North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams
International audience In the North Atlantic, there are two main western boundary currents related to the Atlantic Meridional Overturning Circulation (AMOC): the Gulf Stream flowing northward and the Deep Western Boundary Current (DWBC) flowing southward. Here we analyze data from the OVIDE section...
Published in: | Frontiers in Marine Science |
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Online Access: | https://hal.science/hal-04203250 https://hal.science/hal-04203250/document https://hal.science/hal-04203250/file/fmars-07-593757.pdf https://doi.org/10.3389/fmars.2020.593757 |
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ftunivbrest:oai:HAL:hal-04203250v1 2024-04-14T08:11:03+00:00 North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams Fontela, Marcos Pérez, Fiz F Mercier, Herle Lherminier, Pascale Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2020-11 https://hal.science/hal-04203250 https://hal.science/hal-04203250/document https://hal.science/hal-04203250/file/fmars-07-593757.pdf https://doi.org/10.3389/fmars.2020.593757 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.593757 hal-04203250 https://hal.science/hal-04203250 https://hal.science/hal-04203250/document https://hal.science/hal-04203250/file/fmars-07-593757.pdf doi:10.3389/fmars.2020.593757 info:eu-repo/semantics/OpenAccess ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-04203250 Frontiers in Marine Science, 2020, 7, 593757 (10p.). ⟨10.3389/fmars.2020.593757⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftunivbrest https://doi.org/10.3389/fmars.2020.593757 2024-03-21T16:22:40Z International audience In the North Atlantic, there are two main western boundary currents related to the Atlantic Meridional Overturning Circulation (AMOC): the Gulf Stream flowing northward and the Deep Western Boundary Current (DWBC) flowing southward. Here we analyze data from the OVIDE section (GO-SHIP A25 Portugal-Greenland 40–60°N) that crosses the DWBC and the northward extension of the Gulf Stream, the North Atlantic Current. We show that North Atlantic western boundary currents play a key role in the transport of dissolved organic matter, specifically dissolved organic carbon (DOC). Revisited transports and budgets of DOC with new available data identify the eastern Subpolar North Atlantic (eSPNA) as an important source of locally produced organic matter for the North Atlantic and a key region in the supply of bioavailable DOC to the deep ocean. The East Greenland Current, and its upstream source the East Reykjanes Ridge Current on the eastern flank of the mid-Atlantic ridge, are export pathways of bioavailable DOC toward subtropical latitudes. The fast overturning and subsequent remineralization of DOC produced in the autotrophic eSPNA explains up to 38% of the total oxygen consumption in the deep North Atlantic between the OVIDE section and 24°N. Carbon budgets that do not take into account this organic remineralization process overestimates the natural uptake of carbon dioxide (CO2) from the atmosphere by one third. The inclusion of DOC transports in regional carbon budgets reconciles the estimates of CO2 uptake in the North Atlantic between model and observations. Article in Journal/Newspaper East Greenland east greenland current Greenland north atlantic current North Atlantic Université de Bretagne Occidentale: HAL Greenland Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
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ftunivbrest |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Fontela, Marcos Pérez, Fiz F Mercier, Herle Lherminier, Pascale North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience In the North Atlantic, there are two main western boundary currents related to the Atlantic Meridional Overturning Circulation (AMOC): the Gulf Stream flowing northward and the Deep Western Boundary Current (DWBC) flowing southward. Here we analyze data from the OVIDE section (GO-SHIP A25 Portugal-Greenland 40–60°N) that crosses the DWBC and the northward extension of the Gulf Stream, the North Atlantic Current. We show that North Atlantic western boundary currents play a key role in the transport of dissolved organic matter, specifically dissolved organic carbon (DOC). Revisited transports and budgets of DOC with new available data identify the eastern Subpolar North Atlantic (eSPNA) as an important source of locally produced organic matter for the North Atlantic and a key region in the supply of bioavailable DOC to the deep ocean. The East Greenland Current, and its upstream source the East Reykjanes Ridge Current on the eastern flank of the mid-Atlantic ridge, are export pathways of bioavailable DOC toward subtropical latitudes. The fast overturning and subsequent remineralization of DOC produced in the autotrophic eSPNA explains up to 38% of the total oxygen consumption in the deep North Atlantic between the OVIDE section and 24°N. Carbon budgets that do not take into account this organic remineralization process overestimates the natural uptake of carbon dioxide (CO2) from the atmosphere by one third. The inclusion of DOC transports in regional carbon budgets reconciles the estimates of CO2 uptake in the North Atlantic between model and observations. |
author2 |
Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Fontela, Marcos Pérez, Fiz F Mercier, Herle Lherminier, Pascale |
author_facet |
Fontela, Marcos Pérez, Fiz F Mercier, Herle Lherminier, Pascale |
author_sort |
Fontela, Marcos |
title |
North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
title_short |
North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
title_full |
North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
title_fullStr |
North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
title_full_unstemmed |
North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
title_sort |
north atlantic western boundary currents are intense dissolved organic carbon streams |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-04203250 https://hal.science/hal-04203250/document https://hal.science/hal-04203250/file/fmars-07-593757.pdf https://doi.org/10.3389/fmars.2020.593757 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Greenland Mid-Atlantic Ridge Reykjanes |
geographic_facet |
Greenland Mid-Atlantic Ridge Reykjanes |
genre |
East Greenland east greenland current Greenland north atlantic current North Atlantic |
genre_facet |
East Greenland east greenland current Greenland north atlantic current North Atlantic |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-04203250 Frontiers in Marine Science, 2020, 7, 593757 (10p.). ⟨10.3389/fmars.2020.593757⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.593757 hal-04203250 https://hal.science/hal-04203250 https://hal.science/hal-04203250/document https://hal.science/hal-04203250/file/fmars-07-593757.pdf doi:10.3389/fmars.2020.593757 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fmars.2020.593757 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1796308701429104640 |