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North Atlantic western boundary currents are intense dissolved organic carbon streams

2020Journal article Open access
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dc.contributor.authorFontela, Marcos
dc.contributor.authorPérez, Fiz F.
dc.contributor.authorMercier, Herlé
dc.contributor.authorLherminier, Pascale
dc.date.accessioned2021-01-13T09:50:18Z
dc.date.available2021-01-13T09:50:18Z
dc.date.issued2020
dc.description.abstractIn 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.pt_PT
dc.description.sponsorshipFCT: UID/Multi/04326/2019/ CEECINST/00114/2018.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fmars.2020.593757pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.1/14953
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.relationOur common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectNorth Atlanticpt_PT
dc.subjectAtlantic meridional overturning circulationpt_PT
dc.subjectDissolved organic carbonpt_PT
dc.subjectCarbon budgetpt_PT
dc.subjectBiogeochemistrypt_PT
dc.subjectCarbon dioxidept_PT
dc.titleNorth Atlantic western boundary currents are intense dissolved organic carbon streamspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleOur common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/820989/EU
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume7pt_PT
oaire.fundingStreamH2020
person.familyNameMorente Fontela
person.givenNameMarcos
person.identifiers21hYoYAAAAJ&hl
person.identifier.ciencia-idF312-A970-8A93
person.identifier.orcid0000-0002-7486-0922
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationae5042ff-ec36-4de3-a262-0e448c0bf0d9
relation.isAuthorOfPublication.latestForDiscoveryae5042ff-ec36-4de3-a262-0e448c0bf0d9
relation.isProjectOfPublicationab67e6fa-87a6-47e6-9e7d-8eeb6cf1ac43
relation.isProjectOfPublication.latestForDiscoveryab67e6fa-87a6-47e6-9e7d-8eeb6cf1ac43

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