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A New High-resolution Depth Model for the Terre Adélie and George V Shelf and Margin, East Antarctica

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Created 13/01/2025

Updated 13/01/2025

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Abstract: The Collaborative East Antarctic Marine Census (CEAMARC) surveys to the Terre Adélie and George V shelf and margin highlight the requirement for a revised high resolution depth model that can be used as a spatial tool for improving physical models of the region. We have combined available shiptrack and multibeam bathymetry, coastline and land topographic data to develop a new high-resolution depth model, called GVdem. GVdem spans an area 138°E to 148°E longitude and 63°S to 69°S latitude, with a choice of three ESRI grids with cell pixel sizes: 15 arcsec, 9 arcsec and 3.6 arcsec. The revised depth model is an improvement over previously available regional-scale grids, and highlights seabed physiographic detail not previously observed for this part of East Antarctica. In particular, the extent and complexity of the inner-shelf depressions are revealed and their relationship with large shelf basins and adjacent flat-topped banks.

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Title A New High-resolution Depth Model for the Terre Adélie and George V Shelf and Margin, East Antarctica
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/7a34919e-70f4-4705-8309-53d98a8c088b
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[138.0, -69.0], [150.0, -69.0], [150.0, -64.0], [138.0, -64.0], [138.0, -69.0]]]}
Data Portal data.gov.au