Forcing of the overturning circulation across a circumpolar channel by internal wave breaking
The hypothesis that the impingement of mesoscale eddy flows on small-scale topography regulates diapycnal mixing and meridional overturning across the deep Southern Ocean is assessed in an idealized model. The model simulates an eddying circumpolar current coupled to a double-celled meridional overt...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2016
|
Subjects: | |
Online Access: | https://centaur.reading.ac.uk/68217/ https://centaur.reading.ac.uk/68217/1/jgrc21824.pdf https://doi.org/10.1002/2015JC011597 |
id |
ftunivreading:oai:centaur.reading.ac.uk:68217 |
---|---|
record_format |
openpolar |
spelling |
ftunivreading:oai:centaur.reading.ac.uk:68217 2024-06-23T07:56:54+00:00 Forcing of the overturning circulation across a circumpolar channel by internal wave breaking Broadbridge, Maria B. Naveira Garabato, Alberto C. Nurser, A. J. George 2016-08 text https://centaur.reading.ac.uk/68217/ https://centaur.reading.ac.uk/68217/1/jgrc21824.pdf https://doi.org/10.1002/2015JC011597 en eng American Geophysical Union https://centaur.reading.ac.uk/68217/1/jgrc21824.pdf Broadbridge, M. B. <https://centaur.reading.ac.uk/view/creators/90007510.html>, Naveira Garabato, A. C. and Nurser, A. J. G. (2016) Forcing of the overturning circulation across a circumpolar channel by internal wave breaking. Journal of Geophysical Research: Oceans, 121 (8). pp. 5436-5451. ISSN 2169-9291 doi: https://doi.org/10.1002/2015JC011597 <https://doi.org/10.1002/2015JC011597> cc_by_4 Article PeerReviewed 2016 ftunivreading https://doi.org/10.1002/2015JC011597 2024-06-11T15:05:53Z The hypothesis that the impingement of mesoscale eddy flows on small-scale topography regulates diapycnal mixing and meridional overturning across the deep Southern Ocean is assessed in an idealized model. The model simulates an eddying circumpolar current coupled to a double-celled meridional overturning with properties broadly resembling those of the Southern Ocean circulation and represents lee wave-induced diapycnal mixing using an online formulation grounded on wave radiation theory. The diapycnal mixing generated by the simulated eddy field is found to play a major role in sustaining the lower overturning cell in the model, and to underpin a significant sensitivity of this cell to wind forcing. The vertical structure of lower overturning is set by mesoscale eddies, which propagate the effects of near-bottom diapycnal mixing by displacing isopycnals vertically. Article in Journal/Newspaper Southern Ocean CentAUR: Central Archive at the University of Reading Southern Ocean Journal of Geophysical Research: Oceans 121 8 5436 5451 |
institution |
Open Polar |
collection |
CentAUR: Central Archive at the University of Reading |
op_collection_id |
ftunivreading |
language |
English |
description |
The hypothesis that the impingement of mesoscale eddy flows on small-scale topography regulates diapycnal mixing and meridional overturning across the deep Southern Ocean is assessed in an idealized model. The model simulates an eddying circumpolar current coupled to a double-celled meridional overturning with properties broadly resembling those of the Southern Ocean circulation and represents lee wave-induced diapycnal mixing using an online formulation grounded on wave radiation theory. The diapycnal mixing generated by the simulated eddy field is found to play a major role in sustaining the lower overturning cell in the model, and to underpin a significant sensitivity of this cell to wind forcing. The vertical structure of lower overturning is set by mesoscale eddies, which propagate the effects of near-bottom diapycnal mixing by displacing isopycnals vertically. |
format |
Article in Journal/Newspaper |
author |
Broadbridge, Maria B. Naveira Garabato, Alberto C. Nurser, A. J. George |
spellingShingle |
Broadbridge, Maria B. Naveira Garabato, Alberto C. Nurser, A. J. George Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
author_facet |
Broadbridge, Maria B. Naveira Garabato, Alberto C. Nurser, A. J. George |
author_sort |
Broadbridge, Maria B. |
title |
Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
title_short |
Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
title_full |
Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
title_fullStr |
Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
title_full_unstemmed |
Forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
title_sort |
forcing of the overturning circulation across a circumpolar channel by internal wave breaking |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
https://centaur.reading.ac.uk/68217/ https://centaur.reading.ac.uk/68217/1/jgrc21824.pdf https://doi.org/10.1002/2015JC011597 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://centaur.reading.ac.uk/68217/1/jgrc21824.pdf Broadbridge, M. B. <https://centaur.reading.ac.uk/view/creators/90007510.html>, Naveira Garabato, A. C. and Nurser, A. J. G. (2016) Forcing of the overturning circulation across a circumpolar channel by internal wave breaking. Journal of Geophysical Research: Oceans, 121 (8). pp. 5436-5451. ISSN 2169-9291 doi: https://doi.org/10.1002/2015JC011597 <https://doi.org/10.1002/2015JC011597> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1002/2015JC011597 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
8 |
container_start_page |
5436 |
op_container_end_page |
5451 |
_version_ |
1802650292047577088 |