SANCHEZ GONI, Maria Fernanda; EXTIER, Thomas; POLANCO-MARTÍNEZ, Josué M.; ZORZI, Coralie; RODRIGUES, Teresa; BAHR, André

doi:10.1038/s41467-023-38337-4

SANCHEZ GONI, Maria Fernanda
Environnements et Paléoenvironnements OCéaniques [EPOC]

EXTIER, Thomas
Environnements et Paléoenvironnements OCéaniques [EPOC]

POLANCO-MARTÍNEZ, Josué M.

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Ce document a été publié dans

Nature Communications. 2023-05-10, vol. 14, n° 1

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AbstractThe end of the Middle Pleistocene Transition (MPT, ~ 800-670 thousand years before present, ka) was characterised by the emergence of large glacial ice-sheets associated with anomalously warm North Atlantic sea surface temperatures enhancing moisture production. Still, the direction and intensity of moisture transport across Eurasia towards potential ice-sheets is poorly constrained. To reconstruct late MPT moisture production and dispersal, we combine records of upper ocean temperature and pollen-based Mediterranean forest cover, a tracer of westerlies and precipitation, from a subtropical drill-core collected off South-West Iberia, with records of East Asia summer monsoon (EASM) strength and West Pacific surface temperatures, and model simulations. Here we show that south-western European winter precipitation and EASM strength reached high levels during the Marine Isotope Stage 18 glacial. This anomalous situation was caused by nearly-continuous moisture supply from both oceans and its transport to higher latitudes through the westerlies, likely fuelling the accelerated expansion of northern hemisphere ice-sheets during the late MPT.< Réduire

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https://oskar-bordeaux.fr/handle/20.500.12278/199983

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http://dx.doi.org/10.1038/s41467-023-38337-4

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EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Moist and warm conditions in Eurasia during the last glacial of the Middle Pleistocene Transition

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Résumé en anglais

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