Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets
Abstract The Antarctic Peninsula Ice Sheet (APIS) has become a significant contributor to sea-level rise over recent decades. Accurately estimating the ice discharge from the outlet glaciers of the APIS is crucial to quantify the mass balance of the Antarctic Peninsula. We here compute the ice disch...
Published in: | Annals of Glaciology |
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Online Access: | http://dx.doi.org/10.1017/aog.2023.67 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000678 |
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crcambridgeupr:10.1017/aog.2023.67 2024-06-09T07:38:30+00:00 Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets Shahateet, Kaian Navarro, Francisco Seehaus, Thorsten Fürst, Johannes J. Braun, Matthias Agencia Estatal de Investigación Elitenetzwerk Bayern Deutscher Akademischer Austauschdienst 2023 http://dx.doi.org/10.1017/aog.2023.67 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000678 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 64, issue 91, page 121-132 ISSN 0260-3055 1727-5644 journal-article 2023 crcambridgeupr https://doi.org/10.1017/aog.2023.67 2024-05-15T13:02:25Z Abstract The Antarctic Peninsula Ice Sheet (APIS) has become a significant contributor to sea-level rise over recent decades. Accurately estimating the ice discharge from the outlet glaciers of the APIS is crucial to quantify the mass balance of the Antarctic Peninsula. We here compute the ice discharge from the outlet glaciers of the APIS north of 70 ${^\circ }$ S for the five most widely used ice-thickness reconstructions, using a common surface velocity field and a common set of flux gates, so the differences in ice discharge can be solely attributed to the differences in ice thickness at the flux gates. The total volumetric ice discharge for 2015–2017 ranges within 45–141 km 3 a −1 , depending on the ice-thickness model, with a mean of 87 ± 44 km 3 a −1 . The substantial differences between the ice-discharge results, and a multi-model normalized root-mean-squared deviation of 0.91 for the whole data set, reveal large differences and inconsistencies between the ice-thickness models, giving an indication of the large uncertainty in the current ice-discharge estimates for the APIS. This manifests a fundamental problem of the region: the scarcity of appropriate ice-thickness measurements and the difficulty of the current models to reconstruct the ice-thickness distribution in this complex region. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Ice Sheet Cambridge University Press Antarctic Antarctic Peninsula The Antarctic Annals of Glaciology 1 12 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The Antarctic Peninsula Ice Sheet (APIS) has become a significant contributor to sea-level rise over recent decades. Accurately estimating the ice discharge from the outlet glaciers of the APIS is crucial to quantify the mass balance of the Antarctic Peninsula. We here compute the ice discharge from the outlet glaciers of the APIS north of 70 ${^\circ }$ S for the five most widely used ice-thickness reconstructions, using a common surface velocity field and a common set of flux gates, so the differences in ice discharge can be solely attributed to the differences in ice thickness at the flux gates. The total volumetric ice discharge for 2015–2017 ranges within 45–141 km 3 a −1 , depending on the ice-thickness model, with a mean of 87 ± 44 km 3 a −1 . The substantial differences between the ice-discharge results, and a multi-model normalized root-mean-squared deviation of 0.91 for the whole data set, reveal large differences and inconsistencies between the ice-thickness models, giving an indication of the large uncertainty in the current ice-discharge estimates for the APIS. This manifests a fundamental problem of the region: the scarcity of appropriate ice-thickness measurements and the difficulty of the current models to reconstruct the ice-thickness distribution in this complex region. |
author2 |
Agencia Estatal de Investigación Elitenetzwerk Bayern Deutscher Akademischer Austauschdienst |
format |
Article in Journal/Newspaper |
author |
Shahateet, Kaian Navarro, Francisco Seehaus, Thorsten Fürst, Johannes J. Braun, Matthias |
spellingShingle |
Shahateet, Kaian Navarro, Francisco Seehaus, Thorsten Fürst, Johannes J. Braun, Matthias Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
author_facet |
Shahateet, Kaian Navarro, Francisco Seehaus, Thorsten Fürst, Johannes J. Braun, Matthias |
author_sort |
Shahateet, Kaian |
title |
Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
title_short |
Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
title_full |
Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
title_fullStr |
Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
title_full_unstemmed |
Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
title_sort |
estimating ice discharge of the antarctic peninsula using different ice-thickness datasets |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/aog.2023.67 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000678 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_source |
Annals of Glaciology volume 64, issue 91, page 121-132 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2023.67 |
container_title |
Annals of Glaciology |
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1 |
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12 |
_version_ |
1801373271493443584 |