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East Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreat

Author

Listed:
  • Marius Folden Simonsen

    (University of Copenhagen)

  • Giovanni Baccolo

    (University Milano-Bicocca)

  • Thomas Blunier

    (University of Copenhagen)

  • Alejandra Borunda

    (Columbia University
    Columbia University)

  • Barbara Delmonte

    (University Milano-Bicocca)

  • Robert Frei

    (University of Copenhagen)

  • Steven Goldstein

    (Columbia University
    Columbia University)

  • Aslak Grinsted

    (University of Copenhagen)

  • Helle Astrid Kjær

    (University of Copenhagen)

  • Todd Sowers

    (Pennsylvania State University)

  • Anders Svensson

    (University of Copenhagen)

  • Bo Vinther

    (University of Copenhagen)

  • Diana Vladimirova

    (University of Copenhagen)

  • Gisela Winckler

    (Columbia University
    Columbia University)

  • Mai Winstrup

    (Danish Meteorological Institute)

  • Paul Vallelonga

    (University of Copenhagen)

Abstract

Accurate estimates of the past extent of the Greenland ice sheet provide critical constraints for ice sheet models used to determine Greenland’s response to climate forcing and contribution to global sea level. Here we use a continuous ice core dust record from the Renland ice cap on the east coast of Greenland to constrain the timing of changes to the ice sheet margin and relative sea level over the last glacial cycle. During the Holocene and the previous interglacial period (Eemian) the dust record was dominated by coarse particles consistent with rock samples from central East Greenland. From the coarse particle concentration record we infer the East Greenland ice sheet margin advanced from 113.4 ± 0.4 to 111.0 ± 0.4 ka BP during the glacial onset and retreated from 12.1 ± 0.1 to 9.0 ± 0.1 ka BP during the last deglaciation. These findings constrain the possible response of the Greenland ice sheet to climate forcings.

Suggested Citation

  • Marius Folden Simonsen & Giovanni Baccolo & Thomas Blunier & Alejandra Borunda & Barbara Delmonte & Robert Frei & Steven Goldstein & Aslak Grinsted & Helle Astrid Kjær & Todd Sowers & Anders Svensson , 2019. "East Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreat," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12546-2
    DOI: 10.1038/s41467-019-12546-2
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