Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica
Ice shelf basal melting is the primary mechanism driving mass loss from the Antarctic Ice Sheet, yet it is unknown how the localized melt enhancement from subglacial discharge will affect future Antarctic glacial retreat. We develop a parameterization of ice shelf basal melt that accounts for both o...
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craaas:10.1126/sciadv.adi9014 2024-06-09T07:39:52+00:00 Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica Pelle, Tyler Greenbaum, Jamin S. Dow, Christine F. Jenkins, Adrian Morlighem, Mathieu 2023 http://dx.doi.org/10.1126/sciadv.adi9014 https://www.science.org/doi/pdf/10.1126/sciadv.adi9014 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 43 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.adi9014 2024-05-16T12:53:46Z Ice shelf basal melting is the primary mechanism driving mass loss from the Antarctic Ice Sheet, yet it is unknown how the localized melt enhancement from subglacial discharge will affect future Antarctic glacial retreat. We develop a parameterization of ice shelf basal melt that accounts for both ocean and subglacial discharge forcing and apply it in future projections of Denman and Scott Glaciers, East Antarctica, through 2300. In forward simulations, subglacial discharge accelerates the onset of retreat of these systems into the deepest continental trench on Earth by 25 years. During this retreat, Denman Glacier alone contributes 0.33 millimeters per year to global sea level rise, comparable to half of the contemporary sea level contribution of the entire Antarctic Ice Sheet. Our results stress the importance of resolving complex interactions between the ice, ocean, and subglacial environments in future Antarctic Ice Sheet projections. Article in Journal/Newspaper Antarc* Antarctic Antarctica Denman Glacier East Antarctica Ice Sheet Ice Shelf AAAS Resource Center (American Association for the Advancement of Science) Antarctic The Antarctic East Antarctica Denman Glacier ENVELOPE(99.417,99.417,-66.750,-66.750) Science Advances 9 43 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Ice shelf basal melting is the primary mechanism driving mass loss from the Antarctic Ice Sheet, yet it is unknown how the localized melt enhancement from subglacial discharge will affect future Antarctic glacial retreat. We develop a parameterization of ice shelf basal melt that accounts for both ocean and subglacial discharge forcing and apply it in future projections of Denman and Scott Glaciers, East Antarctica, through 2300. In forward simulations, subglacial discharge accelerates the onset of retreat of these systems into the deepest continental trench on Earth by 25 years. During this retreat, Denman Glacier alone contributes 0.33 millimeters per year to global sea level rise, comparable to half of the contemporary sea level contribution of the entire Antarctic Ice Sheet. Our results stress the importance of resolving complex interactions between the ice, ocean, and subglacial environments in future Antarctic Ice Sheet projections. |
format |
Article in Journal/Newspaper |
author |
Pelle, Tyler Greenbaum, Jamin S. Dow, Christine F. Jenkins, Adrian Morlighem, Mathieu |
spellingShingle |
Pelle, Tyler Greenbaum, Jamin S. Dow, Christine F. Jenkins, Adrian Morlighem, Mathieu Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
author_facet |
Pelle, Tyler Greenbaum, Jamin S. Dow, Christine F. Jenkins, Adrian Morlighem, Mathieu |
author_sort |
Pelle, Tyler |
title |
Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
title_short |
Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
title_full |
Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
title_fullStr |
Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
title_full_unstemmed |
Subglacial discharge accelerates future retreat of Denman and Scott Glaciers, East Antarctica |
title_sort |
subglacial discharge accelerates future retreat of denman and scott glaciers, east antarctica |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.adi9014 https://www.science.org/doi/pdf/10.1126/sciadv.adi9014 |
long_lat |
ENVELOPE(99.417,99.417,-66.750,-66.750) |
geographic |
Antarctic The Antarctic East Antarctica Denman Glacier |
geographic_facet |
Antarctic The Antarctic East Antarctica Denman Glacier |
genre |
Antarc* Antarctic Antarctica Denman Glacier East Antarctica Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Denman Glacier East Antarctica Ice Sheet Ice Shelf |
op_source |
Science Advances volume 9, issue 43 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adi9014 |
container_title |
Science Advances |
container_volume |
9 |
container_issue |
43 |
_version_ |
1801382595083108352 |