Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat
Understanding grounding line dynamics is critical for projecting glacier evolution and sea level rise. Recent observations from satellite radar interferometry reveal rapid grounding line migration forced by oceanic tides that are several kilometers larger than predicted by hydrostatic equilibrium al...
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Online Access: | https://doi.org/10.5061/dryad.9kd51c5qv |
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ftzenodo:oai:zenodo.org:11196237 2024-09-15T18:07:41+00:00 Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat Ehrenfeucht, Shivani Rignot, Eric Morlighem, Mathieu 2024-05-15 https://doi.org/10.5061/dryad.9kd51c5qv unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.9kd51c5qv oai:zenodo.org:11196237 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Seawater intrusion Grounding line dynamics Ice-ocean interactions glacier retreat info:eu-repo/semantics/other 2024 ftzenodo https://doi.org/10.5061/dryad.9kd51c5qv 2024-07-26T03:35:06Z Understanding grounding line dynamics is critical for projecting glacier evolution and sea level rise. Recent observations from satellite radar interferometry reveal rapid grounding line migration forced by oceanic tides that are several kilometers larger than predicted by hydrostatic equilibrium alone, indicating that the transition from grounded to floating ice is more complex than previously thought. Recent studies suggest that seawater intrusions beneath grounded ice may play a role in glacier dynamics. Here, we investigate their impact on the evolution of Petermann Glacier, Greenland, using an ice sheet model. We compare the model results with observed changes in grounding line position, velocity, and ice elevation between 2010 and 2022. If we exclude seawater intrusions, the model requires anomalously high melt rates to replicate the retreat. Conversely, we match the observed retreat with 3-km-long seawater intrusions with a maximum ice shelf melt rate of 50~m/yr, consistent with observations. We also obtain more realistic glacier speedup and ice thinning when including seawater intrusions in the model. We conclude that seawater intrusions play a critical role in the dynamics of Petermann Glacier. Including them in glacier flow models will make glaciers more sensitive to ocean warming and increase projections of sea level rise. Funding provided by: National Aeronautics and Space Administration ROR ID: https://ror.org/027ka1x80 Award Number: 80NSSC20K1618 Other/Unknown Material glacier Greenland Ice Sheet Ice Shelf Petermann glacier Zenodo |
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Seawater intrusion Grounding line dynamics Ice-ocean interactions glacier retreat |
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Seawater intrusion Grounding line dynamics Ice-ocean interactions glacier retreat Ehrenfeucht, Shivani Rignot, Eric Morlighem, Mathieu Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
topic_facet |
Seawater intrusion Grounding line dynamics Ice-ocean interactions glacier retreat |
description |
Understanding grounding line dynamics is critical for projecting glacier evolution and sea level rise. Recent observations from satellite radar interferometry reveal rapid grounding line migration forced by oceanic tides that are several kilometers larger than predicted by hydrostatic equilibrium alone, indicating that the transition from grounded to floating ice is more complex than previously thought. Recent studies suggest that seawater intrusions beneath grounded ice may play a role in glacier dynamics. Here, we investigate their impact on the evolution of Petermann Glacier, Greenland, using an ice sheet model. We compare the model results with observed changes in grounding line position, velocity, and ice elevation between 2010 and 2022. If we exclude seawater intrusions, the model requires anomalously high melt rates to replicate the retreat. Conversely, we match the observed retreat with 3-km-long seawater intrusions with a maximum ice shelf melt rate of 50~m/yr, consistent with observations. We also obtain more realistic glacier speedup and ice thinning when including seawater intrusions in the model. We conclude that seawater intrusions play a critical role in the dynamics of Petermann Glacier. Including them in glacier flow models will make glaciers more sensitive to ocean warming and increase projections of sea level rise. Funding provided by: National Aeronautics and Space Administration ROR ID: https://ror.org/027ka1x80 Award Number: 80NSSC20K1618 |
format |
Other/Unknown Material |
author |
Ehrenfeucht, Shivani Rignot, Eric Morlighem, Mathieu |
author_facet |
Ehrenfeucht, Shivani Rignot, Eric Morlighem, Mathieu |
author_sort |
Ehrenfeucht, Shivani |
title |
Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
title_short |
Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
title_full |
Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
title_fullStr |
Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
title_full_unstemmed |
Data for: Seawater intrusions in the observed grounding zone of Petermann Glacier causes extensive retreat |
title_sort |
data for: seawater intrusions in the observed grounding zone of petermann glacier causes extensive retreat |
publisher |
Zenodo |
publishDate |
2024 |
url |
https://doi.org/10.5061/dryad.9kd51c5qv |
genre |
glacier Greenland Ice Sheet Ice Shelf Petermann glacier |
genre_facet |
glacier Greenland Ice Sheet Ice Shelf Petermann glacier |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.9kd51c5qv oai:zenodo.org:11196237 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.9kd51c5qv |
_version_ |
1810445060821483520 |