Antarctic ice sheet topography, cavity geometry, and global bathymetry (RTopo 1.0.5-beta) ...

• Main Authors: Timmermann, Ralph, Le Brocq, Anne M, Deen, Tara J, Domack, Eugene W, Dutrieux, Pierre, Galton-Fenzi, Ben, Hellmer, Hartmut H, Humbert, Angelika, Jansen, Daniela, Jenkins, Adrian, Lambrecht, Astrid, Makinson, Keith, Niederjasper, Fred, Nitsche, Frank-Oliver, Nøst, Ole Anders, Smedsrud, Lars Henrik, Smith, Walter
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: RTopo; RTopo-1; Comment; File size; File format; Uniform resource locator/link to file; ice2sea ice2sea; Ocean Dynamics @ AWI AWI_OceDyn; Antarc*; Antarctic; Ice Sheet; Ice Shelf; Ice Shelves; Pine Island Glacier
• Online Access: https://dx.doi.org/10.1594/pangaea.741917; https://doi.pangaea.de/10.1594/PANGAEA.741917

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-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 upper and lower ice surface topography and cavity geometry of 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 survey data for bathymetry in the former Larsen B cavity and the southeastern ... : To enable communication with RTopo-1 users, the author would appreciate a notification when using the dataset or errors are found. ...