Year: 2020
Type: article
Abstract: Antarctica's ice shelves modulate the grounded ice flow, and weakening of ice shelves due to climate forcing will decrease their ‘buttressing’ effect, causing a response in the grounded ice. While the processes governing ice-shelf weakening are complex, uncertainties in the response of the grounded ice sheet are also difficult to assess. The Antarctic BUttressing Model Intercomparison Project (ABUMIP) compares ice-sheet model responses to decrease in buttressing by investigating the ‘end-member’ scenario of total and sustained loss of ice shelves. Although unrealistic, this scenario enables gauging the sensitivity of an ensemble of 15 ice-sheet models to a total loss of buttressing, hence exhibiting the full potential of marine ice-sheet instability. All models predict that this scenario leads to multi-metre (1–12 m) sea-level rise over 500 years from present day. West Antarctic ice sheet collapse alone leads to a 1.91–5.08 m sea-level rise due to the marine ice-sheet instability. Mass loss rates are a strong function of the sliding/friction law, with plastic laws cause a further destabilization of the Aurora and Wilkes Subglacial Basins, East Antarctica. Improvements to marine ice-sheet models have greatly reduced variability between modelled ice-sheet responses to extreme ice-shelf loss, e.g. compared to the SeaRISE assessments.
Source: Journal of Glaciology
DOI: 10.1017/jog.2020.67
Authors: Sainan Sun, Frank Pattyn, Erika G. Simon, Torsten Albrecht, Stephen Cornford, Reinhard Calov, Christophe Dumas, Fabien Gillet-Chaulet, Heiko Goelzer, Nicholas R. Golledge, Ralf Greve, Matthew J. Hoffman, Angelika Humbert, Elise Kazmierczak, Thomas Kleiner, Gunter R. Leguy, William H. Lipscomb, Daniel Martin, Mathieu Morlighem, Sophie Nowicki, David Pollard, Stephen Price, Aurélien Quiquet, Hélène Seroussi, Tanja Schlemm, Johannes Sutter, Roderik S. W. van de Wal, Ricarda Winkelmann, Tong Zhang
Institutions: Université Libre de Bruxelles, Goddard Space Flight Center, Leibniz Association, Potsdam Institute for Climate Impact Research, Swansea University, Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Laboratoire des Sciences du Climat et de l'Environnement, CEA Paris-Saclay, Institut des Géosciences de l'Environnement, Institut de Recherche pour le Développement, Utrecht University, Victoria University of Wellington, Hokkaido University, Los Alamos National Laboratory, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, University of Bremen, NSF National Center for Atmospheric Research, NSF NCAR Climate and Global Dynamics Laboratory, Lawrence Berkeley National Laboratory, University of California, Irvine, Pennsylvania State University, Jet Propulsion Laboratory, University of Potsdam, University of Bern, Oeschger Centre for Climate Change Research
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: gold
Estimated APC paid: $1,695
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, National Center for Atmospheric Research, Heinrich Böll Stiftung, National Energy Research Scientific Computing Center, Royal Society Te Apārangi, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Bundesministerium für Bildung und Forschung, Belgian Federal Science Policy Office, Grand Équipement National De Calcul Intensif, Netherlands Earth System Science Centre, Office of Science, Ames Research Center, University at Buffalo, Japan Society for the Promotion of Science, Advanced Scientific Computing Research, Biological and Environmental Research
Awards: Understanding the interaction between ice sheets, ocean and atmosphere under large scale climate changes of the past, G122673668, G1286236842, G1335240794, G1337544421, G1632040200, G1677143136, G1682952422, G1799333409, G1863003419, G2065256543, G223002938, The Management and Operation of the National Center for Atmoshperic Research (NCAR), G2880384052, Projecting discharge from the Greenland ice sheet using climatic forcings derived from atmosphere-ocean models, G3083819904, G3136028036, G3137522415, G3144226917, G3502641793, G3685081974, G419881185, G4208586222, G42916606, G4423001442, G4501827968, G465867758, G4736197316, G498139845, G5043543010, PalMod - 3.3 Daten-Modell Schnittstelle und Daten Analyse: Teilprojekt 1 'Einbau einer expliziten Diagnostik von stabilen Wasserisotopen in alle Komponenten des Erdsystem-Modells MPI-ESM', G5076365615, G5264466959, G5998132471, G6195818568, G623270878, NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET), G6622453712, Equipement d'excellence de calcul intensif de Mesocentres coordonnés - Tremplin vers le calcul petaflopique et l'exascale, G6652958823, G6871461198, G6881966545, G721673347, G7787287669, Innovative strategies for observing and modelling natural systems, G8335046644, G8435191741, G8805661079, G969889393
OpenAlex ID: W3085649984