North Atlantic western boundary currents are intense dissolved organic carbon streams
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-G...
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/14953 2023-05-15T16:03:54+02:00 North Atlantic western boundary currents are intense dissolved organic carbon streams Fontela, Marcos Pérez, Fiz F. Mercier, Herlé Lherminier, Pascale 2020 http://hdl.handle.net/10400.1/14953 https://doi.org/10.3389/fmars.2020.593757 eng eng Frontiers Media info:eu-repo/grantAgreement/EC/H2020/820989/EU http://hdl.handle.net/10400.1/14953 doi:10.3389/fmars.2020.593757 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY North Atlantic Atlantic meridional overturning circulation Dissolved organic carbon Carbon budget Biogeochemistry Carbon dioxide article 2020 ftunivalgarve https://doi.org/10.3389/fmars.2020.593757 2022-05-30T08:49:27Z 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 degrees 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 degrees 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. FCT: UID/Multi/04326/2019/ CEECINST/00114/2018. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper East Greenland east greenland current Greenland north atlantic current North Atlantic Universidade do Algarve: Sapienta Greenland Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
North Atlantic Atlantic meridional overturning circulation Dissolved organic carbon Carbon budget Biogeochemistry Carbon dioxide |
spellingShingle |
North Atlantic Atlantic meridional overturning circulation Dissolved organic carbon Carbon budget Biogeochemistry Carbon dioxide Fontela, Marcos Pérez, Fiz F. Mercier, Herlé Lherminier, Pascale North Atlantic western boundary currents are intense dissolved organic carbon streams |
topic_facet |
North Atlantic Atlantic meridional overturning circulation Dissolved organic carbon Carbon budget Biogeochemistry Carbon dioxide |
description |
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 degrees 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 degrees 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. FCT: UID/Multi/04326/2019/ CEECINST/00114/2018. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Fontela, Marcos Pérez, Fiz F. Mercier, Herlé Lherminier, Pascale |
author_facet |
Fontela, Marcos Pérez, Fiz F. Mercier, Herlé 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 |
Frontiers Media |
publishDate |
2020 |
url |
http://hdl.handle.net/10400.1/14953 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_relation |
info:eu-repo/grantAgreement/EC/H2020/820989/EU http://hdl.handle.net/10400.1/14953 doi:10.3389/fmars.2020.593757 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2020.593757 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766399588729618432 |