Bedmap2: improved ice bed, surface and thickness datasets for Antarctica

• Published in: The Cryosphere
• Main Authors: Fretwell, P., Pritchard, H. D., Vaughan, D. G., Bamber, J. L., Barrand, N. E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D. D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A. J., Corr, H. F. J., Damaske, D., Damm, V., Ferraccioli, F., Forsberg, R., Fujita, S., Gim, Y., Gogineni, P., Griggs, J. A., Hindmarsh, R. C. A., Holmlund, P., Holt, J. W., Jacobel, R. W., Jenkins, A., Jokat, W., Jordan, T., King, E. C., Kohler, J., Krabill, W., Riger-Kusk, M., Langley, K. A., Leitchenkov, G., Leuschen, C., Luyendyk, B. P., Matsuoka, K., Mouginot, J., Nitsche, F. O., Nogi, Y., Nost, O. A., Popov, S. V., Rignot, E., Rippin, D. M., Rivera, A., Roberts, J., Ross, N., Siegert, M. J., Smith, A. M., Steinhage, D., Studinger, M., Sun, B., Tinto, B. K., Welch, B. C., Wilson, D., Young, D. A., Xiangbin, C., Zirizzotti, A.
• Other Authors: Fretwell, P.; British Antarctic Survey, Cambridge, UK, Pritchard, H. D.; British Antarctic Survey, Cambridge, UK, Vaughan, D. G.; British Antarctic Survey, Cambridge, UK, Bamber, J. L.; School of Geographical Sciences, University of Bristol, UK, Barrand, N. E.; British Antarctic Survey, Cambridge, UK, Bell, R.; Lamont-Doherty Earth Observatory of Columbia University, Palisades, USA, Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Bingham, R. G.; School of Geosciences, University of Aberdeen, UK, Blankenship, D. D.; Institute for Geophysics, University of Texas at Austin, USA, Casassa, G.; Centro de Estudios Cientificos, Santiago, Chile, Catania, G.; Institute for Geophysics, University of Texas at Austin, USA, Callens, D.; Laboratoire de Glaciologie, Universit´e Libre de Bruxelles, Brussels, Belgium, Conway, H.; Earth and Space Sciences, University of Washington, Seattle, USA, Cook, A. J.; Department of Geography, Swansea University, Swansea, UK, Corr, H. F. J.; British Antarctic Survey, Cambridge, UK, Damaske, D.; Federal Institute for Geosciences and Natural Resources, Hannover, Germany, Damm, V.; Federal Institute for Geosciences and Natural Resources, Hannover, Germany, Ferraccioli, F.; British Antarctic Survey, Cambridge, UK, Forsberg, R.; National Space Institute, Technical University of Denmark, Denmark, Fujita, S.; National Institute of Polar Research, Tokyo, Japan, Gim, Y.; Jet Propulsion Laboratory. California Institute of Technology, Pasadena, USA, Gogineni, P.; Electrical Engineering & Computer Science, University of Kansas, Lawrence, USA, Griggs, J. A.; School of Geographical Sciences, University of Bristol, UK, Hindmarsh, R. C. A.; British Antarctic Survey, Cambridge, UK, Holmlund, P.; Stockholm University, Stockholm, Sweden, Holt, J. W.; Institute for Geophysics, University of Texas at Austin, USA, Jacobel, R. W.; St. Olaf College, Northfield, MN 55057, USA, Jenkins, A.; British Antarctic Survey, Cambridge, UK, Jokat, W.; Alfred Wegener Institute, Bremerhaven, Germany, Jordan, T.; British Antarctic Survey, Cambridge, UK, King, E. C.; British Antarctic Survey, Cambridge, UK, Kohler, J.; Norwegian Polar Institute, Fram Centre, Tromsø, Norway, Krabill, W.; NASA Wallops Flight Facility, Virginia, USA, Riger-Kusk, M.; College of Science, University of Canterbury, Christchurch, New Zealand, Langley, K. A.; Department of Geosciences, University of Oslo, Norway, Leitchenkov, G.; Institute for Geology and Mineral Resources of the World Ocean, St.-Petersburg, Russia, Leuschen, C.; Electrical Engineering & Computer Science, University of Kansas, Lawrence, USA, Luyendyk, B. P.; Earth Research Institute, University of California in Santa Barbara, USA, Matsuoka, K.; Norwegian Polar Institute, Tromso, Norway, Mouginot, J.; Department of Earth System Science, University of California, Irvine, USA, Nitsche, F. O.; Lamont-Doherty Earth Observatory of Columbia University, Palisades, USA, Nogi, Y.; National Institute of Polar Research, Tokyo, Japan, Nost, O. A.; Norwegian Polar Institute, Tromso, Norway, Popov, S. V.; Polar Marine Geosurvey Expedition, St.-Petersburg, Russia, Rignot, E.; School of Physical Sciences, University of California, Irvine, USA, Rippin, D. M.; Environment Department, University of York, Heslington, York, YO10 5DD, UK, Rivera, A.; Centro de Estudios Cientificos, Santiago, Chile, Roberts, J.; Department of Sustainability, Environment, Water, Population and Communities, Australian Antarctic Division, Hobart, Tasmania, Australia, Ross, N.; School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK, Siegert, M. J.; School of Geographical Sciences, University of Bristol, UK
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Gesellschaft GMBH 2013
• Subjects: Antarctic bedrock topography; Antarctic mass balance; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate; 02. Cryosphere::02.02. Glaciers::02.02.04. Ice; 02. Cryosphere::02.02. Glaciers::02.02.05. Ice dynamics; 02. Cryosphere::02.02. Glaciers::02.02.06. Mass balance; Antarctic; The Antarctic; Antarc*; Antarctica; Arctic; Ice Sheet; Polar Research; The Cryosphere
• Online Access: http://hdl.handle.net/2122/8533; http://www.the-cryosphere.net/7/375/2013/; https://doi.org/10.5194/tc-7-375-2013

We present Bedmap2, a new suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of the Antarctic south of 60 S. We derived these products using data from a variety of sources, including many substantial surveys completed since the original Bedmap compilation (Bedmap1) in 2001. In particular, the Bedmap2 ice thickness grid is made from 25 million measurements, over two orders of magnitude more than were used in Bedmap1. In most parts of Antarctica the subglacial landscape is visible in much greater detail than was previously available and the improved datacoverage has in many areas revealed the full scale of mountain ranges, valleys, basins and troughs, only fragments of which were previously indicated in local surveys. The derived statistics for Bedmap2 show that the volume of ice contained in the Antarctic ice sheet (27 million km3) and its potential contribution to sea-level rise (58 m) are similar to those of Bedmap1, but the mean thickness of the ice sheet is 4.6% greater, the mean depth of the bed beneath the grounded ice sheet is 72m lower and the area of ice sheet grounded on bed below sea level is increased by 10 %. The Bedmap2 compilation highlights several areas beneath the ice sheet where the bed elevation is substantially lower than the deepest bed indicated by Bedmap1. These products, along with grids of data coverage and uncertainty, provide new opportunities for detailed modelling of the past and future evolution of the Antarctic ice sheets. Published 375–393 1.8. Osservazioni di geofisica ambientale 3.8. Geofisica per l'ambiente JCR Journal open