The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage
From 2017 to 2020, three significant calving events took place on Pine Island Glacier, West Antarctica. Ice-shelf velocities changed over this period and the calving events have been suggested as possible drivers. However, satellite observations also show significant changes in the areal extent of f...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Cambridge University Press
2023-12-01
|
| Series: | Journal of Glaciology |
| Subjects: | |
| Online Access: | https://www.cambridge.org/core/product/identifier/S002214302300076X/type/journal_article |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850061723142193152 |
|---|---|
| author | Sainan Sun G. Hilmar Gudmundsson |
| author_facet | Sainan Sun G. Hilmar Gudmundsson |
| author_sort | Sainan Sun |
| collection | DOAJ |
| description | From 2017 to 2020, three significant calving events took place on Pine Island Glacier, West Antarctica. Ice-shelf velocities changed over this period and the calving events have been suggested as possible drivers. However, satellite observations also show significant changes in the areal extent of fracture zones, especially in the marginal areas responsible for providing lateral support to the ice shelf. Here, we conduct a model study to identify and quantify drivers of recent ice-flow changes of the Pine Island Ice Shelf. In agreement with recent studies, we find that the calving events caused significant velocity changes over the ice shelf. However, calving alone cannot explain observed velocity changes. Changes in the structural rigidity, i.e. ice damage, further significantly impacted ice flow. We suggest that ice damage evolution of the ice-shelf margins may have influenced recent calving events, and these two processes are linked. |
| format | Article |
| id | doaj-art-0b35936ca4c6440589fcfeb09c1142a2 |
| institution | DOAJ |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj-art-0b35936ca4c6440589fcfeb09c1142a22025-08-20T02:50:08ZengCambridge University PressJournal of Glaciology0022-14301727-56522023-12-01691983199110.1017/jog.2023.76The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damageSainan Sun0https://orcid.org/0000-0002-1614-2658G. Hilmar Gudmundsson1https://orcid.org/0000-0003-4236-5369Department of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, UKDepartment of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, UKFrom 2017 to 2020, three significant calving events took place on Pine Island Glacier, West Antarctica. Ice-shelf velocities changed over this period and the calving events have been suggested as possible drivers. However, satellite observations also show significant changes in the areal extent of fracture zones, especially in the marginal areas responsible for providing lateral support to the ice shelf. Here, we conduct a model study to identify and quantify drivers of recent ice-flow changes of the Pine Island Ice Shelf. In agreement with recent studies, we find that the calving events caused significant velocity changes over the ice shelf. However, calving alone cannot explain observed velocity changes. Changes in the structural rigidity, i.e. ice damage, further significantly impacted ice flow. We suggest that ice damage evolution of the ice-shelf margins may have influenced recent calving events, and these two processes are linked.https://www.cambridge.org/core/product/identifier/S002214302300076X/type/journal_articleAntarctic glaciologyice dynamicsice-sheet modelling |
| spellingShingle | Sainan Sun G. Hilmar Gudmundsson The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage Journal of Glaciology Antarctic glaciology ice dynamics ice-sheet modelling |
| title | The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
| title_full | The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
| title_fullStr | The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
| title_full_unstemmed | The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
| title_short | The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
| title_sort | speedup of pine island ice shelf between 2017 and 2020 revaluating the importance of ice damage |
| topic | Antarctic glaciology ice dynamics ice-sheet modelling |
| url | https://www.cambridge.org/core/product/identifier/S002214302300076X/type/journal_article |
| work_keys_str_mv | AT sainansun thespeedupofpineislandiceshelfbetween2017and2020revaluatingtheimportanceoficedamage AT ghilmargudmundsson thespeedupofpineislandiceshelfbetween2017and2020revaluatingtheimportanceoficedamage AT sainansun speedupofpineislandiceshelfbetween2017and2020revaluatingtheimportanceoficedamage AT ghilmargudmundsson speedupofpineislandiceshelfbetween2017and2020revaluatingtheimportanceoficedamage |