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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ftmit:oai:dspace.mit.edu:1721.1/112116 2023-06-11T04:14:43+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 Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Forget, Gael 2017-10-27T17:12:03Z application/pdf http://hdl.handle.net/1721.1/112116 unknown American Meteorological Society http://dx.doi.org/10.1175/JPO-D-16-0089.1 Journal of Physical Oceanography 0022-3670 1520-0485 http://hdl.handle.net/1721.1/112116 Evans, Dafydd Gwyn et al. “Recent Wind-Driven Variability in Atlantic Water Mass Distribution and Meridional Overturning Circulation.” Journal of Physical Oceanography 47, 3 (March 2017): 633–647 © 2017 American Meteorological Society Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Meteorological Society Article http://purl.org/eprint/type/JournalArticle 2017 ftmit https://doi.org/10.1175/JPO-D-16-0089.1 2023-05-29T07:29:18Z 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 version 4). 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. National Science Foundation (U.S.) (Grant OCE-0961713) United States. National Oceanic and Atmospheric Administration (Grant NA10OAR4310135) Article in Journal/Newspaper North Atlantic DSpace@MIT (Massachusetts Institute of Technology) Journal of Physical Oceanography 47 3 633 647 |
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DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
unknown |
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 version 4). 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. National Science Foundation (U.S.) (Grant OCE-0961713) United States. National Oceanic and Atmospheric Administration (Grant NA10OAR4310135) |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Forget, Gael |
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 |
publisher |
American Meteorological Society |
publishDate |
2017 |
url |
http://hdl.handle.net/1721.1/112116 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
American Meteorological Society |
op_relation |
http://dx.doi.org/10.1175/JPO-D-16-0089.1 Journal of Physical Oceanography 0022-3670 1520-0485 http://hdl.handle.net/1721.1/112116 Evans, Dafydd Gwyn et al. “Recent Wind-Driven Variability in Atlantic Water Mass Distribution and Meridional Overturning Circulation.” Journal of Physical Oceanography 47, 3 (March 2017): 633–647 © 2017 American Meteorological Society |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
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_ |
1768370971399421952 |