The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage
Abstract 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 ex...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2023.76 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300076X |
id |
crcambridgeupr:10.1017/jog.2023.76 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2023.76 2024-03-03T08:38:34+00:00 The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage Sun, Sainan Gudmundsson, G. Hilmar Horizon 2020 Framework Programme Natural Environment Research Council Natural Environment Research Council 2023 http://dx.doi.org/10.1017/jog.2023.76 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300076X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology page 1-9 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.76 2024-02-08T08:35:11Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier West Antarctica Cambridge University Press West Antarctica Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Journal of Glaciology 1 9 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Sun, Sainan Gudmundsson, G. Hilmar The speedup of Pine Island Ice Shelf between 2017 and 2020: revaluating the importance of ice damage |
topic_facet |
Earth-Surface Processes |
description |
Abstract 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. |
author2 |
Horizon 2020 Framework Programme Natural Environment Research Council Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Sun, Sainan Gudmundsson, G. Hilmar |
author_facet |
Sun, Sainan Gudmundsson, G. Hilmar |
author_sort |
Sun, Sainan |
title |
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_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_sort |
speedup of pine island ice shelf between 2017 and 2020: revaluating the importance of ice damage |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.76 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300076X |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
West Antarctica Pine Island Glacier |
geographic_facet |
West Antarctica Pine Island Glacier |
genre |
Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier West Antarctica |
op_source |
Journal of Glaciology page 1-9 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.76 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
9 |
_version_ |
1792506976966541312 |