Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean
The meridional oceanic transports of dissolved inorganic carbon and oxygen were calculated using six transoceanic sections occupied in the South Atlantic between 11 degrees S and 30 degrees S. The total dissolved inorganic carbon (TCO2) data were interpolated onto conductivity-temperature-depth data...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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AGU (American Geophysical Union)
1998
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Online Access: | https://oceanrep.geomar.de/id/eprint/1423/ https://oceanrep.geomar.de/id/eprint/1423/1/98GB01533.pdf https://oceanrep.geomar.de/id/eprint/1423/7/Holfort_Suppl.pdf https://doi.org/10.1029/98GB01533 |
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ftoceanrep:oai:oceanrep.geomar.de:1423 2024-09-30T14:33:10+00:00 Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean Holfort, Jürgen Johnson, K. M. Schneider, B. Siedler, Gerold Wallace, Douglas W.R. 1998 text https://oceanrep.geomar.de/id/eprint/1423/ https://oceanrep.geomar.de/id/eprint/1423/1/98GB01533.pdf https://oceanrep.geomar.de/id/eprint/1423/7/Holfort_Suppl.pdf https://doi.org/10.1029/98GB01533 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/1423/1/98GB01533.pdf https://oceanrep.geomar.de/id/eprint/1423/7/Holfort_Suppl.pdf Holfort, J., Johnson, K. M., Schneider, B., Siedler, G. and Wallace, D. W. R. (1998) Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean. Open Access Global Biogeochemical Cycles, 12 (3). pp. 479-499. DOI 10.1029/98GB01533 <https://doi.org/10.1029/98GB01533>. doi:10.1029/98GB01533 info:eu-repo/semantics/openAccess Article PeerReviewed 1998 ftoceanrep https://doi.org/10.1029/98GB01533 2024-09-04T05:04:40Z The meridional oceanic transports of dissolved inorganic carbon and oxygen were calculated using six transoceanic sections occupied in the South Atlantic between 11 degrees S and 30 degrees S. The total dissolved inorganic carbon (TCO2) data were interpolated onto conductivity-temperature-depth data to obtain a high-resolution data set, and Ekman, depth-dependent and depth-independent components of the transport were estimated. Uncertainties in the depth-independent velocity distribution were reduced using an inverse model. The inorganic carbon transport between 11 degrees S and 30 degrees S was southward, decreased slightly toward the south, and was -2150 +/- 200 kmol s(-1) (-0.81 +/- 0.08 Gt C yr(-1)) at 20 degrees S. This estimate includes the contribution of net mass transport required to balance the salt transport through Bering Strait. Anthropogenic CO2 concentrations were estimated for the sections. The meridional transport of anthropogenic CO2 was northward, increased toward the north, and was 430 kmol s(-1) (0.16 Gt C yr(-1)) at 20 degrees S. The calculations imply net southward inorganic carbon transport of 2580 kmol s(-1) (1 Gt C yr(-1)) during preindustrial times. The slight contemporary convergence of inorganic carbon between 10 degrees S and 30 degrees S is balanced by storage of anthropogenic CO2 and a sea-to-air flux implying little local divergence of the organic carbon transport. During the preindustrial era, there was significant regional convergence of both inorganic carbon and oxygen, consistent with a sea-to-air gas flux driven by warming. The northward transport of anthropogenic CO2 carried by the meridional overturning circulation represents an important source for anthropogenic CO2 currently being stored within the North Atlantic Ocean. Article in Journal/Newspaper Bering Strait North Atlantic South Atlantic Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Bering Strait Global Biogeochemical Cycles 12 3 479 499 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The meridional oceanic transports of dissolved inorganic carbon and oxygen were calculated using six transoceanic sections occupied in the South Atlantic between 11 degrees S and 30 degrees S. The total dissolved inorganic carbon (TCO2) data were interpolated onto conductivity-temperature-depth data to obtain a high-resolution data set, and Ekman, depth-dependent and depth-independent components of the transport were estimated. Uncertainties in the depth-independent velocity distribution were reduced using an inverse model. The inorganic carbon transport between 11 degrees S and 30 degrees S was southward, decreased slightly toward the south, and was -2150 +/- 200 kmol s(-1) (-0.81 +/- 0.08 Gt C yr(-1)) at 20 degrees S. This estimate includes the contribution of net mass transport required to balance the salt transport through Bering Strait. Anthropogenic CO2 concentrations were estimated for the sections. The meridional transport of anthropogenic CO2 was northward, increased toward the north, and was 430 kmol s(-1) (0.16 Gt C yr(-1)) at 20 degrees S. The calculations imply net southward inorganic carbon transport of 2580 kmol s(-1) (1 Gt C yr(-1)) during preindustrial times. The slight contemporary convergence of inorganic carbon between 10 degrees S and 30 degrees S is balanced by storage of anthropogenic CO2 and a sea-to-air flux implying little local divergence of the organic carbon transport. During the preindustrial era, there was significant regional convergence of both inorganic carbon and oxygen, consistent with a sea-to-air gas flux driven by warming. The northward transport of anthropogenic CO2 carried by the meridional overturning circulation represents an important source for anthropogenic CO2 currently being stored within the North Atlantic Ocean. |
format |
Article in Journal/Newspaper |
author |
Holfort, Jürgen Johnson, K. M. Schneider, B. Siedler, Gerold Wallace, Douglas W.R. |
spellingShingle |
Holfort, Jürgen Johnson, K. M. Schneider, B. Siedler, Gerold Wallace, Douglas W.R. Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
author_facet |
Holfort, Jürgen Johnson, K. M. Schneider, B. Siedler, Gerold Wallace, Douglas W.R. |
author_sort |
Holfort, Jürgen |
title |
Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
title_short |
Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
title_full |
Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
title_fullStr |
Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
title_full_unstemmed |
Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean |
title_sort |
meridional transport of dissolved inorganic carbon in the south atlantic ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
1998 |
url |
https://oceanrep.geomar.de/id/eprint/1423/ https://oceanrep.geomar.de/id/eprint/1423/1/98GB01533.pdf https://oceanrep.geomar.de/id/eprint/1423/7/Holfort_Suppl.pdf https://doi.org/10.1029/98GB01533 |
geographic |
Bering Strait |
geographic_facet |
Bering Strait |
genre |
Bering Strait North Atlantic South Atlantic Ocean |
genre_facet |
Bering Strait North Atlantic South Atlantic Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/1423/1/98GB01533.pdf https://oceanrep.geomar.de/id/eprint/1423/7/Holfort_Suppl.pdf Holfort, J., Johnson, K. M., Schneider, B., Siedler, G. and Wallace, D. W. R. (1998) Meridional transport of dissolved inorganic carbon in the South Atlantic Ocean. Open Access Global Biogeochemical Cycles, 12 (3). pp. 479-499. DOI 10.1029/98GB01533 <https://doi.org/10.1029/98GB01533>. doi:10.1029/98GB01533 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/98GB01533 |
container_title |
Global Biogeochemical Cycles |
container_volume |
12 |
container_issue |
3 |
container_start_page |
479 |
op_container_end_page |
499 |
_version_ |
1811637153429454848 |