Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica
Hamish D. Pritchard, Peter T. Fretwell, Alice Frémand, Julien A. Bodart, James D. Kirkham, Alan Aitken, Jonathan Bamber, Robin E. Bell, C. Bianchi, Robert G. Bingham, Donald D. Blankenship, Gino Casassa, Knut Christianson, H. Conway, Hugh F. J. Corr, Xiangbin Cui, Detlef Damaske, Volkmar Damm, Boris Dorschel, Reinhard Drews, Graeme Eagles, Olaf Eisen, Hannes Eisermann, Fausto Ferraccioli, Elena Field, R. Forsberg, Steven Franke, Vikram Goel, Siva Prasad Gogineni, Jamin S. Greenbaum, Benjamin Hills, Richard C. A. Hindmarsh, Andrew O. Hoffman, Nicholas Holschuh, J. W. Holt, Angelika Humbert, R. W. Jacobel, Daniela Jansen, Adrian Jenkins, Wilfried Jokat, Lenneke M. Jong, Tom A. Jordan, Edward C. King, Jack Kohler, William Krabill, Joséphine Maton, Mette Kusk Gillespie, K. Langley, Joohan Lee, German Leitchenkov, C. Leuschen, Bruce P. Luyendyk, Joseph A. MacGregor, Emma MacKie, Geir Moholdt, Kenichi Matsuoka, Mathieu Morlighem, J. Mouginot, F. O. Nitsche, Ole Anders Nøst, John Paden, Frank Pattyn, С. В. Попов, Eric Rignot, David M. Rippin, Andrés Rivera, Jason L. Roberts, Neil Ross, Antonia Ruppel, Dustin M. Schroeder, Martín J. Siegert, Andrew M. Smith, Daniel Steinhage, M. Studinger, Bо Sun, Ignazio Tabacco, K. J. Tinto, Stefano Urbini, David G. Vaughan, Douglas S. Wilson, D. A. Young, A. Zirizzotti
Abstract
We present Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of the Antarctic south of 60 °S. Bedmap3 incorporates and adds to all post-1950s datasets previously used for Bedmap2, including 84 new aero-geophysical surveys by 15 data providers, an additional 52 million data points and 1.9 million line-kilometres of measurement. These efforts have filled notable gaps including in major mountain ranges and the deep interior of East Antarctica, along West Antarctic coastlines and on the Antarctic Peninsula. Our new Bedmap3/RINGS grounding line similarly consolidates multiple recent mappings into a single, spatially coherent feature. Combined with updated maps of surface topography, ice shelf thickness, rock outcrops and bathymetry, Bedmap3 reveals in much greater detail the subglacial landscape and distribution of Antarctica's ice, providing new opportunities to interpret continental-scale landscape evolution and to model the past and future evolution of the Antarctic ice sheets.