A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf
The increasing contribution of the Antarctic Ice Sheet to sea level rise is linked to reductions in ice shelf buttressing, driven in large part by basal melting of ice shelves. These ocean-driven buttressing losses are being compounded as ice shelves weaken and fracture. To date, model projections o...
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ftcdlib:oai:escholarship.org/ark:/13030/qt4695s1s2 2023-05-15T14:04:04+02:00 A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf Borstad, C Khazendar, A Scheuchl, B Morlighem, M Larour, E Rignot, E 2027 - 2035 2016-03-16 application/pdf https://escholarship.org/uc/item/4695s1s2 unknown eScholarship, University of California qt4695s1s2 https://escholarship.org/uc/item/4695s1s2 public Geophysical Research Letters, vol 43, iss 5 ice shelf buttressing damage mechanics glaciology Meteorology & Atmospheric Sciences article 2016 ftcdlib 2021-05-30T17:54:13Z The increasing contribution of the Antarctic Ice Sheet to sea level rise is linked to reductions in ice shelf buttressing, driven in large part by basal melting of ice shelves. These ocean-driven buttressing losses are being compounded as ice shelves weaken and fracture. To date, model projections of ice sheet evolution have not accounted for weakening ice shelves. Here we present the first constitutive framework for ice deformation that explicitly includes mechanical weakening, based on observations of the progressive degradation of the remnant Larsen B Ice Shelf from 2000 to 2015. We implement this framework in an ice sheet model and are able to reproduce most of the observed weakening of the ice shelf. In addition to predicting ice shelf weakening and reduced buttressing, this new framework opens the door for improved understanding and predictions of iceberg calving, meltwater routing and hydrofracture, and ice shelf collapse. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* University of California: eScholarship Antarctic The Antarctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
ice shelf buttressing damage mechanics glaciology Meteorology & Atmospheric Sciences |
spellingShingle |
ice shelf buttressing damage mechanics glaciology Meteorology & Atmospheric Sciences Borstad, C Khazendar, A Scheuchl, B Morlighem, M Larour, E Rignot, E A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
topic_facet |
ice shelf buttressing damage mechanics glaciology Meteorology & Atmospheric Sciences |
description |
The increasing contribution of the Antarctic Ice Sheet to sea level rise is linked to reductions in ice shelf buttressing, driven in large part by basal melting of ice shelves. These ocean-driven buttressing losses are being compounded as ice shelves weaken and fracture. To date, model projections of ice sheet evolution have not accounted for weakening ice shelves. Here we present the first constitutive framework for ice deformation that explicitly includes mechanical weakening, based on observations of the progressive degradation of the remnant Larsen B Ice Shelf from 2000 to 2015. We implement this framework in an ice sheet model and are able to reproduce most of the observed weakening of the ice shelf. In addition to predicting ice shelf weakening and reduced buttressing, this new framework opens the door for improved understanding and predictions of iceberg calving, meltwater routing and hydrofracture, and ice shelf collapse. |
format |
Article in Journal/Newspaper |
author |
Borstad, C Khazendar, A Scheuchl, B Morlighem, M Larour, E Rignot, E |
author_facet |
Borstad, C Khazendar, A Scheuchl, B Morlighem, M Larour, E Rignot, E |
author_sort |
Borstad, C |
title |
A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
title_short |
A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
title_full |
A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
title_fullStr |
A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
title_full_unstemmed |
A constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant Larsen B Ice Shelf |
title_sort |
constitutive framework for predicting weakening and reduced buttressing of ice shelves based on observations of the progressive deterioration of the remnant larsen b ice shelf |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/4695s1s2 |
op_coverage |
2027 - 2035 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* |
op_source |
Geophysical Research Letters, vol 43, iss 5 |
op_relation |
qt4695s1s2 https://escholarship.org/uc/item/4695s1s2 |
op_rights |
public |
_version_ |
1766275039958663168 |