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Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial

Author

Listed:
  • P. C. Tzedakis

    (University College London)

  • R. N. Drysdale

    (The University of Melbourne
    Université Savoie Mont Blanc)

  • V. Margari

    (University College London)

  • L. C. Skinner

    (University of Cambridge)

  • L. Menviel

    (University of New South Wales
    Macquarie University)

  • R. H. Rhodes

    (University of Cambridge)

  • A. S. Taschetto

    (University of New South Wales)

  • D. A. Hodell

    (University of Cambridge)

  • S. J. Crowhurst

    (University of Cambridge)

  • J. C. Hellstrom

    (The University of Melbourne)

  • A. E. Fallick

    (Scottish Universities Environmental Research Centre)

  • J. O. Grimalt

    (Institute of Environmental Assessment and Water Research (IDAEA))

  • J. F. McManus

    (Columbia University)

  • B. Martrat

    (Institute of Environmental Assessment and Water Research (IDAEA))

  • Z. Mokeddem

    (Columbia University)

  • F. Parrenin

    (Université Grenoble Alpes)

  • E. Regattieri

    (University of Pisa)

  • K. Roe

    (University College London)

  • G. Zanchetta

    (University of Pisa)

Abstract

Considerable ambiguity remains over the extent and nature of millennial/centennial-scale climate instability during the Last Interglacial (LIG). Here we analyse marine and terrestrial proxies from a deep-sea sediment sequence on the Portuguese Margin and combine results with an intensively dated Italian speleothem record and climate-model experiments. The strongest expression of climate variability occurred during the transitions into and out of the LIG. Our records also document a series of multi-centennial intra-interglacial arid events in southern Europe, coherent with cold water-mass expansions in the North Atlantic. The spatial and temporal fingerprints of these changes indicate a reorganization of ocean surface circulation, consistent with low-intensity disruptions of the Atlantic meridional overturning circulation (AMOC). The amplitude of this LIG variability is greater than that observed in Holocene records. Episodic Greenland ice melt and runoff as a result of excess warmth may have contributed to AMOC weakening and increased climate instability throughout the LIG.

Suggested Citation

  • P. C. Tzedakis & R. N. Drysdale & V. Margari & L. C. Skinner & L. Menviel & R. H. Rhodes & A. S. Taschetto & D. A. Hodell & S. J. Crowhurst & J. C. Hellstrom & A. E. Fallick & J. O. Grimalt & J. F. Mc, 2018. "Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial," Nature Communications, Nature, vol. 9(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06683-3
    DOI: 10.1038/s41467-018-06683-3
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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. Elan J. Levy & Hubert B. Vonhof & Miryam Bar-Matthews & Alfredo Martínez-García & Avner Ayalon & Alan Matthews & Vered Silverman & Shira Raveh-Rubin & Tami Zilberman & Gal Yasur & Mareike Schmitt & Ge, 2023. "Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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