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A reconciled estimate of ice-sheet mass balance
journal contribution
posted on 2023-05-17, 16:44 authored by Shepherd, A, Ivins, ER, Geruo, A, Barletta, VR, Bentley, MJ, Bettadpur, S, Briggs, KH, Bromwich, DH, Forsberg, R, Galin, N, Horwath, M, Jacobs, S, Joughin, I, Matt KingMatt King, Lenaerts, JTM, Li, J, Ligtenberg, SRM, Luckman, A, Luthcke, SB, McMillan, M, Meister, R, Milne, G, Mouginot, J, Muir, A, Nicolas, JP, Paden, J, Payne, AJ, Pritchard, H, Rignot, E, Rott, H, Sorensen, LS, Scambos, TA, Scheuchl, B, Schrama, EJO, Smith, B, Sundal, AV, Van Angelen, JH, Van De Berg, WJ, Van Den Broeke, MR, Vaughan, DG, Velicogna, I, Wahr, J, Whitehouse, PL, Wingham, DJ, Yi, D, Young, D, Zwally, HJWe combined an ensemble of satellite altimetry, interferometry, and gravimetry data sets using common geographical regions, time intervals, and models of surface mass balance and glacial isostatic adjustment to estimate the mass balance of Earth’s polar ice sheets. We find that there is good agreement between different satellite methods—especially in Greenland and West Antarctica—and that combining satellite data sets leads to greater certainty. Between 1992 and 2011, the ice sheets of Greenland, East Antarctica, West Antarctica, and the Antarctic Peninsula changed in mass by –142 ± 49, +14 ± 43, –65 ± 26, and –20 ± 14 gigatonnes year−1, respectively. Since 1992, the polar ice sheets have contributed, on average, 0.59 ± 0.20 millimeter year−1 to the rate of global sea-level rise.
History
Publication title
ScienceVolume
338Issue
6111Pagination
1183-1189ISSN
0036-8075Department/School
School of Geography, Planning and Spatial SciencesPublisher
Amer Assoc Advancement SciencePlace of publication
1200 New York Ave, Nw, Washington, USA, Dc, 20005Rights statement
Copyright 2012 American Association for the Advancement of ScienceRepository Status
- Restricted