RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry
Sub-ice shelf circulation and freezing/melting rates depend critically on an accurate and consistent representation of cavity geometry (i.e. ice-shelf draft and ocean bathymetry). Existing global or pan-Antarctic data sets have turned out to contain various inconsistencies and inaccuracies. The goal...
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ftawi:oai:epic.awi.de:30738 2023-05-15T13:46:52+02:00 RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry Timmermann, Ralph 2010-05-06 https://epic.awi.de/id/eprint/30738/ http://meetingorganizer.copernicus.org/EGU2010/EGU2010-5304-1.pdf https://hdl.handle.net/10013/epic.39674 unknown Geophysical Research Abstracts Timmermann, R. (2010) RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry , EGU General Assembly 2010, Vienna, 2 May 2010 - 7 May 2010 . hdl:10013/epic.39674 EPIC3EGU General Assembly 2010, Vienna, 2010-05-02-2010-05-07Vol. 12, EGU2010-5304-1, 2010, Geophysical Research Abstracts Conference notRev 2010 ftawi 2021-12-24T15:37:49Z Sub-ice shelf circulation and freezing/melting rates depend critically on an accurate and consistent representation of cavity geometry (i.e. ice-shelf draft and ocean bathymetry). 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-minute bathymetry as the backbone and add an improved version of the BEDMAP topography for an area that roughly coincides with the Antarctic continental shelf. Locations of the merging line have been carefully adjusted in order to get the best out of each data set. High-resolution gridded data for the Amery, Fimbul, Filchner-Ronne, Larsen C and George VI Ice Shelves and for Pine Island Glacier have been carefully merged into the ambient ice and ocean topographies. Multibeam ship 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 again carefully merged into the existing bathymetry map. The resulting global 1-minute data set contains consistent masks for open ocean, grounded ice, floating ice, and bare land surface. The Ice Shelf Cavern Geometry Team: Anne Le Brocq, Tara Deen, Eugene Domack, Pierre Dutrieux, Ben Galton-Fenzi, Dorothea Graffe, Hartmut Hellmer, Angelika Humbert, Daniela Jansen, Adrian Jenkins, Astrid Lambrecht, Keith Makinson, Fred Niederjasper, Frank Nitsche, Ole Anders Nøst, Lars Henrik Smedsrud, and Walter Smith Conference Object Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Shelf Ice Shelves Pine Island Glacier Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Bellingshausen Sea Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
Sub-ice shelf circulation and freezing/melting rates depend critically on an accurate and consistent representation of cavity geometry (i.e. ice-shelf draft and ocean bathymetry). 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-minute bathymetry as the backbone and add an improved version of the BEDMAP topography for an area that roughly coincides with the Antarctic continental shelf. Locations of the merging line have been carefully adjusted in order to get the best out of each data set. High-resolution gridded data for the Amery, Fimbul, Filchner-Ronne, Larsen C and George VI Ice Shelves and for Pine Island Glacier have been carefully merged into the ambient ice and ocean topographies. Multibeam ship 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 again carefully merged into the existing bathymetry map. The resulting global 1-minute data set contains consistent masks for open ocean, grounded ice, floating ice, and bare land surface. The Ice Shelf Cavern Geometry Team: Anne Le Brocq, Tara Deen, Eugene Domack, Pierre Dutrieux, Ben Galton-Fenzi, Dorothea Graffe, Hartmut Hellmer, Angelika Humbert, Daniela Jansen, Adrian Jenkins, Astrid Lambrecht, Keith Makinson, Fred Niederjasper, Frank Nitsche, Ole Anders Nøst, Lars Henrik Smedsrud, and Walter Smith |
format |
Conference Object |
author |
Timmermann, Ralph |
spellingShingle |
Timmermann, Ralph RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
author_facet |
Timmermann, Ralph |
author_sort |
Timmermann, Ralph |
title |
RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
title_short |
RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
title_full |
RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
title_fullStr |
RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
title_full_unstemmed |
RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry |
title_sort |
rtopo-1: a consistent dataset for antarctic ice shelf topography and global ocean bathymetry |
publisher |
Geophysical Research Abstracts |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/30738/ http://meetingorganizer.copernicus.org/EGU2010/EGU2010-5304-1.pdf https://hdl.handle.net/10013/epic.39674 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic The Antarctic Bellingshausen Sea Amery Pine Island Glacier |
geographic_facet |
Antarctic The Antarctic Bellingshausen Sea Amery Pine Island Glacier |
genre |
Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Shelf Ice Shelves Pine Island Glacier |
genre_facet |
Antarc* Antarctic Bellingshausen Sea British Antarctic Survey Ice Shelf Ice Shelves Pine Island Glacier |
op_source |
EPIC3EGU General Assembly 2010, Vienna, 2010-05-02-2010-05-07Vol. 12, EGU2010-5304-1, 2010, Geophysical Research Abstracts |
op_relation |
Timmermann, R. (2010) RTOPO-1: A consistent dataset for Antarctic ice shelf topography and global ocean bathymetry , EGU General Assembly 2010, Vienna, 2 May 2010 - 7 May 2010 . hdl:10013/epic.39674 |
_version_ |
1766245468238512128 |