Mass balance of the Antarctic Ice Sheet from 1992 to 2017

Abstract

The Antarctic Ice Sheet is an important indicator of climate change and driver of sea-level rise. Here we combine satellite observations of its changing volume, flow and gravitational attraction with modelling of its surface mass balance to show that it lost 2,720± 1,390 billion tonnes of ice between 1992 and 2017, which corresponds to an increase in mean sea level of 7.6± 3.9 millimetres (errors are one standard deviation). Over this period, ocean-driven melting has caused rates of ice loss from West Antarctica to increase from 53±29 billion to 159±26 billion tonnes per year; ice-shelf collapse has increased the rate of ice loss from the Antarctic Peninsula from 7± 13 billion to 33± 16 billion tonnes per year. We find large variations in and among model estimates of surface mass balance and glacial isostatic adjustment for East Antarctica, with its average rate of mass gain over the period 1992–2017 (5 ± 46 billion tonnes per year) being the least certain.

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Item Type:	Article
Authors/Creators:	The IMBIE Team Shepherd, A https://orcid.org/0000-0002-4914-1299 Ivins, E Rignot, E Smith, B van den Broeke, M Velicogna, I Whitehouse, P Briggs, K Joughin, I Krinner, G Nowicki, S Payne, T Scambos, T Schlegel, N Geruo, A Agosta, C Ahlstrøm, A Babonis, G Barletta, V Blazquez, A Bonin, J Csatho, B Cullather, R Felikson, D Fettweis, X Forsberg, R Gallee, H Gardner, A Gilbert, L Groh, A Gunter, B Hanna, E Harig, C Helm, V Horvath, A Howath, M Khan, S Kjeldsen, KK Konrad, H Langen, P Lecavalier, B Loomis, B Luthcke, S McMillan, M https://orcid.org/0000-0002-5113-0177 Melini, D Mernild, S Mohajerani, Y Moore, P Mouginot, J Moyano, G Muir, A Nagler, T Nield, G Nilsson, J Noel, B Otosaka, I https://orcid.org/0000-0001-9740-3735 Pattle, ME Peltier, WR Pie, N Rietbroek, R Rott, H Sanderg-Sørensen, L Sasgen, I Save, H Scheuchl, B Schrama, E Schröder, L Seo, K-W Simonsen, S Slater, T https://orcid.org/0000-0003-2541-7788 Spada, G Sutterley, T Talpe, M Tarasov, L van de Berg, WJ van der Wal, W van Wessem, M Vishwakarma, BD Wiese, D Wouters, B
Copyright, Publisher and Additional Information:	© 2018 Macmillan Publishers Limited, part of Springer Nature. This is an author produced version of a paper published in Nature. Uploaded in accordance with the publisher's self-archiving policy.
Dates:	Published: 13 June 2018 Published (online): 13 June 2018 Accepted: 24 April 2018
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	03 Jul 2018 09:11
Last Modified:	10 Jul 2020 12:48
Status:	Published
Publisher:	Nature Publishing Group
Identification Number:	10.1038/s41586-018-0179-y
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:132373

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Mass balance of the Antarctic Ice Sheet from 1992 to 2017

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