Shepherd, A;
Gilbert, L;
Muir, AS;
Konrad, H;
McMillan, M;
Slater, T;
Briggs, KH;
... Engdahl, ME; + view all
Trends in Antarctic Ice Sheet Elevation and Mass.
Geophysical Research Letters
10.1029/2019GL082182.
(In press).
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Abstract
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed −1.1 ± 0.4 and +5.7 ± 0.8 mm to global sea level between 1992 and 2017
| Type: | Article |
|---|---|
| Title: | Trends in Antarctic Ice Sheet Elevation and Mass |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2019GL082182 |
| Publisher version: | https://doi.org/10.1029/2019GL082182 |
| Language: | English |
| Additional information: | This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/ |
| Keywords: | climate, Antarctica, satellite, altimetry, imbalance, sea level |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10079495 |
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