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Warm summers during the Younger Dryas cold reversal

Author

Listed:
  • Frederik Schenk

    (Stockholm University
    Linné FLOW Centre, KTH Royal Institute of Technology)

  • Minna Väliranta

    (University of Helsinki)

  • Francesco Muschitiello

    (Stockholm University
    University of Cambridge
    Columbia University)

  • Lev Tarasov

    (Memorial University of Newfoundland)

  • Maija Heikkilä

    (University of Helsinki)

  • Svante Björck

    (Stockholm University
    Quaternary Sciences, Lund University)

  • Jenny Brandefelt

    (Swedish Nuclear Fuel and Waste Management Company (SKB))

  • Arne V. Johansson

    (Linné FLOW Centre, KTH Royal Institute of Technology)

  • Jens-Ove Näslund

    (Swedish Nuclear Fuel and Waste Management Company (SKB)
    Stockholm University)

  • Barbara Wohlfarth

    (Stockholm University)

Abstract

The Younger Dryas (YD) cold reversal interrupts the warming climate of the deglaciation with global climatic impacts. The sudden cooling is typically linked to an abrupt slowdown of the Atlantic Meridional Overturning Circulation (AMOC) in response to meltwater discharges from ice sheets. However, inconsistencies regarding the YD-response of European summer temperatures have cast doubt whether the concept provides a sufficient explanation. Here we present results from a high-resolution global climate simulation together with a new July temperature compilation based on plant indicator species and show that European summers remain warm during the YD. Our climate simulation provides robust physical evidence that atmospheric blocking of cold westerly winds over Fennoscandia is a key mechanism counteracting the cooling impact of an AMOC-slowdown during summer. Despite the persistence of short warm summers, the YD is dominated by a shift to a continental climate with extreme winter to spring cooling and short growing seasons.

Suggested Citation

  • Frederik Schenk & Minna Väliranta & Francesco Muschitiello & Lev Tarasov & Maija Heikkilä & Svante Björck & Jenny Brandefelt & Arne V. Johansson & Jens-Ove Näslund & Barbara Wohlfarth, 2018. "Warm summers during the Younger Dryas cold reversal," Nature Communications, Nature, vol. 9(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04071-5
    DOI: 10.1038/s41467-018-04071-5
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    Cited by:

    1. Heather M. Stoll & Isabel Cacho & Edward Gasson & Jakub Sliwinski & Oliver Kost & Ana Moreno & Miguel Iglesias & Judit Torner & Carlos Perez-Mejias & Negar Haghipour & Hai Cheng & R. Lawrence Edwards, 2022. "Rapid northern hemisphere ice sheet melting during the penultimate deglaciation," Nature Communications, Nature, vol. 13(1), pages 1-16, December.
    2. Pablo Torres & Soledad Le Clainche & Ricardo Vinuesa, 2021. "On the Experimental, Numerical and Data-Driven Methods to Study Urban Flows," Energies, MDPI, vol. 14(5), pages 1-38, February.

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