Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean
The North Atlantic Ocean is a major sink region for atmospheric CO 2 and contributes to the storage of anthropogenic carbon (Cant). While there is general agreement that the intensity of the meridional overturning circulation (MOC) modulates uptake, transport and storage of Cant in the North Atlanti...
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ftcopernicus:oai:publications.copernicus.org:bg56326 2023-05-15T17:25:28+02:00 Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean Racapé, Virginie Zunino, Patricia Mercier, Herlé Lherminier, Pascale Bopp, Laurent Pérèz, Fiz F. Gehlen, Marion 2019-01-24 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-15-4661-2018 https://www.biogeosciences.net/15/4661/2018/ eng eng info:eu-repo/grantAgreement/EC/FP7/264879 doi:10.5194/bg-15-4661-2018 https://www.biogeosciences.net/15/4661/2018/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2019 ftcopernicus https://doi.org/10.5194/bg-15-4661-2018 2019-12-24T09:50:01Z The North Atlantic Ocean is a major sink region for atmospheric CO 2 and contributes to the storage of anthropogenic carbon (Cant). While there is general agreement that the intensity of the meridional overturning circulation (MOC) modulates uptake, transport and storage of Cant in the North Atlantic Subpolar Ocean, processes controlling their recent variability and evolution over the 21st century remain uncertain. This study investigates the relationship between transport, air–sea flux and storage rate of Cant in the North Atlantic Subpolar Ocean over the past 53 years. Its relies on the combined analysis of a multiannual in situ data set and outputs from a global biogeochemical ocean general circulation model (NEMO–PISCES) at 1∕2 ∘ spatial resolution forced by an atmospheric reanalysis. Despite an underestimation of Cant transport and an overestimation of anthropogenic air–sea CO 2 flux in the model, the interannual variability of the regional Cant storage rate and its driving processes were well simulated by the model. Analysis of the multi-decadal simulation revealed that the MOC intensity variability was the major driver of the Cant transport variability at 25 and 36 ∘ N, but not at OVIDE. At the subpolar OVIDE section, the interannual variability of Cant transport was controlled by the accumulation of Cant in the MOC upper limb. At multi-decadal timescales, long-term changes in the North Atlantic storage rate of Cant were driven by the increase in air–sea fluxes of anthropogenic CO 2 . North Atlantic Central Water played a key role for storing Cant in the upper layer of the subtropical region and for supplying Cant to Intermediate Water and North Atlantic Deep Water. The transfer of Cant from surface to deep waters occurred mainly north of the OVIDE section. Most of the Cant transferred to the deep ocean was stored in the subpolar region, while the remainder was exported to the subtropical gyre within the lower MOC. Other/Unknown Material North Atlantic Deep Water North Atlantic Copernicus Publications: E-Journals Biogeosciences 15 14 4661 4682 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The North Atlantic Ocean is a major sink region for atmospheric CO 2 and contributes to the storage of anthropogenic carbon (Cant). While there is general agreement that the intensity of the meridional overturning circulation (MOC) modulates uptake, transport and storage of Cant in the North Atlantic Subpolar Ocean, processes controlling their recent variability and evolution over the 21st century remain uncertain. This study investigates the relationship between transport, air–sea flux and storage rate of Cant in the North Atlantic Subpolar Ocean over the past 53 years. Its relies on the combined analysis of a multiannual in situ data set and outputs from a global biogeochemical ocean general circulation model (NEMO–PISCES) at 1∕2 ∘ spatial resolution forced by an atmospheric reanalysis. Despite an underestimation of Cant transport and an overestimation of anthropogenic air–sea CO 2 flux in the model, the interannual variability of the regional Cant storage rate and its driving processes were well simulated by the model. Analysis of the multi-decadal simulation revealed that the MOC intensity variability was the major driver of the Cant transport variability at 25 and 36 ∘ N, but not at OVIDE. At the subpolar OVIDE section, the interannual variability of Cant transport was controlled by the accumulation of Cant in the MOC upper limb. At multi-decadal timescales, long-term changes in the North Atlantic storage rate of Cant were driven by the increase in air–sea fluxes of anthropogenic CO 2 . North Atlantic Central Water played a key role for storing Cant in the upper layer of the subtropical region and for supplying Cant to Intermediate Water and North Atlantic Deep Water. The transfer of Cant from surface to deep waters occurred mainly north of the OVIDE section. Most of the Cant transferred to the deep ocean was stored in the subpolar region, while the remainder was exported to the subtropical gyre within the lower MOC. |
format |
Other/Unknown Material |
author |
Racapé, Virginie Zunino, Patricia Mercier, Herlé Lherminier, Pascale Bopp, Laurent Pérèz, Fiz F. Gehlen, Marion |
spellingShingle |
Racapé, Virginie Zunino, Patricia Mercier, Herlé Lherminier, Pascale Bopp, Laurent Pérèz, Fiz F. Gehlen, Marion Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
author_facet |
Racapé, Virginie Zunino, Patricia Mercier, Herlé Lherminier, Pascale Bopp, Laurent Pérèz, Fiz F. Gehlen, Marion |
author_sort |
Racapé, Virginie |
title |
Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
title_short |
Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
title_full |
Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
title_fullStr |
Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
title_full_unstemmed |
Transport and storage of anthropogenic C in the North Atlantic Subpolar Ocean |
title_sort |
transport and storage of anthropogenic c in the north atlantic subpolar ocean |
publishDate |
2019 |
url |
https://doi.org/10.5194/bg-15-4661-2018 https://www.biogeosciences.net/15/4661/2018/ |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264879 doi:10.5194/bg-15-4661-2018 https://www.biogeosciences.net/15/4661/2018/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-15-4661-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
14 |
container_start_page |
4661 |
op_container_end_page |
4682 |
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1766116899762995200 |