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Microscopic charcoals in ocean sediments off Africa track past fire intensity from the continent

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHALIUC, Aritina
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDANIAU, Anne-Laure
hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorMOUILLOT, Florent
hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorCHEN, Wentao
hal.structure.identifierInstitut méditerranéen de biodiversité et d'écologie marine et continentale [IMBE]
dc.contributor.authorLEYS, Bérangère
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDAVID, Valerie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
hal.structure.identifierGeo-Ocean [GEO-OCEAN]
dc.contributor.authorDENNIELOU, Bernard
hal.structure.identifierCenter for Marine Environmental Sciences [Bremen] [MARUM]
dc.contributor.authorSCHEFUSS, Enno
hal.structure.identifierGeo-Ocean [GEO-OCEAN]
dc.contributor.authorBAYON, Germain
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
dc.date.accessioned2024-02-12T10:53:01Z
dc.date.available2024-02-12T10:53:01Z
dc.date.issued2023-12
dc.identifier.issn2662-4435en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188044
dc.description.abstractEnAbstract Fires in Africa account for more than half of global fire-carbon emissions but the long-term evolution of fire activity and its link to global climate change remains elusive. Paleofire records provide descriptive information about fire changes through time, going beyond the range of satellite observations, although fire regime characteristics are challenging to reconstruct. To address this conceptual gap, we report here the abundance and morphometric data for a large set of microscopic charcoal samples ( n = 128) recovered from surface ocean sediments offshore Africa. We show that in subtropical Southern Africa, large and intense fires prevailing in open savanna-grassland ecosystems produce a high abundance of small and elongated microcharcoal particles. In contrast, in the forest ecosystems of equatorial and tropical regions of western and central Africa, low-intensity fires dominate, producing low amounts of squared microcharcoal particles. Microcharcoal concentration and morphotype in marine sediment records off Africa are thus indicative of fire regime characteristics. Applied to down-core marine charcoal records, these findings reveal that at orbital time-scale intense and large, open grassland-savanna fires occurred during wet periods in the sub-tropical areas. A strong contribution of fire carbon emissions during periods of precession and summer insolation maxima in the geological record is thus expected.
dc.description.sponsorshipReconstruction des surfaces brulées à partir des particules de microcharbon préservées dans le sédiment marin - ANR-19-CE01-0001en_US
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enMicroscopic charcoals in ocean sediments off Africa track past fire intensity from the continent
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s43247-023-00800-xen_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalCommunications Earth & Environmenten_US
bordeaux.page133en_US
bordeaux.volume4en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue1en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04082024
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Communications%20Earth%20&%20Environment&rft.date=2023-12&rft.volume=4&rft.issue=1&rft.spage=133&rft.epage=133&rft.eissn=2662-4435&rft.issn=2662-4435&rft.au=HALIUC,%20Aritina&DANIAU,%20Anne-Laure&MOUILLOT,%20Florent&CHEN,%20Wentao&LEYS,%20B%C3%A9rang%C3%A8re&rft.genre=article


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