A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry
Sub-ice shelf circulation and freezing/melting rates in ocean general circulation models depend critically on an accurate and consistent representation of cavity geometry. Existing global or pan-Antarctic topography data sets have turned out to contain various inconsistencies and inaccuracies. The g...
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Format: | Article in Journal/Newspaper |
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/46009/ https://doi.org/10.5194/essd-2-261-2010 https://nrl.northumbria.ac.uk/id/eprint/46009/1/essd-2-261-2010.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:46009 2023-05-15T13:44:52+02:00 A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry Timmermann, R. Le Brocq, A. Deen, T. Domack, E. Dutrieux, P. Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, K. Niederjasper, F. Nitsche, F. Nøst, O. A. Smedsrud, L. H. Smith, W. H. F. 2010-12-22 text https://nrl.northumbria.ac.uk/id/eprint/46009/ https://doi.org/10.5194/essd-2-261-2010 https://nrl.northumbria.ac.uk/id/eprint/46009/1/essd-2-261-2010.pdf en eng Copernicus Publications https://nrl.northumbria.ac.uk/id/eprint/46009/1/essd-2-261-2010.pdf Timmermann, R., Le Brocq, A., Deen, T., Domack, E., Dutrieux, P., Galton-Fenzi, B., Hellmer, H., Humbert, A., Jansen, D., Jenkins, Adrian, Lambrecht, A., Makinson, K., Niederjasper, F., Nitsche, F., Nøst, O. A., Smedsrud, L. H. and Smith, W. H. F. (2010) A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry. Earth System Science Data, 2 (2). pp. 261-273. ISSN 1866-3516 cc_by CC-BY F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2010 ftunivnorthumb https://doi.org/10.5194/essd-2-261-2010 2022-09-25T06:13:44Z Sub-ice shelf circulation and freezing/melting rates in ocean general circulation models depend critically on an accurate and consistent representation of cavity geometry. Existing global or pan-Antarctic topography data sets have turned out to contain various inconsistencies and inaccuracies. The goal of this work is to compile independent regional surveys and maps into a global data set. We use the S-2004 global 1-min bathymetry as the backbone and add an improved version of the BEDMAP topography (ALBMAP bedrock topography) for an area that roughly coincides with the Antarctic continental shelf. The position of the merging line is individually chosen in different sectors in order to capture the best of both data sets. High-resolution gridded data for ice shelf topography and cavity geometry of the Amery, Fimbul, Filchner-Ronne, Larsen C and George VI Ice Shelves, and for Pine Island Glacier are carefully merged into the ambient ice and ocean topographies. Multibeam survey data for bathymetry in the former Larsen B cavity and the southeastern Bellingshausen Sea have been obtained from the data centers of Alfred Wegener Institute (AWI), British Antarctic Survey (BAS) and Lamont-Doherty Earth Observatory (LDEO), gridded, and blended into the existing bathymetry map. The resulting global 1-min Refined Topography data set (RTopo-1) contains self-consistent maps for upper and lower ice surface heights, bedrock topography, and surface type (open ocean, grounded ice, floating ice, bare land surface). The data set is available in NetCDF format from the PANGAEA database at doi:10.1594/pangaea.741917. Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Antarctic Bellingshausen Sea Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic Earth System Science Data 2 2 261 273 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Timmermann, R. Le Brocq, A. Deen, T. Domack, E. Dutrieux, P. Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, K. Niederjasper, F. Nitsche, F. Nøst, O. A. Smedsrud, L. H. Smith, W. H. F. A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Sub-ice shelf circulation and freezing/melting rates in ocean general circulation models depend critically on an accurate and consistent representation of cavity geometry. Existing global or pan-Antarctic topography data sets have turned out to contain various inconsistencies and inaccuracies. The goal of this work is to compile independent regional surveys and maps into a global data set. We use the S-2004 global 1-min bathymetry as the backbone and add an improved version of the BEDMAP topography (ALBMAP bedrock topography) for an area that roughly coincides with the Antarctic continental shelf. The position of the merging line is individually chosen in different sectors in order to capture the best of both data sets. High-resolution gridded data for ice shelf topography and cavity geometry of the Amery, Fimbul, Filchner-Ronne, Larsen C and George VI Ice Shelves, and for Pine Island Glacier are carefully merged into the ambient ice and ocean topographies. Multibeam survey data for bathymetry in the former Larsen B cavity and the southeastern Bellingshausen Sea have been obtained from the data centers of Alfred Wegener Institute (AWI), British Antarctic Survey (BAS) and Lamont-Doherty Earth Observatory (LDEO), gridded, and blended into the existing bathymetry map. The resulting global 1-min Refined Topography data set (RTopo-1) contains self-consistent maps for upper and lower ice surface heights, bedrock topography, and surface type (open ocean, grounded ice, floating ice, bare land surface). The data set is available in NetCDF format from the PANGAEA database at doi:10.1594/pangaea.741917. |
format |
Article in Journal/Newspaper |
author |
Timmermann, R. Le Brocq, A. Deen, T. Domack, E. Dutrieux, P. Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, K. Niederjasper, F. Nitsche, F. Nøst, O. A. Smedsrud, L. H. Smith, W. H. F. |
author_facet |
Timmermann, R. Le Brocq, A. Deen, T. Domack, E. Dutrieux, P. Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, K. Niederjasper, F. Nitsche, F. Nøst, O. A. Smedsrud, L. H. Smith, W. H. F. |
author_sort |
Timmermann, R. |
title |
A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
title_short |
A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
title_full |
A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
title_fullStr |
A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
title_full_unstemmed |
A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry |
title_sort |
consistent data set of antarctic ice sheet topography, cavity geometry, and global bathymetry |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://nrl.northumbria.ac.uk/id/eprint/46009/ https://doi.org/10.5194/essd-2-261-2010 https://nrl.northumbria.ac.uk/id/eprint/46009/1/essd-2-261-2010.pdf |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amery Antarctic Bellingshausen Sea Pine Island Glacier The Antarctic |
geographic_facet |
Amery Antarctic Bellingshausen Sea Pine Island Glacier The Antarctic |
genre |
Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
genre_facet |
Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/46009/1/essd-2-261-2010.pdf Timmermann, R., Le Brocq, A., Deen, T., Domack, E., Dutrieux, P., Galton-Fenzi, B., Hellmer, H., Humbert, A., Jansen, D., Jenkins, Adrian, Lambrecht, A., Makinson, K., Niederjasper, F., Nitsche, F., Nøst, O. A., Smedsrud, L. H. and Smith, W. H. F. (2010) A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry. Earth System Science Data, 2 (2). pp. 261-273. ISSN 1866-3516 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/essd-2-261-2010 |
container_title |
Earth System Science Data |
container_volume |
2 |
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2 |
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261 |
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273 |
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1766207863762452480 |