Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation
Interannual variability in the volumetric water mass distribution within the North Atlantic subtropical gyre is described in relation to variability in the Atlantic Meridional Overturning Circulation. The relative roles of diabatic and adiabatic processes in the volume and heat budgets of the subtro...
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ftsouthampton:oai:eprints.soton.ac.uk:405202 2023-08-27T04:10:53+02:00 Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation Evans, Dafydd Gwyn Toole, John Forget, Gael Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George Yu, Lisan 2017-03-01 text https://eprints.soton.ac.uk/405202/ https://eprints.soton.ac.uk/405202/1/JPO_AMOC_wind_var.pdf https://eprints.soton.ac.uk/405202/2/JPO_D_16_0089.1.pdf en English eng https://eprints.soton.ac.uk/405202/1/JPO_AMOC_wind_var.pdf https://eprints.soton.ac.uk/405202/2/JPO_D_16_0089.1.pdf Evans, Dafydd Gwyn, Toole, John, Forget, Gael, Zika, Jan D., Naveira Garabato, Alberto C., Nurser, A.J. George and Yu, Lisan (2017) Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation. Journal of Physical Oceanography, 47 (3), 633–647. (doi:10.1175/JPO-D-16-0089.1 <http://dx.doi.org/10.1175/JPO-D-16-0089.1>). accepted_manuscript cc_by_nc_nd_4 Article PeerReviewed 2017 ftsouthampton https://doi.org/10.1175/JPO-D-16-0089.1 2023-08-03T22:22:06Z Interannual variability in the volumetric water mass distribution within the North Atlantic subtropical gyre is described in relation to variability in the Atlantic Meridional Overturning Circulation. The relative roles of diabatic and adiabatic processes in the volume and heat budgets of the subtropical gyre are investigated by projecting data into temperature coordinates as volumes of water using an Argo based climatology and an ocean state estimate (ECCO v4). This highlights that variations in the subtropical gyre volume budget are predominantly set by transport divergence in the gyre. A strong correlation between the volume anomaly due to transport divergence and the variability of both thermocline depth and Ekman pumping over the gyre suggests that wind-driven heave drives transport anomalies at the gyre boundaries. This wind-driven heaving contributes significantly to variations in the heat content of the gyre, as do anomalies in the air--sea fluxes. The analysis presented suggests that wind forcing plays an important role in driving interannual variability in the Atlantic meridional overturning circulation, and that this variability can be unraveled from spatially-distributed hydrographic observations using the framework presented here. Article in Journal/Newspaper North Atlantic University of Southampton: e-Prints Soton Journal of Physical Oceanography 47 3 633 647 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Interannual variability in the volumetric water mass distribution within the North Atlantic subtropical gyre is described in relation to variability in the Atlantic Meridional Overturning Circulation. The relative roles of diabatic and adiabatic processes in the volume and heat budgets of the subtropical gyre are investigated by projecting data into temperature coordinates as volumes of water using an Argo based climatology and an ocean state estimate (ECCO v4). This highlights that variations in the subtropical gyre volume budget are predominantly set by transport divergence in the gyre. A strong correlation between the volume anomaly due to transport divergence and the variability of both thermocline depth and Ekman pumping over the gyre suggests that wind-driven heave drives transport anomalies at the gyre boundaries. This wind-driven heaving contributes significantly to variations in the heat content of the gyre, as do anomalies in the air--sea fluxes. The analysis presented suggests that wind forcing plays an important role in driving interannual variability in the Atlantic meridional overturning circulation, and that this variability can be unraveled from spatially-distributed hydrographic observations using the framework presented here. |
format |
Article in Journal/Newspaper |
author |
Evans, Dafydd Gwyn Toole, John Forget, Gael Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George Yu, Lisan |
spellingShingle |
Evans, Dafydd Gwyn Toole, John Forget, Gael Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George Yu, Lisan Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
author_facet |
Evans, Dafydd Gwyn Toole, John Forget, Gael Zika, Jan D. Naveira Garabato, Alberto C. Nurser, A.J. George Yu, Lisan |
author_sort |
Evans, Dafydd Gwyn |
title |
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
title_short |
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
title_full |
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
title_fullStr |
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
title_full_unstemmed |
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation |
title_sort |
recent wind-driven variability in atlantic water mass distribution and meridional overturning circulation |
publishDate |
2017 |
url |
https://eprints.soton.ac.uk/405202/ https://eprints.soton.ac.uk/405202/1/JPO_AMOC_wind_var.pdf https://eprints.soton.ac.uk/405202/2/JPO_D_16_0089.1.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.soton.ac.uk/405202/1/JPO_AMOC_wind_var.pdf https://eprints.soton.ac.uk/405202/2/JPO_D_16_0089.1.pdf Evans, Dafydd Gwyn, Toole, John, Forget, Gael, Zika, Jan D., Naveira Garabato, Alberto C., Nurser, A.J. George and Yu, Lisan (2017) Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation. Journal of Physical Oceanography, 47 (3), 633–647. (doi:10.1175/JPO-D-16-0089.1 <http://dx.doi.org/10.1175/JPO-D-16-0089.1>). |
op_rights |
accepted_manuscript cc_by_nc_nd_4 |
op_doi |
https://doi.org/10.1175/JPO-D-16-0089.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
47 |
container_issue |
3 |
container_start_page |
633 |
op_container_end_page |
647 |
_version_ |
1775353266824019968 |