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Carbon and silica megasink in deep-sea sediments of the Congo terminal lobes

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierOcéan et Interfaces [OCEANIS]
dc.contributor.authorRABOUILLE, Christophe
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorDENNIELOU, B.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorBAUDIN, François
hal.structure.identifierLaboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
dc.contributor.authorRAIMONET, Mélanie
hal.structure.identifierLaboratoire Géosciences Océan [LGO]
dc.contributor.authorDROZ, L.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorKHRIPOUNOFF, A.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorMEJANELLE, L.
hal.structure.identifierHellenic Centre for Marine Research [HCMR]
dc.contributor.authorMICHALOPOULOS, P.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorPASTOR, L.
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorPRUSKI, A.M.
hal.structure.identifierLaboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
dc.contributor.authorRAGUENEAU, Olivier
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierOcéan et Interfaces [OCEANIS]
dc.contributor.authorREYSS, J.-L.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorRUFFINE, L.
hal.structure.identifierPaléoenvironnemements Paléoclimats, Bassins [ISTEP-PPB]
dc.contributor.authorSCHNYDER, J.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorSTETTEN, E.
hal.structure.identifierSchool of Earth and Atmospheric Sciences [Atlanta]
dc.contributor.authorTAILLEFERT, M.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorTOUROLLE, J.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorOLU, K.
dc.date.accessioned2024-02-27T12:23:53Z
dc.date.available2024-02-27T12:23:53Z
dc.date.issued2019-10-15
dc.identifier.issn0277-3791en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188456
dc.description.abstractEnCarbon and silicon cycles at the Earth surface are linked to long-term variations of atmospheric CO2 and oceanic primary production. In these cycles, the river-sea interface is considered a biogeochemical hotspot, and deltas presently receive and preserve a major fraction of riverine particles in shallow water sediments. In contrast, periods of glacial maximum lowstand were characterized by massive exports of sediments to the deep-sea via submarine canyons and accumulation in deep-sea fans. Here, we calculate present-day mass balances for organic carbon (OC) and amorphous silica (aSi) in the terminal lobe complex of the Congo River deep-sea fan as an analogue for glacial periods. We show that this lobe complex constitutes a megasink with the current accumulation of 18 and 35% of the OC and aSi river input, respectively. This increases the estimates of organic carbon burial by 19% in the South Atlantic Ocean in a zone representing less than 0.01% of the basin. These megasinks might have played a role in carbon trapping in oceanic sediments during glacial times.
dc.description.sponsorshipTransfert de carbone organique et fonctionnement des écosystèmes dans les lobes terminaux de l'éventail sous-marin du Congo - ANR-11-BS56-0030en_US
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nd/
dc.subject.enSedimentology-marine cores
dc.subject.enOrganic geochemistry
dc.subject.enSouth Atlantic
dc.subject.enInorganic geochemistry
dc.subject.enPresent
dc.subject.enPaleoceanography
dc.subject.enACL
dc.title.enCarbon and silica megasink in deep-sea sediments of the Congo terminal lobes
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2019.07.036en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terreen_US
dc.subject.halSciences de l'environnement/Biodiversité et Ecologieen_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
bordeaux.journalQuaternary Science Reviewsen_US
bordeaux.page105854en_US
bordeaux.volume222en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02429997
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quaternary%20Science%20Reviews&rft.date=2019-10-15&rft.volume=222&rft.spage=105854&rft.epage=105854&rft.eissn=0277-3791&rft.issn=0277-3791&rft.au=RABOUILLE,%20Christophe&DENNIELOU,%20B.&BAUDIN,%20Fran%C3%A7ois&RAIMONET,%20M%C3%A9lanie&DROZ,%20L.&rft.genre=article


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