Annual Cycle of Turbulent Dissipation Estimated from Seagliders
The rate of dissipation of turbulent kinetic energy is estimated using Seaglider observations of vertical water velocity in the midlatitude North Atlantic. This estimate is based on the large-eddy method, allowing the use of measurements of turbulent energy at large scales O(1–10 m) to diagnose the...
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2018
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Online Access: | https://research.bangor.ac.uk/portal/en/researchoutputs/annual-cycle-of-turbulent-dissipation-estimated-from-seagliders(591d4cc3-e3e9-4986-b486-86d0c4bc8f90).html https://doi.org/10.1029/2018GL079966 https://research.bangor.ac.uk/ws/files/22613257/Evans_et_al_2018_Geophysical_Research_Letters.pdf |
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ftuwalesbangcris:oai:research.bangor.ac.uk:publications/591d4cc3-e3e9-4986-b486-86d0c4bc8f90 2023-05-15T17:32:46+02:00 Annual Cycle of Turbulent Dissipation Estimated from Seagliders Evans, Dafydd Gwyn Lucas, Natasha Hemsley, Victoria Frajka-Williams, Eleanor Naveria Garabato, Alberto C. Martin, Adrian Painter, Stuart C Inall, Mark E. Palmer, Matthew R. 2018-10-16 application/pdf https://research.bangor.ac.uk/portal/en/researchoutputs/annual-cycle-of-turbulent-dissipation-estimated-from-seagliders(591d4cc3-e3e9-4986-b486-86d0c4bc8f90).html https://doi.org/10.1029/2018GL079966 https://research.bangor.ac.uk/ws/files/22613257/Evans_et_al_2018_Geophysical_Research_Letters.pdf eng eng info:eu-repo/semantics/openAccess Evans , D G , Lucas , N , Hemsley , V , Frajka-Williams , E , Naveria Garabato , A C , Martin , A , Painter , S C , Inall , M E & Palmer , M R 2018 , ' Annual Cycle of Turbulent Dissipation Estimated from Seagliders ' , Geophysical Research Letters , vol. 45 , no. 19 , 45 , pp. 10560-10569 . https://doi.org/10.1029/2018GL079966 article 2018 ftuwalesbangcris https://doi.org/10.1029/2018GL079966 2021-12-26T12:06:25Z The rate of dissipation of turbulent kinetic energy is estimated using Seaglider observations of vertical water velocity in the midlatitude North Atlantic. This estimate is based on the large-eddy method, allowing the use of measurements of turbulent energy at large scales O(1–10 m) to diagnose the rate of energy dissipated through viscous processes at scales O(1 mm). The Seaglider data considered here were obtained in a region of high stratification (1 × 10−4 < N < 1 × 10−2s−1), where previous implementations of this method fail. The large-eddy method is generalized to high-stratification by high-pass filtering vertical velocity with a cutoff dependent on the local buoyancy frequency, producing a year-long time series of dissipation rate spanning the uppermost 1,000 m with subdaily resolution. This is compared to the dissipation rate estimated from a moored 600 kHz acoustic Doppler current profiler. The variability of the Seaglider-based dissipation correlates with one-dimensional scalings of wind- and buoyancy-driven mixed-layer turbulence. Article in Journal/Newspaper North Atlantic Bangor University: Research Portal Geophysical Research Letters 45 19 |
institution |
Open Polar |
collection |
Bangor University: Research Portal |
op_collection_id |
ftuwalesbangcris |
language |
English |
description |
The rate of dissipation of turbulent kinetic energy is estimated using Seaglider observations of vertical water velocity in the midlatitude North Atlantic. This estimate is based on the large-eddy method, allowing the use of measurements of turbulent energy at large scales O(1–10 m) to diagnose the rate of energy dissipated through viscous processes at scales O(1 mm). The Seaglider data considered here were obtained in a region of high stratification (1 × 10−4 < N < 1 × 10−2s−1), where previous implementations of this method fail. The large-eddy method is generalized to high-stratification by high-pass filtering vertical velocity with a cutoff dependent on the local buoyancy frequency, producing a year-long time series of dissipation rate spanning the uppermost 1,000 m with subdaily resolution. This is compared to the dissipation rate estimated from a moored 600 kHz acoustic Doppler current profiler. The variability of the Seaglider-based dissipation correlates with one-dimensional scalings of wind- and buoyancy-driven mixed-layer turbulence. |
format |
Article in Journal/Newspaper |
author |
Evans, Dafydd Gwyn Lucas, Natasha Hemsley, Victoria Frajka-Williams, Eleanor Naveria Garabato, Alberto C. Martin, Adrian Painter, Stuart C Inall, Mark E. Palmer, Matthew R. |
spellingShingle |
Evans, Dafydd Gwyn Lucas, Natasha Hemsley, Victoria Frajka-Williams, Eleanor Naveria Garabato, Alberto C. Martin, Adrian Painter, Stuart C Inall, Mark E. Palmer, Matthew R. Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
author_facet |
Evans, Dafydd Gwyn Lucas, Natasha Hemsley, Victoria Frajka-Williams, Eleanor Naveria Garabato, Alberto C. Martin, Adrian Painter, Stuart C Inall, Mark E. Palmer, Matthew R. |
author_sort |
Evans, Dafydd Gwyn |
title |
Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
title_short |
Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
title_full |
Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
title_fullStr |
Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
title_full_unstemmed |
Annual Cycle of Turbulent Dissipation Estimated from Seagliders |
title_sort |
annual cycle of turbulent dissipation estimated from seagliders |
publishDate |
2018 |
url |
https://research.bangor.ac.uk/portal/en/researchoutputs/annual-cycle-of-turbulent-dissipation-estimated-from-seagliders(591d4cc3-e3e9-4986-b486-86d0c4bc8f90).html https://doi.org/10.1029/2018GL079966 https://research.bangor.ac.uk/ws/files/22613257/Evans_et_al_2018_Geophysical_Research_Letters.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Evans , D G , Lucas , N , Hemsley , V , Frajka-Williams , E , Naveria Garabato , A C , Martin , A , Painter , S C , Inall , M E & Palmer , M R 2018 , ' Annual Cycle of Turbulent Dissipation Estimated from Seagliders ' , Geophysical Research Letters , vol. 45 , no. 19 , 45 , pp. 10560-10569 . https://doi.org/10.1029/2018GL079966 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018GL079966 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
19 |
_version_ |
1766131035871903744 |