What is the global glacier ice volume outside the ice sheets?
Abstract A recent study (Millan and others, 2022 a , Nature Geoscience 15(2), 124–129) claims that ice volume contained in all glaciers outside the ice sheets and its potential contribution to sea level is 20% less than previously estimated. However, the apparent decrease is largely due to differenc...
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2023
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Online Access: | http://dx.doi.org/10.1017/jog.2023.1 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000011 |
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crcambridgeupr:10.1017/jog.2023.1 2024-06-23T07:47:03+00:00 What is the global glacier ice volume outside the ice sheets? Hock, Regine Maussion, Fabien Marzeion, Ben Nowicki, Sophie Aeronautics Research Mission Directorate Aeronautics Research Mission Directorate Norges Forskningsråd 2023 http://dx.doi.org/10.1017/jog.2023.1 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000011 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 273, page 204-210 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.1 2024-06-05T04:02:29Z Abstract A recent study (Millan and others, 2022 a , Nature Geoscience 15(2), 124–129) claims that ice volume contained in all glaciers outside the ice sheets and its potential contribution to sea level is 20% less than previously estimated. However, the apparent decrease is largely due to differences in choice of domain, as the study excludes 80% of the glacier area in the Antarctic periphery that was included in previous global glacier volume estimates. The issue highlights the difficulty in separating glaciers from the ice-sheet proper, especially in Antarctica, and the need for both the glacier and ice-sheet communities to develop standards and protocols to avoid double-counting in global ice volume and mass-change assessments and projections. Process-based inversion models have replaced earlier scaling methods, but large uncertainties in global glacier volume estimation remain due to the ill-posed nature of the inversion problem and poorly constrained parameters emphasizing the need for more direct ice thickness observations. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Cambridge University Press Antarctic The Antarctic Journal of Glaciology 69 273 204 210 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract A recent study (Millan and others, 2022 a , Nature Geoscience 15(2), 124–129) claims that ice volume contained in all glaciers outside the ice sheets and its potential contribution to sea level is 20% less than previously estimated. However, the apparent decrease is largely due to differences in choice of domain, as the study excludes 80% of the glacier area in the Antarctic periphery that was included in previous global glacier volume estimates. The issue highlights the difficulty in separating glaciers from the ice-sheet proper, especially in Antarctica, and the need for both the glacier and ice-sheet communities to develop standards and protocols to avoid double-counting in global ice volume and mass-change assessments and projections. Process-based inversion models have replaced earlier scaling methods, but large uncertainties in global glacier volume estimation remain due to the ill-posed nature of the inversion problem and poorly constrained parameters emphasizing the need for more direct ice thickness observations. |
author2 |
Aeronautics Research Mission Directorate Aeronautics Research Mission Directorate Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Hock, Regine Maussion, Fabien Marzeion, Ben Nowicki, Sophie |
spellingShingle |
Hock, Regine Maussion, Fabien Marzeion, Ben Nowicki, Sophie What is the global glacier ice volume outside the ice sheets? |
author_facet |
Hock, Regine Maussion, Fabien Marzeion, Ben Nowicki, Sophie |
author_sort |
Hock, Regine |
title |
What is the global glacier ice volume outside the ice sheets? |
title_short |
What is the global glacier ice volume outside the ice sheets? |
title_full |
What is the global glacier ice volume outside the ice sheets? |
title_fullStr |
What is the global glacier ice volume outside the ice sheets? |
title_full_unstemmed |
What is the global glacier ice volume outside the ice sheets? |
title_sort |
what is the global glacier ice volume outside the ice sheets? |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.1 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000011 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 273, page 204-210 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.1 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
273 |
container_start_page |
204 |
op_container_end_page |
210 |
_version_ |
1802650503531724800 |