South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon
The exchange of mass, heat, salt and anthropogenic carbon (Cant) between the South Atlantic, south of 24°S, and adjacent ocean basins is estimated from hydrographic data obtained during 2008–2009 using an inverse method. Transports of anthropogenic carbon are calculated across the western (Drake Pas...
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ftnerc:oai:nora.nerc.ac.uk:516235 2023-05-15T13:49:33+02:00 South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon Evans, G.R. McDonagh, E.L. King, B.A. Bryden, H.L. Bakker, D.C.E. Brown, P.J. Schuster, U. Speer, K.G. van Heuven, S.M.A.C. 2017-02 text http://nora.nerc.ac.uk/id/eprint/516235/ https://nora.nerc.ac.uk/id/eprint/516235/1/Evans%20et%20al%20%282017%29%20PiO%20Accepted.pdf https://doi.org/10.1016/j.pocean.2016.11.005 en eng https://nora.nerc.ac.uk/id/eprint/516235/1/Evans%20et%20al%20%282017%29%20PiO%20Accepted.pdf Evans, G.R.; McDonagh, E.L.; King, B.A. orcid:0000-0003-1338-3234 Bryden, H.L.; Bakker, D.C.E.; Brown, P.J. orcid:0000-0002-1152-1114 Schuster, U.; Speer, K.G.; van Heuven, S.M.A.C. 2017 South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon. Progress in Oceanography, 151. 62-82. https://doi.org/10.1016/j.pocean.2016.11.005 <https://doi.org/10.1016/j.pocean.2016.11.005> Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1016/j.pocean.2016.11.005 2023-02-04T19:44:28Z The exchange of mass, heat, salt and anthropogenic carbon (Cant) between the South Atlantic, south of 24°S, and adjacent ocean basins is estimated from hydrographic data obtained during 2008–2009 using an inverse method. Transports of anthropogenic carbon are calculated across the western (Drake Passage), eastern (30°E) and northern (24°S) boundaries. The freshwater overturning transport of 0.09 Sv is southward, consistent with an overturning circulation that exports freshwater from the North Atlantic, and consistent with a bistable Meridional Overturning Circulation (MOC), under conditions of excess freshwater perturbation. At 30°E, net eastward Antarctic Circumpolar Current (ACC) transport, south of the Subtropical Front, is compensated by a 15.9 ± 2.3 Sv westward flow along the Antarctic boundary. The region as a whole is a substantial sink for atmospheric anthropogenic carbon of 0.51 ± 0.37 Pg C yr−1, of which 0.18 ± 0.12 Pg C yr−1 accumulates and is stored within the water column. At 24°S, a 20.2 Sv meridional overturning is associated with a 0.11 Pg C yr−1 Cant overturning. The remainder is transported into the Atlantic Ocean north of 24°S (0.28 ± 0.16 Pg C yr−1) and Indian sector of Southern Ocean (1.12 ± 0.43 Pg C yr−1), having been enhanced by inflow through Drake Passage (1.07 ± 0.44 Pg C yr−1). This underlines the importance of the South Atlantic as a crucial element of the anthropogenic carbon sink in the global oceans. Article in Journal/Newspaper Antarc* Antarctic Drake Passage North Atlantic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Drake Passage Indian Progress in Oceanography 151 62 82 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The exchange of mass, heat, salt and anthropogenic carbon (Cant) between the South Atlantic, south of 24°S, and adjacent ocean basins is estimated from hydrographic data obtained during 2008–2009 using an inverse method. Transports of anthropogenic carbon are calculated across the western (Drake Passage), eastern (30°E) and northern (24°S) boundaries. The freshwater overturning transport of 0.09 Sv is southward, consistent with an overturning circulation that exports freshwater from the North Atlantic, and consistent with a bistable Meridional Overturning Circulation (MOC), under conditions of excess freshwater perturbation. At 30°E, net eastward Antarctic Circumpolar Current (ACC) transport, south of the Subtropical Front, is compensated by a 15.9 ± 2.3 Sv westward flow along the Antarctic boundary. The region as a whole is a substantial sink for atmospheric anthropogenic carbon of 0.51 ± 0.37 Pg C yr−1, of which 0.18 ± 0.12 Pg C yr−1 accumulates and is stored within the water column. At 24°S, a 20.2 Sv meridional overturning is associated with a 0.11 Pg C yr−1 Cant overturning. The remainder is transported into the Atlantic Ocean north of 24°S (0.28 ± 0.16 Pg C yr−1) and Indian sector of Southern Ocean (1.12 ± 0.43 Pg C yr−1), having been enhanced by inflow through Drake Passage (1.07 ± 0.44 Pg C yr−1). This underlines the importance of the South Atlantic as a crucial element of the anthropogenic carbon sink in the global oceans. |
format |
Article in Journal/Newspaper |
author |
Evans, G.R. McDonagh, E.L. King, B.A. Bryden, H.L. Bakker, D.C.E. Brown, P.J. Schuster, U. Speer, K.G. van Heuven, S.M.A.C. |
spellingShingle |
Evans, G.R. McDonagh, E.L. King, B.A. Bryden, H.L. Bakker, D.C.E. Brown, P.J. Schuster, U. Speer, K.G. van Heuven, S.M.A.C. South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
author_facet |
Evans, G.R. McDonagh, E.L. King, B.A. Bryden, H.L. Bakker, D.C.E. Brown, P.J. Schuster, U. Speer, K.G. van Heuven, S.M.A.C. |
author_sort |
Evans, G.R. |
title |
South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
title_short |
South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
title_full |
South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
title_fullStr |
South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
title_full_unstemmed |
South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
title_sort |
south atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/516235/ https://nora.nerc.ac.uk/id/eprint/516235/1/Evans%20et%20al%20%282017%29%20PiO%20Accepted.pdf https://doi.org/10.1016/j.pocean.2016.11.005 |
geographic |
Antarctic Southern Ocean The Antarctic Drake Passage Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Drake Passage Indian |
genre |
Antarc* Antarctic Drake Passage North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage North Atlantic Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/516235/1/Evans%20et%20al%20%282017%29%20PiO%20Accepted.pdf Evans, G.R.; McDonagh, E.L.; King, B.A. orcid:0000-0003-1338-3234 Bryden, H.L.; Bakker, D.C.E.; Brown, P.J. orcid:0000-0002-1152-1114 Schuster, U.; Speer, K.G.; van Heuven, S.M.A.C. 2017 South Atlantic interbasin exchanges of mass, heat, salt and anthropogenic carbon. Progress in Oceanography, 151. 62-82. https://doi.org/10.1016/j.pocean.2016.11.005 <https://doi.org/10.1016/j.pocean.2016.11.005> |
op_doi |
https://doi.org/10.1016/j.pocean.2016.11.005 |
container_title |
Progress in Oceanography |
container_volume |
151 |
container_start_page |
62 |
op_container_end_page |
82 |
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1766251643953741824 |