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A two-million-year-long hydroclimatic context for hominin evolution in southeastern Africa

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCALEY, Thibaut
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEXTIER, Thomas
hal.structure.identifierGerman Research Centre for Geosciences - Helmholtz-Centre Potsdam [GFZ]
dc.contributor.authorCOLLINS, James
hal.structure.identifierCenter for Marine Environmental Sciences [Bremen] [MARUM]
dc.contributor.authorSCHEFUSS, Enno
hal.structure.identifierDepartment of Geosciences [Bremen]
hal.structure.identifierCenter for Marine Environmental Sciences [Bremen] [MARUM]
dc.contributor.authorDUPONT, Lydie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMALAIZE, Bruno
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorROSSIGNOL, Linda
hal.structure.identifierDe la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]
dc.contributor.authorSOURON, Antoine
hal.structure.identifierDepartment of Geography [UNIVERSITé DE DURHAM]
dc.contributor.authorMCCLYMONT, Erin
hal.structure.identifierJapan Agency for Marine-Earth Science and Technology [JAMSTEC]
dc.contributor.authorJIMENEZ-ESPEJO, Francisco
hal.structure.identifierOpen University of Catalonia [Barcelona]
dc.contributor.authorGARCÍA-COMAS, Carmen
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEYNAUD, Frederique
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierModélisation du climat [CLIM]
dc.contributor.authorROCHE, Didier M.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorJORRY, Stéphan
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHARLIER, Karine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorWARY, Melanie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGOURVES, Pierre Yves
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBILLY, Isabelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGIRAUDEAU, Jacques
dc.date.accessioned2024-03-18T10:27:15Z
dc.date.available2024-03-18T10:27:15Z
dc.date.issued2018-08
dc.identifier.issn0028-0836en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188832
dc.description.abstractEnThe past two million years of eastern African climate variability is currently poorly constrained, despite interest in understanding its assumed role in early human evolution. Rare palaeoclimate records from northeastern Africa suggest progressively drier conditions or a stable hydroclimate. By contrast, records from Lake Malawi in tropical southeastern Africa reveal a trend of a progressively wetter climate over the past 1.3 million years. The climatic forcings that controlled these past hydrological changes are also a matter of debate. Some studies suggest a dominant local insolation forcing on hydrological changes whereas others infer a potential influence of sea surface temperature changes in the Indian Ocean. Here we show that the hydroclimate in southeastern Africa (20–25° S) is controlled by interplay between low-latitude insolation forcing (precession and eccentricity) and changes in ice volume at high latitudes. Our results are based on a multiple-proxy reconstruction of hydrological changes in the Limpopo River catchment, combined with a reconstruction of sea surface temperature in the southwestern Indian Ocean for the past 2.14 million years. We find a long-term aridification in the Limpopo catchment between around 1 and 0.6 million years ago, opposite to the hydroclimatic evolution suggested by records from Lake Malawi. Our results, together with evidence of wetting at Lake Malawi, imply that the rainbelt contracted toward the Equator in response to increased ice volume at high latitudes. By reducing the extent of woodland or wetlands in terrestrial ecosystems, the observed changes in the hydroclimate of southeastern Africa—both in terms of its long-term state and marked precessional variability—could have had a role in the evolution of early hominins, particularly in the extinction of Paranthropus robustus.
dc.description.sponsorshipLabexMER Marine Excellence Research: a changing oceanen_US
dc.description.sponsorshipUsing the world in ancient societies : processes and forms of appropriation of space in Long Time - ANR-10-LABX-0052en_US
dc.language.isoENen_US
dc.title.enA two-million-year-long hydroclimatic context for hominin evolution in southeastern Africa
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s41586-018-0309-6en_US
dc.subject.halSciences de l'Homme et Sociétéen_US
dc.subject.halSciences de l'environnementen_US
dc.subject.halSciences de l'environnement/Milieux et Changements globauxen_US
dc.subject.halSciences de l'Homme et Société/Anthropologie biologiqueen_US
bordeaux.journalNatureen_US
bordeaux.page76 - 79en_US
bordeaux.volume560en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue7716en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifiercea-01872140
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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