Anthropogenic carbon accumulation in the subtropical North Atlantic
Recent data suggest the accumulation of anthropogenic carbon dioxide (?Canth) in the subtropical North Atlantic is not occurring at a steady rate throughout the water column. Carbon measurements from three transatlantic cruises along 24.5°N in 1992, 1998, and 2004 were investigated for changes in Ca...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:20249 2023-05-15T17:06:12+02:00 Anthropogenic carbon accumulation in the subtropical North Atlantic Brown, Peter J. Bakker, Dorothee C. E. Schuster, Ute Watson, Andrew J. 2010 https://ueaeprints.uea.ac.uk/id/eprint/20249/ https://doi.org/10.1029/2008JC005043 unknown Brown, Peter J., Bakker, Dorothee C. E., Schuster, Ute and Watson, Andrew J. (2010) Anthropogenic carbon accumulation in the subtropical North Atlantic. Journal of Geophysical Research C: Oceans, 115 (4). doi:10.1029/2008JC005043 Article PeerReviewed 2010 ftuniveastangl https://doi.org/10.1029/2008JC005043 2023-03-23T23:31:25Z Recent data suggest the accumulation of anthropogenic carbon dioxide (?Canth) in the subtropical North Atlantic is not occurring at a steady rate throughout the water column. Carbon measurements from three transatlantic cruises along 24.5°N in 1992, 1998, and 2004 were investigated for changes in Canth using both a back-calculation shortcut technique and extended multiple linear regression. For three time periods (1992-1998, 1998-2004, and 1992-2004) we observed spatial and vertical changes in Canth storage, along with a general increase in total concentration. In the surface layers, total dissolved inorganic carbon (TCO 2) and Canth concentrations increased in line with atmospheric CO2 levels: TCO2 +8.8 ± 0.5 µmol kg-1 for 1992-1998 and +8.6 ± 0.5 µmol kg-1 for 1998-2004 and Canth +8.0 ± 0.2 µmol kg-1 for 1992-1998 and +6.8 ± 0.3 mmol kg-1 for 1998-2004. In deeper waters, ?Canth was significantly different than zero for all depths above 5000 dbar between 1992 and 2004, while on a subdecadal timescale, significant variability was observed for ?Canth at a depth range of 800-1000 dbar. Evidence is presented for the arrival at 24.5°N at depth of freshly ventilated Labrador Sea Water from the subpolar North Atlantic between 1992 and 1998, as well as consistent smaller ?Canth signals alongside the Mid-Atlantic Ridge. This is in addition to low-level, stable increases identified in the deep eastern basin between 1992 and 2004, the first time that ?Canth has been detected and confirmed by new measurements of carbon tetrachloride and CFC-11 from 2004. These results highlight the importance of the subtropics as a site for long-term C anth storage away from the surface. Article in Journal/Newspaper Labrador Sea North Atlantic University of East Anglia: UEA Digital Repository Mid-Atlantic Ridge Journal of Geophysical Research 115 C4 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
unknown |
description |
Recent data suggest the accumulation of anthropogenic carbon dioxide (?Canth) in the subtropical North Atlantic is not occurring at a steady rate throughout the water column. Carbon measurements from three transatlantic cruises along 24.5°N in 1992, 1998, and 2004 were investigated for changes in Canth using both a back-calculation shortcut technique and extended multiple linear regression. For three time periods (1992-1998, 1998-2004, and 1992-2004) we observed spatial and vertical changes in Canth storage, along with a general increase in total concentration. In the surface layers, total dissolved inorganic carbon (TCO 2) and Canth concentrations increased in line with atmospheric CO2 levels: TCO2 +8.8 ± 0.5 µmol kg-1 for 1992-1998 and +8.6 ± 0.5 µmol kg-1 for 1998-2004 and Canth +8.0 ± 0.2 µmol kg-1 for 1992-1998 and +6.8 ± 0.3 mmol kg-1 for 1998-2004. In deeper waters, ?Canth was significantly different than zero for all depths above 5000 dbar between 1992 and 2004, while on a subdecadal timescale, significant variability was observed for ?Canth at a depth range of 800-1000 dbar. Evidence is presented for the arrival at 24.5°N at depth of freshly ventilated Labrador Sea Water from the subpolar North Atlantic between 1992 and 1998, as well as consistent smaller ?Canth signals alongside the Mid-Atlantic Ridge. This is in addition to low-level, stable increases identified in the deep eastern basin between 1992 and 2004, the first time that ?Canth has been detected and confirmed by new measurements of carbon tetrachloride and CFC-11 from 2004. These results highlight the importance of the subtropics as a site for long-term C anth storage away from the surface. |
format |
Article in Journal/Newspaper |
author |
Brown, Peter J. Bakker, Dorothee C. E. Schuster, Ute Watson, Andrew J. |
spellingShingle |
Brown, Peter J. Bakker, Dorothee C. E. Schuster, Ute Watson, Andrew J. Anthropogenic carbon accumulation in the subtropical North Atlantic |
author_facet |
Brown, Peter J. Bakker, Dorothee C. E. Schuster, Ute Watson, Andrew J. |
author_sort |
Brown, Peter J. |
title |
Anthropogenic carbon accumulation in the subtropical North Atlantic |
title_short |
Anthropogenic carbon accumulation in the subtropical North Atlantic |
title_full |
Anthropogenic carbon accumulation in the subtropical North Atlantic |
title_fullStr |
Anthropogenic carbon accumulation in the subtropical North Atlantic |
title_full_unstemmed |
Anthropogenic carbon accumulation in the subtropical North Atlantic |
title_sort |
anthropogenic carbon accumulation in the subtropical north atlantic |
publishDate |
2010 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/20249/ https://doi.org/10.1029/2008JC005043 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_relation |
Brown, Peter J., Bakker, Dorothee C. E., Schuster, Ute and Watson, Andrew J. (2010) Anthropogenic carbon accumulation in the subtropical North Atlantic. Journal of Geophysical Research C: Oceans, 115 (4). doi:10.1029/2008JC005043 |
op_doi |
https://doi.org/10.1029/2008JC005043 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
C4 |
_version_ |
1766061237305606144 |