Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets
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...
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ftdoajarticles:oai:doaj.org/article:69db53ceb91342f7a557f2a97de82675 2023-12-10T09:39:51+01:00 Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets Kaian Shahateet Francisco Navarro Thorsten Seehaus Johannes J. Fürst Matthias Braun https://doi.org/10.1017/aog.2023.67 https://doaj.org/article/69db53ceb91342f7a557f2a97de82675 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305523000678/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2023.67 0260-3055 1727-5644 https://doaj.org/article/69db53ceb91342f7a557f2a97de82675 Annals of Glaciology, Pp 1-12 Antarctic glaciology glacier discharge ice thickness measurements Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/aog.2023.67 2023-11-12T01:39:40Z 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 km3 a−1, depending on the ice-thickness model, with a mean of 87 ± 44 km3 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 Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula The Antarctic Annals of Glaciology 1 12 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology glacier discharge ice thickness measurements Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology glacier discharge ice thickness measurements Meteorology. Climatology QC851-999 Kaian Shahateet Francisco Navarro Thorsten Seehaus Johannes J. Fürst Matthias Braun Estimating ice discharge of the Antarctic Peninsula using different ice-thickness datasets |
topic_facet |
Antarctic glaciology glacier discharge ice thickness measurements Meteorology. Climatology QC851-999 |
description |
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 km3 a−1, depending on the ice-thickness model, with a mean of 87 ± 44 km3 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. |
format |
Article in Journal/Newspaper |
author |
Kaian Shahateet Francisco Navarro Thorsten Seehaus Johannes J. Fürst Matthias Braun |
author_facet |
Kaian Shahateet Francisco Navarro Thorsten Seehaus Johannes J. Fürst Matthias Braun |
author_sort |
Kaian Shahateet |
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 |
url |
https://doi.org/10.1017/aog.2023.67 https://doaj.org/article/69db53ceb91342f7a557f2a97de82675 |
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, Pp 1-12 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305523000678/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2023.67 0260-3055 1727-5644 https://doaj.org/article/69db53ceb91342f7a557f2a97de82675 |
op_doi |
https://doi.org/10.1017/aog.2023.67 |
container_title |
Annals of Glaciology |
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1 |
op_container_end_page |
12 |
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1784890214334857216 |