Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model
Abstract The Antarctic Peninsula's widespread glacier retreat and ice shelf collapse have been attributed to atmospheric and oceanic warming. Following the initial post-collapse period of retreat, several former tributary glaciers of the Larsen A and B ice shelves have been slowly re-advancing...
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Online Access: | http://dx.doi.org/10.1017/jog.2023.2 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000023 |
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crcambridgeupr:10.1017/jog.2023.2 2024-09-15T17:47:53+00:00 Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model Aberle, Rainey Enderlin, Ellyn M. Marshall, Hans-Peter Kopera, Michal Meehan, Tate G. National Science Foundation 2023 http://dx.doi.org/10.1017/jog.2023.2 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000023 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 277, page 1109-1124 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.2 2024-07-10T04:04:16Z Abstract The Antarctic Peninsula's widespread glacier retreat and ice shelf collapse have been attributed to atmospheric and oceanic warming. Following the initial post-collapse period of retreat, several former tributary glaciers of the Larsen A and B ice shelves have been slowly re-advancing for more than a decade. Here, we use a flowline model of Crane Glacier to gauge the sensitivity of former tributary glaciers to future climate change following this period of long-term dynamic adjustment. The glacier's long-term geometry and speed changes are similar to those of other former Larsen A and B tributaries, suggesting that Crane Glacier is a reasonable representation of regional dynamics. For the unperturbed climate simulations, discharge remains nearly unchanged in 2018–2100, indicating that dynamic readjustment to shelf collapse took ~15 years. Despite large uncertainties in Crane Glacier's past and future climate forcing, a wide range of future climate scenarios leads to a relatively modest range in grounding line discharge (0.8–1.5 Gt a −1 ) by 2100. Based on the model results for Crane, we infer that although former ice shelf tributaries may readvance following collapse, similar to the tidewater glacier cycle, their dynamic response to future climate perturbations should be less than their response to ice shelf collapse. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Ice Shelves Journal of Glaciology Tidewater Cambridge University Press Journal of Glaciology 1 16 |
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Cambridge University Press |
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English |
description |
Abstract The Antarctic Peninsula's widespread glacier retreat and ice shelf collapse have been attributed to atmospheric and oceanic warming. Following the initial post-collapse period of retreat, several former tributary glaciers of the Larsen A and B ice shelves have been slowly re-advancing for more than a decade. Here, we use a flowline model of Crane Glacier to gauge the sensitivity of former tributary glaciers to future climate change following this period of long-term dynamic adjustment. The glacier's long-term geometry and speed changes are similar to those of other former Larsen A and B tributaries, suggesting that Crane Glacier is a reasonable representation of regional dynamics. For the unperturbed climate simulations, discharge remains nearly unchanged in 2018–2100, indicating that dynamic readjustment to shelf collapse took ~15 years. Despite large uncertainties in Crane Glacier's past and future climate forcing, a wide range of future climate scenarios leads to a relatively modest range in grounding line discharge (0.8–1.5 Gt a −1 ) by 2100. Based on the model results for Crane, we infer that although former ice shelf tributaries may readvance following collapse, similar to the tidewater glacier cycle, their dynamic response to future climate perturbations should be less than their response to ice shelf collapse. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Aberle, Rainey Enderlin, Ellyn M. Marshall, Hans-Peter Kopera, Michal Meehan, Tate G. |
spellingShingle |
Aberle, Rainey Enderlin, Ellyn M. Marshall, Hans-Peter Kopera, Michal Meehan, Tate G. Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
author_facet |
Aberle, Rainey Enderlin, Ellyn M. Marshall, Hans-Peter Kopera, Michal Meehan, Tate G. |
author_sort |
Aberle, Rainey |
title |
Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
title_short |
Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
title_full |
Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
title_fullStr |
Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
title_full_unstemmed |
Assessing controls on ice dynamics at Crane Glacier, Antarctic Peninsula, using a numerical ice flow model |
title_sort |
assessing controls on ice dynamics at crane glacier, antarctic peninsula, using a numerical ice flow model |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.2 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000023 |
genre |
Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Ice Shelves Journal of Glaciology Tidewater |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Ice Shelves Journal of Glaciology Tidewater |
op_source |
Journal of Glaciology volume 69, issue 277, page 1109-1124 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.2 |
container_title |
Journal of Glaciology |
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1 |
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16 |
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1810497585045045248 |