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Weaker Atlantic overturning circulation increases the vulnerability of northern Amazon forests

dc.rights.licenseopenen_US
dc.contributor.authorAKABANE, T. K.
dc.contributor.authorCHIESSI, C. M.
dc.contributor.authorHIROTA, M.
dc.contributor.authorBOUIMETARHAN, I.
dc.contributor.authorPRANGE, M.
dc.contributor.authorMULITZA, S.
dc.contributor.authorBERTASSOLI JR, D. J.
dc.contributor.authorHÄGGI, C.
dc.contributor.authorSTAAL, A.
dc.contributor.authorLOHMANN, G.
dc.contributor.authorBOERS, N.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDANIAU, Anne-Laure
IDREF: 12852538X
dc.contributor.authorOLIVEIRA, R. S.
dc.contributor.authorCAMPOS, M. C.
dc.contributor.authorSHI, X.
dc.contributor.authorDE OLIVEIRA, P. E.
dc.date.accessioned2025-04-24T08:13:04Z
dc.date.available2025-04-24T08:13:04Z
dc.date.issued2024-11-01
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/206388
dc.description.abstractEnThe Atlantic meridional overturning circulation (AMOC) and the Amazon forest are viewed as connected tipping elements in a warming climate system. If global warming exceeds a critical threshold, the AMOC may slow down substantially, changing atmospheric circulation and leading to Amazonia becoming drier in the north and wetter in the south. Yet, the impact of an AMOC slowdown on Amazon vegetation is still not well constrained. Here we use pollen and microcharcoal data from a marine sediment core to assess changes in Amazon vegetation from 25,000 to 12,500 years ago. Additionally, we model vegetation responses to an AMOC slowdown under both glacial and pre-industrial conditions. During a past AMOC slowdown (Heinrich Stadial 1–18,000 to 14,800 years ago), pollen data evidence a decline in cold- and moist-affinity elements, coupled with a rise in seasonal tropical vegetation. This pattern is consistent with the decline in suitability of northern Amazon moist forests in a model with an imposed 50% AMOC weakening under glacial conditions. Our modelling results suggest similar changes for a comparable AMOC slowdown under pre-industrial conditions. Combined with current disturbances such as deforestation and wildfires elsewhere in the basin, an AMOC slowdown may exert a systemic impact on the Amazon forest.
dc.language.isoENen_US
dc.titleWeaker Atlantic overturning circulation increases the vulnerability of northern Amazon forests
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s41561-024-01578-zen_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalNature Geoscienceen_US
bordeaux.page1284-1290en_US
bordeaux.volume17en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue12en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
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dc.rights.ccPas de Licence CCen_US
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