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 data sets have turned out to contain various inconsistencies and inaccuracies. The goal of this...
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ftnerc:oai:nora.nerc.ac.uk:14092 2023-05-15T13:45:11+02:00 A consistent data set of Antarctic ice sheet topography, cavity geometry, and global bathymetry Timmermann, R. Le Brocq, A. Deen, Tara Domack, E. Dutrieux, Pierre Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, Keith Niederjasper, F. Nitsche, F. Nøst, O.A. Smedsrud, L.H. Smith, W.H.F. 2010 text http://nora.nerc.ac.uk/id/eprint/14092/ https://nora.nerc.ac.uk/id/eprint/14092/1/essdd-3-231-2010.pdf en eng Copernicus Publications https://nora.nerc.ac.uk/id/eprint/14092/1/essdd-3-231-2010.pdf Timmermann, R.; Le Brocq, A.; Deen, Tara; Domack, E.; Dutrieux, Pierre orcid:0000-0002-8066-934X Galton-Fenzi, B.; Hellmer, H.; Humbert, A.; Jansen, D.; Jenkins, Adrian orcid:0000-0002-9117-0616 Lambrecht, A.; Makinson, Keith orcid:0000-0002-5791-1767 Niederjasper, F.; Nitsche, F.; Nøst, O.A.; Smedsrud, L.H.; 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). 261-273. https://doi.org/10.5194/essdd-3-231-2010 <https://doi.org/10.5194/essdd-3-231-2010> Marine Sciences Glaciology Publication - Article NonPeerReviewed 2010 ftnerc https://doi.org/10.5194/essdd-3-231-2010 2023-02-04T19:29:01Z 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 data sets have turned out to contain various inconsistencies and inaccuracies. The goal of this work is to compile independent regional fields 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 get the best out of each data set. 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 topography data set (RTopo-1) contains maps for upper and lower ice surface heights, bedrock topography, and consistent masks for open ocean, grounded ice, floating ice, and bare land surface. Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier Natural Environment Research Council: NERC Open Research Archive 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 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Glaciology |
spellingShingle |
Marine Sciences Glaciology Timmermann, R. Le Brocq, A. Deen, Tara Domack, E. Dutrieux, Pierre Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, Keith 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 |
Marine Sciences Glaciology |
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 data sets have turned out to contain various inconsistencies and inaccuracies. The goal of this work is to compile independent regional fields 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 get the best out of each data set. 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 topography data set (RTopo-1) contains maps for upper and lower ice surface heights, bedrock topography, and consistent masks for open ocean, grounded ice, floating ice, and bare land surface. |
format |
Article in Journal/Newspaper |
author |
Timmermann, R. Le Brocq, A. Deen, Tara Domack, E. Dutrieux, Pierre Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, Keith Niederjasper, F. Nitsche, F. Nøst, O.A. Smedsrud, L.H. Smith, W.H.F. |
author_facet |
Timmermann, R. Le Brocq, A. Deen, Tara Domack, E. Dutrieux, Pierre Galton-Fenzi, B. Hellmer, H. Humbert, A. Jansen, D. Jenkins, Adrian Lambrecht, A. Makinson, Keith 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 |
http://nora.nerc.ac.uk/id/eprint/14092/ https://nora.nerc.ac.uk/id/eprint/14092/1/essdd-3-231-2010.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://nora.nerc.ac.uk/id/eprint/14092/1/essdd-3-231-2010.pdf Timmermann, R.; Le Brocq, A.; Deen, Tara; Domack, E.; Dutrieux, Pierre orcid:0000-0002-8066-934X Galton-Fenzi, B.; Hellmer, H.; Humbert, A.; Jansen, D.; Jenkins, Adrian orcid:0000-0002-9117-0616 Lambrecht, A.; Makinson, Keith orcid:0000-0002-5791-1767 Niederjasper, F.; Nitsche, F.; Nøst, O.A.; Smedsrud, L.H.; 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). 261-273. https://doi.org/10.5194/essdd-3-231-2010 <https://doi.org/10.5194/essdd-3-231-2010> |
op_doi |
https://doi.org/10.5194/essdd-3-231-2010 |
_version_ |
1766215674957398016 |