Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data
Abstract The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data. O...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2023GL103815 https://doaj.org/article/97abf3f06e51441a8c2d55928bcf7e2e |
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ftdoajarticles:oai:doaj.org/article:97abf3f06e51441a8c2d55928bcf7e2e 2024-09-15T17:46:00+00:00 Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data Renata R. Constantino Kirsty J. Tinto 2023-06-01T00:00:00Z https://doi.org/10.1029/2023GL103815 https://doaj.org/article/97abf3f06e51441a8c2d55928bcf7e2e EN eng Wiley https://doi.org/10.1029/2023GL103815 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL103815 https://doaj.org/article/97abf3f06e51441a8c2d55928bcf7e2e Geophysical Research Letters, Vol 50, Iss 11, Pp n/a-n/a (2023) bathymetry east Antarctica ice shelves Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2023GL103815 2024-08-05T17:49:23Z Abstract The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data. Our model is constrained by few ship‐based seafloor measurements near the ice front and by ice‐base measurements over areas of grounded ice from radar data. Localized basins (∼1,400 m deep) are found beneath both ice shelves. The shallowest modeled bathymetry (∼200 m) represents the offshore extension of Cape Freshfield. Near the grounding line, seafloor depths are found to be deeper than the observed depth of the modified Circumpolar Deep water in the region (<350 m), key factor for basal melt analyses. From transit flight gravity anomalies, we suggest the relocation of the mapped edge of the continental shelf and a narrowing of the Cook Shelf Depression. Article in Journal/Newspaper Antarc* Antarctica Cook Ice Shelf East Antarctica Ice Shelf Ice Shelves Ninnis Glacier Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 11 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
bathymetry east Antarctica ice shelves Geophysics. Cosmic physics QC801-809 |
spellingShingle |
bathymetry east Antarctica ice shelves Geophysics. Cosmic physics QC801-809 Renata R. Constantino Kirsty J. Tinto Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
topic_facet |
bathymetry east Antarctica ice shelves Geophysics. Cosmic physics QC801-809 |
description |
Abstract The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data. Our model is constrained by few ship‐based seafloor measurements near the ice front and by ice‐base measurements over areas of grounded ice from radar data. Localized basins (∼1,400 m deep) are found beneath both ice shelves. The shallowest modeled bathymetry (∼200 m) represents the offshore extension of Cape Freshfield. Near the grounding line, seafloor depths are found to be deeper than the observed depth of the modified Circumpolar Deep water in the region (<350 m), key factor for basal melt analyses. From transit flight gravity anomalies, we suggest the relocation of the mapped edge of the continental shelf and a narrowing of the Cook Shelf Depression. |
format |
Article in Journal/Newspaper |
author |
Renata R. Constantino Kirsty J. Tinto |
author_facet |
Renata R. Constantino Kirsty J. Tinto |
author_sort |
Renata R. Constantino |
title |
Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
title_short |
Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
title_full |
Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
title_fullStr |
Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
title_full_unstemmed |
Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data |
title_sort |
cook ice shelf and ninnis glacier tongue bathymetry from inversion of operation ice bridge airborne gravity data |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2023GL103815 https://doaj.org/article/97abf3f06e51441a8c2d55928bcf7e2e |
genre |
Antarc* Antarctica Cook Ice Shelf East Antarctica Ice Shelf Ice Shelves Ninnis Glacier |
genre_facet |
Antarc* Antarctica Cook Ice Shelf East Antarctica Ice Shelf Ice Shelves Ninnis Glacier |
op_source |
Geophysical Research Letters, Vol 50, Iss 11, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2023GL103815 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL103815 https://doaj.org/article/97abf3f06e51441a8c2d55928bcf7e2e |
op_doi |
https://doi.org/10.1029/2023GL103815 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
11 |
_version_ |
1810493950810652672 |