Skip to content

Research at St Andrews

Unstable ice stream in Greenland during the Younger Dryas cold event

Research output: Contribution to journalArticle

DOI

Author(s)

Vincent Rinterknecht, Vincent Jomelli, Daniel Brunstein, Vincent Favier, Valérie Masson-Delmotte, Didier Bourlès, Laëtitia Leanni, Romain Schläppy

School/Research organisations

Abstract

Past, present, and future ice sheet stability is closely linked to the dynamic behavior of major draining ice streams and surrounding ice shelves. While short observational records document the recent variability and acceleration of ice streams, the long-term dynamics of ice streams remain poorly documented. Here, we date the Pjetursson’s Moraine on Disko Island, Greenland, to 12.2 ± 0.6 ka and demonstrate that the Jakobshavn Isbræ (JI) ice stream collapsed during the middle of the Younger Dryas (YD) cold interval. We suggest that this collapse was due to the incursion of warm subsurface water under the ice shelf fronting the JI ice stream, as well as increased surface-air temperature and sea-surface temperature seasonality starting at the beginning of the YD cold interval. The triggered acceleration of the land-based JI and the delivery of icebergs into Disko Bugt potentially contributed to Heinrich Event 0 at the end of the YD. The collapse of the JI ice stream 12.2 ± 0.6 ka ago demonstrates that calving marine-based ice margins can respond rapidly to environmental changes. It provides a new benchmark for marine-terminating ice stream models.
Close

Details

Original languageEnglish
Pages (from-to)759-762
Number of pages4
JournalGeology
Volume42
Issue number9
Early online date14 Jul 2014
DOIs
Publication statusPublished - Sep 2014

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by journal

  1. Geology (Journal)

    Chris Hawkesworth (Member of editorial board)
    20042008

    Activity: Publication peer-review and editorial work typesEditor of research journal

  2. Geology (Journal)

    Michael Ian Bird (Member of editorial board)
    2000 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. Insights into past ocean proxies from micron-scale mapping of sulfur species in carbonates

    Rose, C. V., Webb, S. M., Newville, M., Lanzirotti, A., Richardson, J. A., Tosca, N. J., Catalano, J. G., Bradley, A. S. & Fike, D. A., 5 Jul 2019, In : Geology. In press

    Research output: Contribution to journalArticle

  2. Climatic control on Icelandic volcanic activity during the mid-Holocene

    Swindles, G. T., Watson, E. J., Savov, I. P., Lawson, I. T., Schmidt, A., Hooper, A., Cooper, C. L., Connor, C. B., Gloor, M. & Carrivick, J. L., Jan 2018, In : Geology. 46, 1, p. 47-50 4 p.

    Research output: Contribution to journalArticle

  3. Warm and cold wet-states in the western United States during the Pliocene-Pleistocene

    Ibarra, D., Oster, J., Winnick, M., Caves Rugenstein, J., Byrne, M. P. & Chamberlain, P., 15 Feb 2018, In : Geology. 46, 4, p. 355-358 4 p.

    Research output: Contribution to journalArticle

  4. Internal dynamics condition centennial-scale oscillations in marinebased ice-stream retreat

    Smedley, R. K., Chiverrell, R. C., Ballantyne, C. K., Burke, M. J., Clark, C. D., Duller, G. A. T., Fabel, D., McCarroll, D., Scourse, J. D., Small, D. & Thomas, G. S. P., Jul 2017, In : Geology. 45, 9, p. 787-790 4 p.

    Research output: Contribution to journalArticle

  5. Duration and nature of the end-Cryogenian (Marinoan) glaciation

    Prave, A. R., Condon, D. J., Hoffmann, K. H., Tapster, S. & Fallick, A. E., 1 Aug 2016, In : Geology. 44, 8, p. 631-634 4 p.

    Research output: Contribution to journalArticle

ID: 143703804