Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins
In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence, and the overall contribution of tide-driven mixing to Arctic Oc...
Published in: | Geophysical Research Letters |
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2020
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Online Access: | https://research.bangor.ac.uk/portal/en/researchoutputs/tidallyforced-lee-waves-drive-turbulent-mixing-along-the-arctic-ocean-margins(267cb9e2-a3cd-4763-b36a-e43923f526a2).html https://doi.org/10.1029/2020GL088083 https://research.bangor.ac.uk/ws/files/35185516/2020_Tidally_foreced_lee_waves.pdf |
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ftuwalesbangcris:oai:research.bangor.ac.uk:publications/267cb9e2-a3cd-4763-b36a-e43923f526a2 2023-05-15T14:24:37+02:00 Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins Fer, Ilker Koenig, Zoe Koslov, Igor Ostrowski, Marek Rippeth, Tom Padman, Laurie Bosse, Anthony Kolas, Eivind 2020-08-28 application/pdf https://research.bangor.ac.uk/portal/en/researchoutputs/tidallyforced-lee-waves-drive-turbulent-mixing-along-the-arctic-ocean-margins(267cb9e2-a3cd-4763-b36a-e43923f526a2).html https://doi.org/10.1029/2020GL088083 https://research.bangor.ac.uk/ws/files/35185516/2020_Tidally_foreced_lee_waves.pdf eng eng info:eu-repo/semantics/openAccess Fer , I , Koenig , Z , Koslov , I , Ostrowski , M , Rippeth , T , Padman , L , Bosse , A & Kolas , E 2020 , ' Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins ' , Geophysical Research Letters , vol. 47 , no. 16 , 2020GL088083R . https://doi.org/10.1029/2020GL088083 Svalbard dissipation rate Arctic Ocean ocean microstructure nonlinear waves critical flow article 2020 ftuwalesbangcris https://doi.org/10.1029/2020GL088083 2021-12-26T12:06:52Z In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence, and the overall contribution of tide-driven mixing to Arctic Ocean state, are poorly understood. We present measurements from the shelf north of Svalbard that show abrupt isopycnal vertical displacements of 10{50} m and intense dissipation associated with cross-isobath diurnal tidal currents of ~ 0:15 m/s. Energy from the barotropic tide accumulated in a trapped baroclinic lee wave during maximum downslope flow , which and was released around slack water. During a 6-h turbulent event, high frequency internal waves were present, the full 300 m depth water column became turbulent, dissipation rates increased by a factor of 100 and turbulent heat flux averaged 15 W/m2 compared with the background rate of 1 W/m2. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Svalbard Bangor University: Research Portal Arctic Arctic Ocean Svalbard Geophysical Research Letters 47 16 |
institution |
Open Polar |
collection |
Bangor University: Research Portal |
op_collection_id |
ftuwalesbangcris |
language |
English |
topic |
Svalbard dissipation rate Arctic Ocean ocean microstructure nonlinear waves critical flow |
spellingShingle |
Svalbard dissipation rate Arctic Ocean ocean microstructure nonlinear waves critical flow Fer, Ilker Koenig, Zoe Koslov, Igor Ostrowski, Marek Rippeth, Tom Padman, Laurie Bosse, Anthony Kolas, Eivind Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
topic_facet |
Svalbard dissipation rate Arctic Ocean ocean microstructure nonlinear waves critical flow |
description |
In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence, and the overall contribution of tide-driven mixing to Arctic Ocean state, are poorly understood. We present measurements from the shelf north of Svalbard that show abrupt isopycnal vertical displacements of 10{50} m and intense dissipation associated with cross-isobath diurnal tidal currents of ~ 0:15 m/s. Energy from the barotropic tide accumulated in a trapped baroclinic lee wave during maximum downslope flow , which and was released around slack water. During a 6-h turbulent event, high frequency internal waves were present, the full 300 m depth water column became turbulent, dissipation rates increased by a factor of 100 and turbulent heat flux averaged 15 W/m2 compared with the background rate of 1 W/m2. |
format |
Article in Journal/Newspaper |
author |
Fer, Ilker Koenig, Zoe Koslov, Igor Ostrowski, Marek Rippeth, Tom Padman, Laurie Bosse, Anthony Kolas, Eivind |
author_facet |
Fer, Ilker Koenig, Zoe Koslov, Igor Ostrowski, Marek Rippeth, Tom Padman, Laurie Bosse, Anthony Kolas, Eivind |
author_sort |
Fer, Ilker |
title |
Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
title_short |
Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
title_full |
Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
title_fullStr |
Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
title_full_unstemmed |
Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins |
title_sort |
tidally-forced lee waves drive turbulent mixing along the arctic ocean margins |
publishDate |
2020 |
url |
https://research.bangor.ac.uk/portal/en/researchoutputs/tidallyforced-lee-waves-drive-turbulent-mixing-along-the-arctic-ocean-margins(267cb9e2-a3cd-4763-b36a-e43923f526a2).html https://doi.org/10.1029/2020GL088083 https://research.bangor.ac.uk/ws/files/35185516/2020_Tidally_foreced_lee_waves.pdf |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Arctic Ocean Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Svalbard |
op_source |
Fer , I , Koenig , Z , Koslov , I , Ostrowski , M , Rippeth , T , Padman , L , Bosse , A & Kolas , E 2020 , ' Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins ' , Geophysical Research Letters , vol. 47 , no. 16 , 2020GL088083R . https://doi.org/10.1029/2020GL088083 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020GL088083 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
16 |
_version_ |
1766297056467484672 |