Details

Autor(en) / Beteiligte

• Sun, Sainan
• Pattyn, Frank
• Simon, Erika G.
• Albrecht, Torsten
• Cornford, Stephen
• Calov, Reinhard
• Dumas, Christophe
• Gillet-Chaulet, Fabien
• Goelzer, Heiko
• Golledge, Nicholas R.
• Greve, Ralf
• Hoffman, Matthew J.
• Humbert, Angelika
• Kazmierczak, Elise
• Kleiner, Thomas
• Leguy, Gunter R.
• Lipscomb, William H.
• Martin, Daniel
• Morlighem, Mathieu
• Nowicki, Sophie
• Pollard, David
• Price, Stephen
• Quiquet, Aurélien
• Seroussi, Hélène
• Schlemm, Tanja
• Sutter, Johannes
• van de Wal, Roderik S. W.
• Winkelmann, Ricarda
• Zhang, Tong

Titel

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

Ist Teil von

• Journal of glaciology, 2020-12, Vol.66 (260), p.891-904

Ort / Verlag

Cambridge, UK: Cambridge University Press

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.