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Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBOUTTES, Nathaelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSWINGEDOUW, Didier
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.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSANCHEZ-GONI, Maria
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
dc.date.accessioned2024-03-18T09:19:50Z
dc.date.available2024-03-18T09:19:50Z
dc.date.issued2018-03-02
dc.identifier.issn1814-9324en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188827
dc.description.abstractEnAtmospheric CO2 levels during interglacials prior to the Mid-Brunhes Event (MBE,  ∼  430 ka BP) were around 40 ppm lower than after the MBE. The reasons for this difference remain unclear. A recent hypothesis proposed that changes in oceanic circulation, in response to different external forcings before and after the MBE, might have increased the ocean carbon storage in pre-MBE interglacials, thus lowering atmospheric CO2. Nevertheless, no quantitative estimate of this hypothesis has been produced up to now. Here we use an intermediate complexity model including the carbon cycle to evaluate the response of the carbon reservoirs in the atmosphere, ocean and land in response to the changes of orbital forcings, ice sheet configurations and atmospheric CO2 concentrations over the last nine interglacials. We show that the ocean takes up more carbon during pre-MBE interglacials in agreement with data, but the impact on atmospheric CO2 is limited to a few parts per million. Terrestrial biosphere is simulated to be less developed in pre-MBE interglacials, which reduces the storage of carbon on land and increases atmospheric CO2. Accounting for different simulated ice sheet extents modifies the vegetation cover and temperature, and thus the carbon reservoir distribution. Overall, atmospheric CO2 levels are lower during these pre-MBE simulated interglacials including all these effects, but the magnitude is still far too small. These results suggest a possible misrepresentation of some key processes in the model, such as the magnitude of ocean circulation changes, or the lack of crucial mechanisms or internal feedbacks, such as those related to permafrost, to fully account for the lower atmospheric CO2 concentrations during pre-MBE interglacials.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.eniLOVECLIM
dc.title.enResponse of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/cp-14-239-2018en_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnementen_US
dc.description.sponsorshipEuropeCHanges Of CO2 Levels during pAst and fuTure intErglacialsen_US
bordeaux.journalClimate of the Pasten_US
bordeaux.page239 - 253en_US
bordeaux.volume14en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01806708
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=Climate%20of%20the%20Past&rft.date=2018-03-02&rft.volume=14&rft.issue=2&rft.spage=239%20-%20253&rft.epage=239%20-%20253&rft.eissn=1814-9324&rft.issn=1814-9324&rft.au=BOUTTES,%20Nathaelle&SWINGEDOUW,%20Didier&ROCHE,%20Didier%20M.&SANCHEZ-GONI,%20Maria&CROSTA,%20Xavier&rft.genre=article


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