Coastal bathymetry in central Dronning Maud Land controls ice shelf stability
Abstract Knowledge of the bathymetry of Antarctica’s margins is crucial for models and interpretations of ice-ocean interactions and their influence on ongoing and future sea level change, but remains patchy where ice shelves and multi-year sea ice block measurements. Here, we present a bathymetric...
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ftdoajarticles:oai:doaj.org/article:a181ae31c3da4cf6a7404232a2c1ad80 2024-02-27T08:35:18+00:00 Coastal bathymetry in central Dronning Maud Land controls ice shelf stability H. Eisermann G. Eagles W. Jokat 2024-01-01T00:00:00Z https://doi.org/10.1038/s41598-024-51882-2 https://doaj.org/article/a181ae31c3da4cf6a7404232a2c1ad80 EN eng Nature Portfolio https://doi.org/10.1038/s41598-024-51882-2 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-024-51882-2 2045-2322 https://doaj.org/article/a181ae31c3da4cf6a7404232a2c1ad80 Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024) Medicine R Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41598-024-51882-2 2024-01-28T02:24:50Z Abstract Knowledge of the bathymetry of Antarctica’s margins is crucial for models and interpretations of ice-ocean interactions and their influence on ongoing and future sea level change, but remains patchy where ice shelves and multi-year sea ice block measurements. Here, we present a bathymetric model for the central Dronning Maud Land margin, based on a constrained inversion of airborne gravity data. It shows the cavities beneath the region’s two ice shelves to be much deeper than in existing bathymetric compilations, but to be shielded from Warm Deep Water ingress and basal melting by the presence of shallow bathymetric sills along the continental shelf. Over areas of multi-year sea ice, the model returns bathymetric estimates of similar accuracy to gravity interpolation-based methods over open water. Airborne gravity thus presents an opportunity to bathymetrically map hundreds of thousands of square kilometres of the most inaccessible margins of Antarctica at resolutions adequate for regional and global oceanographic and glaciological modelling and interpretation. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land Ice Shelf Ice Shelves Sea ice Directory of Open Access Journals: DOAJ Articles Dronning Maud Land Scientific Reports 14 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q H. Eisermann G. Eagles W. Jokat Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
topic_facet |
Medicine R Science Q |
description |
Abstract Knowledge of the bathymetry of Antarctica’s margins is crucial for models and interpretations of ice-ocean interactions and their influence on ongoing and future sea level change, but remains patchy where ice shelves and multi-year sea ice block measurements. Here, we present a bathymetric model for the central Dronning Maud Land margin, based on a constrained inversion of airborne gravity data. It shows the cavities beneath the region’s two ice shelves to be much deeper than in existing bathymetric compilations, but to be shielded from Warm Deep Water ingress and basal melting by the presence of shallow bathymetric sills along the continental shelf. Over areas of multi-year sea ice, the model returns bathymetric estimates of similar accuracy to gravity interpolation-based methods over open water. Airborne gravity thus presents an opportunity to bathymetrically map hundreds of thousands of square kilometres of the most inaccessible margins of Antarctica at resolutions adequate for regional and global oceanographic and glaciological modelling and interpretation. |
format |
Article in Journal/Newspaper |
author |
H. Eisermann G. Eagles W. Jokat |
author_facet |
H. Eisermann G. Eagles W. Jokat |
author_sort |
H. Eisermann |
title |
Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
title_short |
Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
title_full |
Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
title_fullStr |
Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
title_full_unstemmed |
Coastal bathymetry in central Dronning Maud Land controls ice shelf stability |
title_sort |
coastal bathymetry in central dronning maud land controls ice shelf stability |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41598-024-51882-2 https://doaj.org/article/a181ae31c3da4cf6a7404232a2c1ad80 |
geographic |
Dronning Maud Land |
geographic_facet |
Dronning Maud Land |
genre |
Antarc* Antarctica Dronning Maud Land Ice Shelf Ice Shelves Sea ice |
genre_facet |
Antarc* Antarctica Dronning Maud Land Ice Shelf Ice Shelves Sea ice |
op_source |
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024) |
op_relation |
https://doi.org/10.1038/s41598-024-51882-2 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-024-51882-2 2045-2322 https://doaj.org/article/a181ae31c3da4cf6a7404232a2c1ad80 |
op_doi |
https://doi.org/10.1038/s41598-024-51882-2 |
container_title |
Scientific Reports |
container_volume |
14 |
container_issue |
1 |
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1792041782939222016 |