Articles | Volume 17, issue 3
Research article
15 Mar 2023
Research article |  | 15 Mar 2023

Holocene history of the 79° N ice shelf reconstructed from epishelf lake and uplifted glaciomarine sediments

James A. Smith, Louise Callard, Michael J. Bentley, Stewart S. R. Jamieson, Maria Luisa Sánchez-Montes, Timothy P. Lane, Jeremy M. Lloyd, Erin L. McClymont, Christopher M. Darvill, Brice R. Rea, Colm O'Cofaigh, Pauline Gulliver, Werner Ehrmann, Richard S. Jones, and David H. Roberts

Data sets

Chronological sedimentological data (radiocarbon 14C) for cores LC7 and LC12 sediment record from Blaso, a large, epishelf lake in NW Greenland collected July-August 2017 (Version 1.0) J. Smith, L. Callard, M. Sanchez Montes, E. McClymont, J. Lloyd, W. Ehrmann, D. Roberts, M. Bentley, S. Jamieson, T. Lane, and C. Darvill

Short summary
The Greenland Ice Sheet is melting at an accelerating rate. To understand the significance of these changes we reconstruct the history of one of its fringing ice shelves, known as 79° N ice shelf. We show that the ice shelf disappeared 8500 years ago, following a period of enhanced warming. An important implication of our study is that 79° N ice shelf is susceptible to collapse when atmospheric and ocean temperatures are ~2°C warmer than present, which could occur by the middle of this century.