Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations
The subpolar North Atlantic (SPNA) is a region of high anthropogenic CO2 (Cant) storage per unit area. Although the average Cant distribution is well documented in this region, the Cant pathways towards the ocean interior remain largely unresolved. We used observations from three Argo-O2 floats span...
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Springer Science and Business Media LLC
2024
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ftarchimer:oai:archimer.ifremer.fr:99049 2024-05-12T08:05:55+00:00 Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations Asselot, Remy Carracedo, Lidia Thierry, Virginie Mercier, Herle Bajon, Raphael Pérez, Fiz F. 2024-02 application/pdf https://archimer.ifremer.fr/doc/00879/99049/108834.pdf https://archimer.ifremer.fr/doc/00879/99049/108835.pdf https://archimer.ifremer.fr/doc/00879/99049/108836.pdf https://archimer.ifremer.fr/doc/00879/99049/108837.pdf https://doi.org/10.1038/s41467-024-46074-5 https://archimer.ifremer.fr/doc/00879/99049/ eng eng Springer Science and Business Media LLC info:eu-repo/grantAgreement/EC/H2020/862626/EU//EuroSea https://archimer.ifremer.fr/doc/00879/99049/108834.pdf https://archimer.ifremer.fr/doc/00879/99049/108835.pdf https://archimer.ifremer.fr/doc/00879/99049/108836.pdf https://archimer.ifremer.fr/doc/00879/99049/108837.pdf doi:10.1038/s41467-024-46074-5 https://archimer.ifremer.fr/doc/00879/99049/ info:eu-repo/semantics/openAccess restricted use Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2024-02 , Vol. 15 , N. 1 , P. 1630 (12p.) text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.1038/s41467-024-46074-5 2024-04-17T14:00:53Z The subpolar North Atlantic (SPNA) is a region of high anthropogenic CO2 (Cant) storage per unit area. Although the average Cant distribution is well documented in this region, the Cant pathways towards the ocean interior remain largely unresolved. We used observations from three Argo-O2 floats spanning 2013-2018 within the SPNA, combined with existing neural networks and back-calculations, to determine the Cant evolution along the float pathways from a quasi-lagrangian perspective. Our results show that Cant follows a stepwise deepening along its way through the SPNA. The upper subtropical waters have a stratified Cant distribution that homogenizes within the winter mixed layer by Subpolar Mode Water formation in the Iceland Basin. In the Irminger and Labrador Basins, the high-Cant footprint (> 55 μmol kg−1) is mixed down to 1400 and 1800 dbar, respectively, by deep winter convection. As a result, the maximum Cant concentration is diluted (<45 μmol kg−1). Our study highlights the role of water mass transformation as a first-order mechanism for Cant penetration into the ocean. It also demonstrates the potential of Argo-O2 observations, combined with existing methods, to obtain reliable Cant estimates, opening ways to study the oceanic Cant content at high spatio-temporal resolution. Article in Journal/Newspaper Iceland North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Nature Communications 15 1 |
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Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The subpolar North Atlantic (SPNA) is a region of high anthropogenic CO2 (Cant) storage per unit area. Although the average Cant distribution is well documented in this region, the Cant pathways towards the ocean interior remain largely unresolved. We used observations from three Argo-O2 floats spanning 2013-2018 within the SPNA, combined with existing neural networks and back-calculations, to determine the Cant evolution along the float pathways from a quasi-lagrangian perspective. Our results show that Cant follows a stepwise deepening along its way through the SPNA. The upper subtropical waters have a stratified Cant distribution that homogenizes within the winter mixed layer by Subpolar Mode Water formation in the Iceland Basin. In the Irminger and Labrador Basins, the high-Cant footprint (> 55 μmol kg−1) is mixed down to 1400 and 1800 dbar, respectively, by deep winter convection. As a result, the maximum Cant concentration is diluted (<45 μmol kg−1). Our study highlights the role of water mass transformation as a first-order mechanism for Cant penetration into the ocean. It also demonstrates the potential of Argo-O2 observations, combined with existing methods, to obtain reliable Cant estimates, opening ways to study the oceanic Cant content at high spatio-temporal resolution. |
format |
Article in Journal/Newspaper |
author |
Asselot, Remy Carracedo, Lidia Thierry, Virginie Mercier, Herle Bajon, Raphael Pérez, Fiz F. |
spellingShingle |
Asselot, Remy Carracedo, Lidia Thierry, Virginie Mercier, Herle Bajon, Raphael Pérez, Fiz F. Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
author_facet |
Asselot, Remy Carracedo, Lidia Thierry, Virginie Mercier, Herle Bajon, Raphael Pérez, Fiz F. |
author_sort |
Asselot, Remy |
title |
Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
title_short |
Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
title_full |
Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
title_fullStr |
Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
title_full_unstemmed |
Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations |
title_sort |
anthropogenic carbon pathways towards the north atlantic interior revealed by argo-o2, neural networks and back-calculations |
publisher |
Springer Science and Business Media LLC |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00879/99049/108834.pdf https://archimer.ifremer.fr/doc/00879/99049/108835.pdf https://archimer.ifremer.fr/doc/00879/99049/108836.pdf https://archimer.ifremer.fr/doc/00879/99049/108837.pdf https://doi.org/10.1038/s41467-024-46074-5 https://archimer.ifremer.fr/doc/00879/99049/ |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2024-02 , Vol. 15 , N. 1 , P. 1630 (12p.) |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/862626/EU//EuroSea https://archimer.ifremer.fr/doc/00879/99049/108834.pdf https://archimer.ifremer.fr/doc/00879/99049/108835.pdf https://archimer.ifremer.fr/doc/00879/99049/108836.pdf https://archimer.ifremer.fr/doc/00879/99049/108837.pdf doi:10.1038/s41467-024-46074-5 https://archimer.ifremer.fr/doc/00879/99049/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41467-024-46074-5 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
_version_ |
1798848307365150720 |