A reconciled estimate of ice-sheet mass balance.

Andrew Shepherd, Erik R Ivins, Geruo A, Valentina Roberta Barletta, Mike J Bentley, Srinivas Bettadpur, Kate H Briggs, David H Bromwich, René Forsberg, Natalia Galin, Martin Horwath, Stan Jacobs, Ian Joughin, Matt A King, Jan T M Lenaerts, Jilu Li, Stefan R M Ligtenberg, Adrian Luckman, Scott B Luthcke, Malcolm McMillanRakia Meister, Glenn Milne, Jeremie Mouginot, Alan Muir, Julien P Nicolas, John Paden, Antony J Payne, Hamish Pritchard, Eric Rignot, Helmut Rott, Louise Sandberg Sørensen, Ted A Scambos, Bernd Scheuchl, Ernst J O Schrama, Ben Smith, Aud V Sundal, Jan H van Angelen, Willem J van de Berg, Michiel R van den Broeke, David Vaughan, Isabella Velicogna, John Wahr, Pippa L Whitehouse, Duncan J Wingham, Donghui Yi, Duncan Young, H Jay Zwally

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We 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.
Original languageEnglish
JournalScience
Volume338
Issue number6111
Pages (from-to)1183-1189
ISSN0036-8075
DOIs
Publication statusPublished - 2012

Cite this

Shepherd, A., Ivins, E. R., A, G., Barletta, V. R., Bentley, M. J., Bettadpur, S., ... Zwally, H. J. (2012). A reconciled estimate of ice-sheet mass balance. Science, 338(6111), 1183-1189. https://doi.org/10.1126/science.1228102