Modification of turbulent dissipation rates by a deep Southern Ocean eddy
The impact of a mesoscale eddy on the magnitude and spatial distribution of diapycnal ocean mixing is investigated using a set of hydrographic and microstructure measurements collected in the Southern Ocean. These data sampled a baroclinic, mid-depth eddy formed during the disintegration of a deep b...
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ftsouthampton:oai:eprints.soton.ac.uk:376616 2023-08-27T04:12:10+02:00 Modification of turbulent dissipation rates by a deep Southern Ocean eddy Sheen, K.L. Brearley, J.A. Naveira Garabato, A.C. Smeed, D.A. St. Laurent, L. Meredith, M.P. Thurnherr, A.M. Waterman, S.N. 2015-05-16 text https://eprints.soton.ac.uk/376616/ https://eprints.soton.ac.uk/376616/1/grl52888.pdf en English eng https://eprints.soton.ac.uk/376616/1/grl52888.pdf Sheen, K.L., Brearley, J.A., Naveira Garabato, A.C., Smeed, D.A., St. Laurent, L., Meredith, M.P., Thurnherr, A.M. and Waterman, S.N. (2015) Modification of turbulent dissipation rates by a deep Southern Ocean eddy. Geophysical Research Letters, 42 (9), 3450-3457. (doi:10.1002/2015GL063216 <http://dx.doi.org/10.1002/2015GL063216>). Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1002/2015GL063216 2023-08-03T22:21:02Z The impact of a mesoscale eddy on the magnitude and spatial distribution of diapycnal ocean mixing is investigated using a set of hydrographic and microstructure measurements collected in the Southern Ocean. These data sampled a baroclinic, mid-depth eddy formed during the disintegration of a deep boundary current. Turbulent dissipation is suppressed within the eddy, but is elevated by up to an order of magnitude along the upper and lower eddy boundaries. A ray-tracing approximation is employed asa heuristic device to elucidate how the internal wave field evolves in the ambient velocity and stratification conditions accompanying the eddy. These calculations are consistent with the observations, suggesting reflection of internal wave energy from the eddy center and enhanced breaking through critical layer processes along the eddy boundaries. These results have important implications for understanding where and how internal wave energy is dissipated in the presence of energetic deep geostrophic flows. Article in Journal/Newspaper Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Geophysical Research Letters 42 9 3450 3457 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The impact of a mesoscale eddy on the magnitude and spatial distribution of diapycnal ocean mixing is investigated using a set of hydrographic and microstructure measurements collected in the Southern Ocean. These data sampled a baroclinic, mid-depth eddy formed during the disintegration of a deep boundary current. Turbulent dissipation is suppressed within the eddy, but is elevated by up to an order of magnitude along the upper and lower eddy boundaries. A ray-tracing approximation is employed asa heuristic device to elucidate how the internal wave field evolves in the ambient velocity and stratification conditions accompanying the eddy. These calculations are consistent with the observations, suggesting reflection of internal wave energy from the eddy center and enhanced breaking through critical layer processes along the eddy boundaries. These results have important implications for understanding where and how internal wave energy is dissipated in the presence of energetic deep geostrophic flows. |
format |
Article in Journal/Newspaper |
author |
Sheen, K.L. Brearley, J.A. Naveira Garabato, A.C. Smeed, D.A. St. Laurent, L. Meredith, M.P. Thurnherr, A.M. Waterman, S.N. |
spellingShingle |
Sheen, K.L. Brearley, J.A. Naveira Garabato, A.C. Smeed, D.A. St. Laurent, L. Meredith, M.P. Thurnherr, A.M. Waterman, S.N. Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
author_facet |
Sheen, K.L. Brearley, J.A. Naveira Garabato, A.C. Smeed, D.A. St. Laurent, L. Meredith, M.P. Thurnherr, A.M. Waterman, S.N. |
author_sort |
Sheen, K.L. |
title |
Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
title_short |
Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
title_full |
Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
title_fullStr |
Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
title_full_unstemmed |
Modification of turbulent dissipation rates by a deep Southern Ocean eddy |
title_sort |
modification of turbulent dissipation rates by a deep southern ocean eddy |
publishDate |
2015 |
url |
https://eprints.soton.ac.uk/376616/ https://eprints.soton.ac.uk/376616/1/grl52888.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/376616/1/grl52888.pdf Sheen, K.L., Brearley, J.A., Naveira Garabato, A.C., Smeed, D.A., St. Laurent, L., Meredith, M.P., Thurnherr, A.M. and Waterman, S.N. (2015) Modification of turbulent dissipation rates by a deep Southern Ocean eddy. Geophysical Research Letters, 42 (9), 3450-3457. (doi:10.1002/2015GL063216 <http://dx.doi.org/10.1002/2015GL063216>). |
op_doi |
https://doi.org/10.1002/2015GL063216 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
9 |
container_start_page |
3450 |
op_container_end_page |
3457 |
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1775356015824338944 |