Back to Search
Start Over
Antarctic ice sheet response to sudden and sustained ice-shelf collapse (ABUMIP).
- Source :
- Journal of Glaciology; Dec2020, Vol. 66 Issue 260, p891-904, 14p
- Publication Year :
- 2020
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- ANTARCTIC ice
ICE sheets
ICE shelves
GLACIOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 00221430
- Volume :
- 66
- Issue :
- 260
- Database :
- Complementary Index
- Journal :
- Journal of Glaciology
- Publication Type :
- Academic Journal
- Accession number :
- 147200465
- Full Text :
- https://doi.org/10.1017/jog.2020.67