The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage
Seasonal changes in water mass properties are discussed in thermohaline coordinates from a seasonal climatology and repeat hydrographic sections. The SR1b CTD transects along Drake Passage are used as a case study. The amount of water within temperature and salinity classes and changes therein are u...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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Online Access: | https://eprints.soton.ac.uk/372139/ https://eprints.soton.ac.uk/372139/1/jgrc20971.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:372139 2023-08-27T04:04:35+02:00 The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage Evans, Dafydd Gwyn Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George 2014-11 text https://eprints.soton.ac.uk/372139/ https://eprints.soton.ac.uk/372139/1/jgrc20971.pdf en English eng https://eprints.soton.ac.uk/372139/1/jgrc20971.pdf Evans, Dafydd Gwyn, Zika, Jan D., Naveira Garabato, Alberto C. and Nurser, A.J. George (2014) The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage. Journal of Geophysical Research, 119 (11), 7987-8010. (doi:10.1002/2014JC010097 <http://dx.doi.org/10.1002/2014JC010097>). other Article PeerReviewed 2014 ftsouthampton https://doi.org/10.1002/2014JC010097 2023-08-03T22:20:53Z Seasonal changes in water mass properties are discussed in thermohaline coordinates from a seasonal climatology and repeat hydrographic sections. The SR1b CTD transects along Drake Passage are used as a case study. The amount of water within temperature and salinity classes and changes therein are used to estimate dia-thermal and dia-haline transformations. These transformations are considered in combination with climatologies of surface buoyancy flux to determine the relative contributions of surface buoyancy fluxes and subsurface mixing to changes in the distribution of water in thermohaline coordinates. The framework developed provides unique insights into the thermohaline circulation of the water masses that are present within Drake Passage, including the erosion of Antarctic Winter Water (AAWW) during the summer months and the interaction between the Circumpolar Deep Waters (CDW) and Antarctic Intermediate Water (AAIW). The results presented are consistent with summertime wind-driven inflation of the CDW layer and deflation of the AAIW layer, and with new AAIW produced in the winter as a mixture of CDW, remnant AAWW, and surface waters. This analysis therefore highlights the role of surface buoyancy fluxes in the Southern Ocean overturning. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean University of Southampton: e-Prints Soton Antarctic Southern Ocean Drake Passage Journal of Geophysical Research: Oceans 119 11 7987 8010 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Seasonal changes in water mass properties are discussed in thermohaline coordinates from a seasonal climatology and repeat hydrographic sections. The SR1b CTD transects along Drake Passage are used as a case study. The amount of water within temperature and salinity classes and changes therein are used to estimate dia-thermal and dia-haline transformations. These transformations are considered in combination with climatologies of surface buoyancy flux to determine the relative contributions of surface buoyancy fluxes and subsurface mixing to changes in the distribution of water in thermohaline coordinates. The framework developed provides unique insights into the thermohaline circulation of the water masses that are present within Drake Passage, including the erosion of Antarctic Winter Water (AAWW) during the summer months and the interaction between the Circumpolar Deep Waters (CDW) and Antarctic Intermediate Water (AAIW). The results presented are consistent with summertime wind-driven inflation of the CDW layer and deflation of the AAIW layer, and with new AAIW produced in the winter as a mixture of CDW, remnant AAWW, and surface waters. This analysis therefore highlights the role of surface buoyancy fluxes in the Southern Ocean overturning. |
format |
Article in Journal/Newspaper |
author |
Evans, Dafydd Gwyn Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George |
spellingShingle |
Evans, Dafydd Gwyn Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
author_facet |
Evans, Dafydd Gwyn Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George |
author_sort |
Evans, Dafydd Gwyn |
title |
The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
title_short |
The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
title_full |
The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
title_fullStr |
The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
title_full_unstemmed |
The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage |
title_sort |
imprint of southern ocean overturning on seasonal water mass variability in drake passage |
publishDate |
2014 |
url |
https://eprints.soton.ac.uk/372139/ https://eprints.soton.ac.uk/372139/1/jgrc20971.pdf |
geographic |
Antarctic Southern Ocean Drake Passage |
geographic_facet |
Antarctic Southern Ocean Drake Passage |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/372139/1/jgrc20971.pdf Evans, Dafydd Gwyn, Zika, Jan D., Naveira Garabato, Alberto C. and Nurser, A.J. George (2014) The imprint of Southern Ocean overturning on seasonal water mass variability in Drake Passage. Journal of Geophysical Research, 119 (11), 7987-8010. (doi:10.1002/2014JC010097 <http://dx.doi.org/10.1002/2014JC010097>). |
op_rights |
other |
op_doi |
https://doi.org/10.1002/2014JC010097 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
11 |
container_start_page |
7987 |
op_container_end_page |
8010 |
_version_ |
1775352285412458496 |