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...
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ftarchimer:oai:archimer.ifremer.fr:44463 2023-05-15T16:28:30+02:00 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 2016-07 application/pdf https://archimer.ifremer.fr/doc/00333/44463/44141.pdf https://doi.org/10.1175/JPO-D-15-0186.1 https://archimer.ifremer.fr/doc/00333/44463/ eng eng Amer Meteorological Soc https://archimer.ifremer.fr/doc/00333/44463/44141.pdf doi:10.1175/JPO-D-15-0186.1 https://archimer.ifremer.fr/doc/00333/44463/ 2016 American Meteorological Society info:eu-repo/semantics/openAccess restricted use Journal Of Physical Oceanography (0022-3670) (Amer Meteorological Soc), 2016-07 , Vol. 46 , N. 7 , P. 1989-2003 text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.1175/JPO-D-15-0186.1 2021-09-23T20:28:20Z 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) 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 |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Ferron, Bruno Kokoszka, Florian Mercier, Herle Lherminier, Pascale Huck, Thierry Rios, Aida Thierry, Virginie |
spellingShingle |
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. |
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 |
Amer Meteorological Soc |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00333/44463/44141.pdf https://doi.org/10.1175/JPO-D-15-0186.1 https://archimer.ifremer.fr/doc/00333/44463/ |
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 |
Journal Of Physical Oceanography (0022-3670) (Amer Meteorological Soc), 2016-07 , Vol. 46 , N. 7 , P. 1989-2003 |
op_relation |
https://archimer.ifremer.fr/doc/00333/44463/44141.pdf doi:10.1175/JPO-D-15-0186.1 https://archimer.ifremer.fr/doc/00333/44463/ |
op_rights |
2016 American Meteorological Society info:eu-repo/semantics/openAccess restricted use |
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_ |
1766018148293672960 |