A detection of the sea level fingerprint of Greenland Ice Sheet melt

Author:

Coulson Sophie1ORCID,Dangendorf Sönke2ORCID,Mitrovica Jerry X.3ORCID,Tamisiea Mark E.4,Pan Linda3ORCID,Sandwell David T.5ORCID

Affiliation:

1. Fluid Dynamics and Solid Mechanics Group, Los Alamos National Laboratory, Los Alamos, NM, USA.

2. Department of River-Coastal Science and Engineering, Tulane University, New Orleans, LA, USA.

3. Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA.

4. Center for Space Research, University of Texas, Austin, TX, USA.

5. Institute of Geophysics and Planetary Physics, University of California, San Diego, CA, USA.

Abstract

Rapid melting of ice sheets and glaciers drives a unique geometry, or fingerprint, of sea level change. However, the detection of individual fingerprints has been challenging because of sparse observations at high latitudes and the difficulty of disentangling ocean dynamic variability from the signal. We predict the fingerprint of Greenland Ice Sheet (GrIS) melt using recent ice mass loss estimates from radar altimetry data and model reconstructions of nearby glaciers and compare this prediction to an independent, altimetry-derived sea surface height trend corrected for ocean dynamic variability in the region adjacent to the ice sheet. A statistically significant correlation between the two fields ( P < 0.001) provides an unambiguous observational detection of the near-field sea level fingerprint of recent GrIS melting in our warming world.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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