent kinetic energy dissipation due to internal waves is quantified using a finescale parameterisation applied to the A25 Greenland-Portugal transect repeated every two years from 2002 to 2012. The internal wave velocity shear and strain are estimated for each cruise at 91 stations from full depth vertical profiles of density and velocity. The 2002–2012 averaged dissipation rate, <ε2002–2012>, in the upper ocean lies in the range 1–10 × 10-10 W kg-1. At depth, <ε2002–2012> is smaller than 1 × 10-10 W kg-1 except over rough topography found at the continental slopes, the Reykjanes Ridge and in a region delimited by the Azores-Biscay Rise and Eriador Seamount. There, the vertical energy flux of internal waves is preferentially oriented toward the surface and <ε2002–2012> is in the range 1–20 × 10-10 W kg-1. The interannual variability in the dissipation rates is remarkably small over the whole transect. A few strong dissipation rate events exceeding the uncertainty of the finescale parameterisation occur at depth between the Azores-Biscay Rise and Eriador Seamount. This region is also marked by mesoscale eddying flows resulting in enhanced surface energy level and enhanced bottom velocities. Estimates of the vertical energy fluxes into the internal tide and into topographic internal waves suggest that the latter are responsible for the strong dissipation events. At Eriador Seamount, both topographic internal waves and internal tide contribute with the same order of magnitude to the dissipation rate while around the Reykjanes Ridge the internal tide provides the bulk of the dissipation rate. Article in Journal/Newspaper Greenland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Eriador Seamount ENVELOPE(-25.333,-25.333,54.833,54.833) Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Journal of Physical Oceanography 46 7 1989 2003 |
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 |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Ferron, Bruno Kokoszka, Florian Mercier, Herle Lherminier, Pascale Huck, Thierry Rios, Aida Thierry, Virginie Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
The variability of the turbulent kinetic energy dissipation due to internal waves is quantified using a finescale parameterisation applied to the A25 Greenland-Portugal transect repeated every two years from 2002 to 2012. The internal wave velocity shear and strain are estimated for each cruise at 91 stations from full depth vertical profiles of density and velocity. The 2002–2012 averaged dissipation rate, <ε2002–2012>, in the upper ocean lies in the range 1–10 × 10-10 W kg-1. At depth, <ε2002–2012> is smaller than 1 × 10-10 W kg-1 except over rough topography found at the continental slopes, the Reykjanes Ridge and in a region delimited by the Azores-Biscay Rise and Eriador Seamount. There, the vertical energy flux of internal waves is preferentially oriented toward the surface and <ε2002–2012> is in the range 1–20 × 10-10 W kg-1. The interannual variability in the dissipation rates is remarkably small over the whole transect. A few strong dissipation rate events exceeding the uncertainty of the finescale parameterisation occur at depth between the Azores-Biscay Rise and Eriador Seamount. This region is also marked by mesoscale eddying flows resulting in enhanced surface energy level and enhanced bottom velocities. Estimates of the vertical energy fluxes into the internal tide and into topographic internal waves suggest that the latter are responsible for the strong dissipation events. At Eriador Seamount, both topographic internal waves and internal tide contribute with the same order of magnitude to the dissipation rate while around the Reykjanes Ridge the internal tide provides the bulk of the dissipation rate. |
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) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Ferron, Bruno Kokoszka, Florian Mercier, Herle Lherminier, Pascale Huck, Thierry Rios, Aida Thierry, Virginie |
author_facet |
Ferron, Bruno Kokoszka, Florian Mercier, Herle Lherminier, Pascale Huck, Thierry Rios, Aida Thierry, Virginie |
author_sort |
Ferron, Bruno |
title |
Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
title_short |
Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
title_full |
Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
title_fullStr |
Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
title_full_unstemmed |
Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. |
title_sort |
variability of the turbulent kinetic energy dissipation along the a25 greenland-portugal transect repeated from 2002 to 2012. |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-04200832 https://hal.science/hal-04200832/document https://hal.science/hal-04200832/file/phoc-jpo-d-15-0186.1.pdf https://doi.org/10.1175/JPO-D-15-0186.1 |
long_lat |
ENVELOPE(-25.333,-25.333,54.833,54.833) ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Eriador Seamount Greenland Reykjanes |
geographic_facet |
Eriador Seamount Greenland Reykjanes |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-04200832 Journal of Physical Oceanography, 2016, 46 (7), pp.1989-2003. ⟨10.1175/JPO-D-15-0186.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-15-0186.1 hal-04200832 https://hal.science/hal-04200832 https://hal.science/hal-04200832/document https://hal.science/hal-04200832/file/phoc-jpo-d-15-0186.1.pdf doi:10.1175/JPO-D-15-0186.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JPO-D-15-0186.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
46 |
container_issue |
7 |
container_start_page |
1989 |
op_container_end_page |
2003 |
_version_ |
1785584062924062720 |