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Journal Article

Antarctic ice sheet response to sudden and sustained ice-shelf collapse (ABUMIP)

Authors

Sun,  Sainan
External Organizations;

Pattyn,  Frank
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Simon,  Erika G.
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/persons/resource/Torsten.Albrecht

Albrecht,  Torsten
Potsdam Institute for Climate Impact Research;

Cornford,  Stephen
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/persons/resource/Reinhard.Calov

Calov,  Reinhard
Potsdam Institute for Climate Impact Research;

Dumas,  Christophe
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Gillet-Chaulet,  Fabien
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Goelzer,  Heiko
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Golledge,  Nicholas R.
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Greve,  Ralf
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Hoffman,  Matthew J.
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Humbert,  Angelika
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Kazmierczak,  Elise
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Kleiner,  Thomas
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Leguy,  Gunter R.
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Lipscomb,  William H.
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Martin,  Daniel
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Morlighem,  Mathieu
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Nowicki,  Sophie
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Pollard,  David
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Price,  Stephen
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Quiquet,  Aurélien
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Seroussi,  Hélène
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/persons/resource/Tanja.Schlemm

Schlemm,  Tanja
Potsdam Institute for Climate Impact Research;

Sutter,  Johannes
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van de Wal,  Roderik S. W.
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/persons/resource/Ricarda.Winkelmann

Winkelmann,  Ricarda
Potsdam Institute for Climate Impact Research;

Zhang,  Tong
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Fulltext (public)

24904oa.pdf
(Publisher version), 2MB

Supplementary Material (public)
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Citation

Sun, S., Pattyn, F., Simon, E. G., Albrecht, T., Cornford, S., Calov, R., Dumas, C., Gillet-Chaulet, F., Goelzer, H., Golledge, N. R., Greve, R., Hoffman, M. J., Humbert, A., Kazmierczak, E., Kleiner, T., Leguy, G. R., Lipscomb, W. H., Martin, D., Morlighem, M., Nowicki, S., Pollard, D., Price, S., Quiquet, A., Seroussi, H., Schlemm, T., Sutter, J., van de Wal, R. S. W., Winkelmann, R., Zhang, T. (2020): Antarctic ice sheet response to sudden and sustained ice-shelf collapse (ABUMIP). - Journal of Glaciology, 66, 260, 891-904.
https://doi.org/10.1017/jog.2020.67


Cite as: https://publications.pik-potsdam.de/pubman/item/item_24904
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 buttres-sing 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 func-tion 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.