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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ftdoajarticles:oai:doaj.org/article:b735468389954331b840c04d3b2b4fb4 2023-05-15T16:03:53+02:00 North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams Marcos Fontela Fiz F. Pérez Herlé Mercier Pascale Lherminier 2020-11-01T00:00:00Z https://doi.org/10.3389/fmars.2020.593757 https://doaj.org/article/b735468389954331b840c04d3b2b4fb4 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2020.593757/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.593757 https://doaj.org/article/b735468389954331b840c04d3b2b4fb4 Frontiers in Marine Science, Vol 7 (2020) dissolved organic carbon North Atlantic carbon budget carbon dioxide biogeochemistry Atlantic Meridional Overturning Circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.593757 2022-12-31T15:19:13Z 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 Directory of Open Access Journals: DOAJ Articles Greenland Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
dissolved organic carbon North Atlantic carbon budget carbon dioxide biogeochemistry Atlantic Meridional Overturning Circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
dissolved organic carbon North Atlantic carbon budget carbon dioxide biogeochemistry Atlantic Meridional Overturning Circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 Marcos Fontela Fiz F. Pérez Herlé Mercier Pascale Lherminier North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams |
topic_facet |
dissolved organic carbon North Atlantic carbon budget carbon dioxide biogeochemistry Atlantic Meridional Overturning Circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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°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. |
format |
Article in Journal/Newspaper |
author |
Marcos Fontela Fiz F. Pérez Herlé Mercier Pascale Lherminier |
author_facet |
Marcos Fontela Fiz F. Pérez Herlé Mercier Pascale Lherminier |
author_sort |
Marcos Fontela |
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 S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.593757 https://doaj.org/article/b735468389954331b840c04d3b2b4fb4 |
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 |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2020.593757/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.593757 https://doaj.org/article/b735468389954331b840c04d3b2b4fb4 |
op_doi |
https://doi.org/10.3389/fmars.2020.593757 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766399571898925056 |