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

Author

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  • María Fernanda Sánchez Goñi

    (Ecole Pratique des Hautes Etudes (EPHE, PSL University)
    Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805)

  • Thomas Extier

    (Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805)

  • Josué M. Polanco-Martínez

    (University of Salamanca
    Basque Centre for Climate Change (BC3))

  • Coralie Zorzi

    (Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805)

  • Teresa Rodrigues

    (Instituto Português do Mar e da Atmosfera)

  • André Bahr

    (Heidelberg University)

Abstract

The 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.

Suggested Citation

  • María Fernanda Sánchez Goñi & Thomas Extier & Josué M. Polanco-Martínez & Coralie Zorzi & Teresa Rodrigues & André Bahr, 2023. "Moist and warm conditions in Eurasia during the last glacial of the Middle Pleistocene Transition," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38337-4
    DOI: 10.1038/s41467-023-38337-4
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    References listed on IDEAS

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    1. Thibaut Caley & Didier M. Roche & Hans Renssen, 2014. "Orbital Asian summer monsoon dynamics revealed using an isotope-enabled global climate model," Nature Communications, Nature, vol. 5(1), pages 1-6, December.
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    3. Bernd Wagner & Hendrik Vogel & Alexander Francke & Tobias Friedrich & Timme Donders & Jack H. Lacey & Melanie J. Leng & Eleonora Regattieri & Laura Sadori & Thomas Wilke & Giovanni Zanchetta & Christi, 2019. "Mediterranean winter rainfall in phase with African monsoons during the past 1.36 million years," Nature, Nature, vol. 573(7773), pages 256-260, September.
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