Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations
9 pages, 5 figures, 2 tables.-- Under a Creative Commons license The chemical conditions of the Argentine Basin (western South Atlantic Ocean) water masses are evaluated with measurements from eleven hydrographic cruises to detect and quantify anthropogenic and natural stressors in the ocean carbon...
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ftcsic:oai:digital.csic.es:10261/236658 2024-02-11T09:57:19+01:00 Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations Fontela, Marcos Velo, A. Gilcoto, Miguel Pérez, Fiz F. European Commission 2021 http://hdl.handle.net/10261/236658 https://doi.org/10.1016/j.scitotenv.2021.146570 https://doi.org/10.13039/501100000780 en eng Elsevier #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/820989 Publisher's version https://doi.org/10.1016/j.scitotenv.2021.146570 Sí Science of the Total Environment 779: 146570 (2021) 0048-9697 http://hdl.handle.net/10261/236658 doi:10.1016/j.scitotenv.2021.146570 1879-1026 http://dx.doi.org/10.13039/501100000780 open Ocean acidification Anthropogenic carbon Carbonate Deoxygenation Argentine basin Western South Atlantic artículo http://purl.org/coar/resource_type/c_6501 2021 ftcsic https://doi.org/10.1016/j.scitotenv.2021.14657010.13039/501100000780 2024-01-16T11:06:22Z 9 pages, 5 figures, 2 tables.-- Under a Creative Commons license The chemical conditions of the Argentine Basin (western South Atlantic Ocean) water masses are evaluated with measurements from eleven hydrographic cruises to detect and quantify anthropogenic and natural stressors in the ocean carbon system. The database covers almost half-century (1972–2019), a time-span where the mean annual atmospheric carbon dioxide concentration (CO2atm) increased from 325 to 408 ppm of volume (ppm). This increase of atmospheric CO2 (83 ppm, the 64% of the total anthropogenic signal in the atmosphere) leads to an increase in anthropogenic carbon (Cant) across all the water column and the consequent ocean acidification: a decrease in excess carbonate that is unequivocal in the upper (South Atlantic Central Water, SACW) and intermediate water masses (Sub Antarctic Mode Water, SAMW and Antarctic Intermediate Water, AAIW). For each additional ppm in CO2atm the water masses SACW, SAMW and AAIW lose excess carbonate at a rate of 0.39 ± 0.04, 0.47 ± 0.05 and 0.23 ± 0.03 μmol·kg−1·ppm−1 respectively. Modal and intermediate water masses in the Argentine Basin are very sensitive to carbon increases due low buffering capacity. The large rate of AAIW acidification is the synergic effect of carbon uptake combined with deoxygenation and increased remineralization of organic matter. If CO2 emissions follows the path of business-as-usual emissions (SSP 5.85), SACW would become undersaturated with respect to aragonite at the end of the century. The undersaturation in AAIW is virtually unavoidable For this work M. Fontela was funded by Portuguese national funds from FCT - Foundation for Science and Technology through project UIDB/Multi/04326/2020 and CEECINST/00114/2018. A. Velo and F. F. Pérez were supported by the BOCATS2 Project (PID2019-104279GB-C21) co-funded by the Spanish Government and the Fondo Europeo de Desarrollo Regional (FEDER). A. Velo, M.Gilcoto and F. F. Pérez were supported by the European Union‘s Horizon 2020 research ... Article in Journal/Newspaper Antarc* Antarctic Ocean acidification South Atlantic Ocean Digital.CSIC (Spanish National Research Council) Antarctic Argentine Science of The Total Environment 779 146570 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Ocean acidification Anthropogenic carbon Carbonate Deoxygenation Argentine basin Western South Atlantic |
spellingShingle |
Ocean acidification Anthropogenic carbon Carbonate Deoxygenation Argentine basin Western South Atlantic Fontela, Marcos Velo, A. Gilcoto, Miguel Pérez, Fiz F. Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
topic_facet |
Ocean acidification Anthropogenic carbon Carbonate Deoxygenation Argentine basin Western South Atlantic |
description |
9 pages, 5 figures, 2 tables.-- Under a Creative Commons license The chemical conditions of the Argentine Basin (western South Atlantic Ocean) water masses are evaluated with measurements from eleven hydrographic cruises to detect and quantify anthropogenic and natural stressors in the ocean carbon system. The database covers almost half-century (1972–2019), a time-span where the mean annual atmospheric carbon dioxide concentration (CO2atm) increased from 325 to 408 ppm of volume (ppm). This increase of atmospheric CO2 (83 ppm, the 64% of the total anthropogenic signal in the atmosphere) leads to an increase in anthropogenic carbon (Cant) across all the water column and the consequent ocean acidification: a decrease in excess carbonate that is unequivocal in the upper (South Atlantic Central Water, SACW) and intermediate water masses (Sub Antarctic Mode Water, SAMW and Antarctic Intermediate Water, AAIW). For each additional ppm in CO2atm the water masses SACW, SAMW and AAIW lose excess carbonate at a rate of 0.39 ± 0.04, 0.47 ± 0.05 and 0.23 ± 0.03 μmol·kg−1·ppm−1 respectively. Modal and intermediate water masses in the Argentine Basin are very sensitive to carbon increases due low buffering capacity. The large rate of AAIW acidification is the synergic effect of carbon uptake combined with deoxygenation and increased remineralization of organic matter. If CO2 emissions follows the path of business-as-usual emissions (SSP 5.85), SACW would become undersaturated with respect to aragonite at the end of the century. The undersaturation in AAIW is virtually unavoidable For this work M. Fontela was funded by Portuguese national funds from FCT - Foundation for Science and Technology through project UIDB/Multi/04326/2020 and CEECINST/00114/2018. A. Velo and F. F. Pérez were supported by the BOCATS2 Project (PID2019-104279GB-C21) co-funded by the Spanish Government and the Fondo Europeo de Desarrollo Regional (FEDER). A. Velo, M.Gilcoto and F. F. Pérez were supported by the European Union‘s Horizon 2020 research ... |
author2 |
European Commission |
format |
Article in Journal/Newspaper |
author |
Fontela, Marcos Velo, A. Gilcoto, Miguel Pérez, Fiz F. |
author_facet |
Fontela, Marcos Velo, A. Gilcoto, Miguel Pérez, Fiz F. |
author_sort |
Fontela, Marcos |
title |
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
title_short |
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
title_full |
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
title_fullStr |
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
title_full_unstemmed |
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations |
title_sort |
anthropogenic co2 and ocean acidification in argentine basin water masses over almost five decades of observations |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/236658 https://doi.org/10.1016/j.scitotenv.2021.146570 https://doi.org/10.13039/501100000780 |
geographic |
Antarctic Argentine |
geographic_facet |
Antarctic Argentine |
genre |
Antarc* Antarctic Ocean acidification South Atlantic Ocean |
genre_facet |
Antarc* Antarctic Ocean acidification South Atlantic Ocean |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/820989 Publisher's version https://doi.org/10.1016/j.scitotenv.2021.146570 Sí Science of the Total Environment 779: 146570 (2021) 0048-9697 http://hdl.handle.net/10261/236658 doi:10.1016/j.scitotenv.2021.146570 1879-1026 http://dx.doi.org/10.13039/501100000780 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.14657010.13039/501100000780 |
container_title |
Science of The Total Environment |
container_volume |
779 |
container_start_page |
146570 |
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1790609613660356608 |