Nonlinear rise in Greenland runoff in response to post-industrial Arctic warming

Luke D. Trusel (), Sarah B. Das, Matthew B. Osman, Matthew J. Evans, Ben E. Smith, Xavier Fettweis, Joseph R. McConnell, Brice P. Y. Noël and Michiel R. Broeke
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Luke D. Trusel: Rowan University
Sarah B. Das: Woods Hole Oceanographic Institution
Matthew B. Osman: Massachusetts Institute of Technology/Woods Hole Oceanographic Institution
Matthew J. Evans: Wheaton College
Ben E. Smith: University of Washington
Xavier Fettweis: University of Liège
Joseph R. McConnell: Desert Research Institute
Brice P. Y. Noël: Utrecht University
Michiel R. Broeke: Utrecht University

Nature, 2018, vol. 564, issue 7734, 104-108

Abstract: Abstract The Greenland ice sheet (GrIS) is a growing contributor to global sea-level rise1, with recent ice mass loss dominated by surface meltwater runoff2,3. Satellite observations reveal positive trends in GrIS surface melt extent4, but melt variability, intensity and runoff remain uncertain before the satellite era. Here we present the first continuous, multi-century and observationally constrained record of GrIS surface melt intensity and runoff, revealing that the magnitude of recent GrIS melting is exceptional over at least the last 350 years. We develop this record through stratigraphic analysis of central west Greenland ice cores, and demonstrate that measurements of refrozen melt layers in percolation zone ice cores can be used to quantifiably, and reproducibly, reconstruct past melt rates. We show significant (P

Keywords: GrIS Melt; Record Melting; Greenland Ice Sheet (GrIS); Meltwater Runoff; Uneven Melting (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1038/s41586-018-0752-4

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