Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula
The speed-up of glaciers following ice shelf collapse can accelerate ice mass loss dramatically. Investigating the deformation of landfast sea ice enables studying its resistive (buttressing) stresses and mechanisms driving ice collapse. Here, we apply offset tracking to Sentinel-1 A/B synthetic ape...
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Authorea, Inc.
2023
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Online Access: | http://dx.doi.org/10.22541/essoar.168167149.94349869/v1 |
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crwinnower:10.22541/essoar.168167149.94349869/v1 2024-06-02T07:58:25+00:00 Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula Sun, Yudong Riel, Bryan Minchew, Brent 2023 http://dx.doi.org/10.22541/essoar.168167149.94349869/v1 unknown Authorea, Inc. posted-content 2023 crwinnower https://doi.org/10.22541/essoar.168167149.94349869/v1 2024-05-07T14:19:21Z The speed-up of glaciers following ice shelf collapse can accelerate ice mass loss dramatically. Investigating the deformation of landfast sea ice enables studying its resistive (buttressing) stresses and mechanisms driving ice collapse. Here, we apply offset tracking to Sentinel-1 A/B synthetic aperture radar (SAR) data to obtain a 2014-2022 time-series of horizontal velocity and strain rate fields of landfast ice filling the embayment formerly covered by the Larsen B Ice Shelf, Antarctic Peninsula until 2002. The landfast ice disintegrated in 2022, and we find that it was precipitated by a few large opening rifts. Upstream glaciers did not accelerate after the collapse, which implies little buttressing effect from landfast ice, a conclusion supported by the near-zero correlation between glacier velocity and landfast ice area. Our observations suggest that buttressing stresses are unlikely to be recovered by landfast sea ice over sub-decadal timescales following the collapse of an ice shelf. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice The Winnower Antarctic Antarctic Peninsula |
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Open Polar |
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The Winnower |
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crwinnower |
language |
unknown |
description |
The speed-up of glaciers following ice shelf collapse can accelerate ice mass loss dramatically. Investigating the deformation of landfast sea ice enables studying its resistive (buttressing) stresses and mechanisms driving ice collapse. Here, we apply offset tracking to Sentinel-1 A/B synthetic aperture radar (SAR) data to obtain a 2014-2022 time-series of horizontal velocity and strain rate fields of landfast ice filling the embayment formerly covered by the Larsen B Ice Shelf, Antarctic Peninsula until 2002. The landfast ice disintegrated in 2022, and we find that it was precipitated by a few large opening rifts. Upstream glaciers did not accelerate after the collapse, which implies little buttressing effect from landfast ice, a conclusion supported by the near-zero correlation between glacier velocity and landfast ice area. Our observations suggest that buttressing stresses are unlikely to be recovered by landfast sea ice over sub-decadal timescales following the collapse of an ice shelf. |
format |
Other/Unknown Material |
author |
Sun, Yudong Riel, Bryan Minchew, Brent |
spellingShingle |
Sun, Yudong Riel, Bryan Minchew, Brent Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
author_facet |
Sun, Yudong Riel, Bryan Minchew, Brent |
author_sort |
Sun, Yudong |
title |
Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
title_short |
Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
title_full |
Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
title_fullStr |
Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
title_full_unstemmed |
Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula |
title_sort |
disintegration and buttressing effect of the landfast sea ice in the larsen b embayment, antarctic peninsula |
publisher |
Authorea, Inc. |
publishDate |
2023 |
url |
http://dx.doi.org/10.22541/essoar.168167149.94349869/v1 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice |
op_doi |
https://doi.org/10.22541/essoar.168167149.94349869/v1 |
_version_ |
1800741754023968768 |