Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean
International audience Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL programme (2010-2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (Delta C-ant)....
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Online Access: | https://hal.science/hal-01251672 https://hal.science/hal-01251672/document https://hal.science/hal-01251672/file/bg-12-1387-2015.pdf https://doi.org/10.5194/bg-12-1387-2015 |
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ftccsdartic:oai:HAL:hal-01251672v1 2024-02-27T08:33:32+00:00 Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean Salt, Lesley A. Heuven, S. M. A. C., Van Claus, M. E. Jones, E. M. Baar, H. J. W., De CHImie Marine (CHIM) Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre for Isotope Research Groningen (CIO) University of Groningen Groningen Department of Ocean Ecosystems Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Royal Netherlands Institute for Sea Research (NIOZ) Earth and Life Sciences division (ALW) of the Netherlands Organisation for Scientific Research (NWO) 817.01.004 EU - European Commission 264879 2015 https://hal.science/hal-01251672 https://hal.science/hal-01251672/document https://hal.science/hal-01251672/file/bg-12-1387-2015.pdf https://doi.org/10.5194/bg-12-1387-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-1387-2015 hal-01251672 https://hal.science/hal-01251672 https://hal.science/hal-01251672/document https://hal.science/hal-01251672/file/bg-12-1387-2015.pdf doi:10.5194/bg-12-1387-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01251672 Biogeosciences, 2015, 12 (5), pp.1387-1401. ⟨10.5194/bg-12-1387-2015⟩ [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.5194/bg-12-1387-2015 2024-01-28T03:54:37Z International audience Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL programme (2010-2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (Delta C-ant). Application of the extended multilinear regression (eMLR) method shows that the Delta C-ant from 1994 to 2011 has largely remained confined to the upper 1000 dbar. The greatest changes occur in the upper 200 dbar in the Subantarctic Zone (SAZ), where a maximum increase of 37 mu mol kg(-1) is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C-ant, at 0.99 +/- 0.14 mu mol kg(-1) yr(-1), resulting in a maximum rate of decrease in pH of 0.0016 yr(-1). The highest rates of acidification relative to Delta C-ant, however, were found in Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW). The low buffering capacity of SAMW and AAIW combined with their relatively high rates of C-ant increase of 0.53 +/- 0.11 and 0.36 +/- 0.06 mu mol kg(-1) yr(-1), respectively, has lead to rapid acidification in the SAZ, and will continue to do so whilst simultaneously reducing the chemical buffering capacity of this significant CO2 sink. Article in Journal/Newspaper Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Biogeosciences 12 5 1387 1401 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
spellingShingle |
[SDV]Life Sciences [q-bio] [SDE]Environmental Sciences Salt, Lesley A. Heuven, S. M. A. C., Van Claus, M. E. Jones, E. M. Baar, H. J. W., De Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
topic_facet |
[SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
description |
International audience Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL programme (2010-2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (Delta C-ant). Application of the extended multilinear regression (eMLR) method shows that the Delta C-ant from 1994 to 2011 has largely remained confined to the upper 1000 dbar. The greatest changes occur in the upper 200 dbar in the Subantarctic Zone (SAZ), where a maximum increase of 37 mu mol kg(-1) is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C-ant, at 0.99 +/- 0.14 mu mol kg(-1) yr(-1), resulting in a maximum rate of decrease in pH of 0.0016 yr(-1). The highest rates of acidification relative to Delta C-ant, however, were found in Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW). The low buffering capacity of SAMW and AAIW combined with their relatively high rates of C-ant increase of 0.53 +/- 0.11 and 0.36 +/- 0.06 mu mol kg(-1) yr(-1), respectively, has lead to rapid acidification in the SAZ, and will continue to do so whilst simultaneously reducing the chemical buffering capacity of this significant CO2 sink. |
author2 |
CHImie Marine (CHIM) Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre for Isotope Research Groningen (CIO) University of Groningen Groningen Department of Ocean Ecosystems Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Royal Netherlands Institute for Sea Research (NIOZ) Earth and Life Sciences division (ALW) of the Netherlands Organisation for Scientific Research (NWO) 817.01.004 EU - European Commission 264879 |
format |
Article in Journal/Newspaper |
author |
Salt, Lesley A. Heuven, S. M. A. C., Van Claus, M. E. Jones, E. M. Baar, H. J. W., De |
author_facet |
Salt, Lesley A. Heuven, S. M. A. C., Van Claus, M. E. Jones, E. M. Baar, H. J. W., De |
author_sort |
Salt, Lesley A. |
title |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_short |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_full |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_fullStr |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_full_unstemmed |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_sort |
rapid acidification of mode and intermediate waters in the southwestern atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01251672 https://hal.science/hal-01251672/document https://hal.science/hal-01251672/file/bg-12-1387-2015.pdf https://doi.org/10.5194/bg-12-1387-2015 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01251672 Biogeosciences, 2015, 12 (5), pp.1387-1401. ⟨10.5194/bg-12-1387-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-1387-2015 hal-01251672 https://hal.science/hal-01251672 https://hal.science/hal-01251672/document https://hal.science/hal-01251672/file/bg-12-1387-2015.pdf doi:10.5194/bg-12-1387-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-12-1387-2015 |
container_title |
Biogeosciences |
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12 |
container_issue |
5 |
container_start_page |
1387 |
op_container_end_page |
1401 |
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1792046201675186176 |