Articles | Volume 7, issue 1
https://doi.org/10.5194/tc-7-375-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-7-375-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
28 Feb 2013
Research article |
| 28 Feb 2013
Bedmap2: improved ice bed, surface and thickness datasets for Antarctica
P. Fretwell
British Antarctic Survey, Cambridge, UK
H. D. Pritchard
British Antarctic Survey, Cambridge, UK
D. G. Vaughan
British Antarctic Survey, Cambridge, UK
J. L. Bamber
School of Geographical Sciences, University of Bristol, UK
N. E. Barrand
British Antarctic Survey, Cambridge, UK
R. Bell
Lamont-Doherty Earth Observatory of Columbia University, Palisades, USA
C. Bianchi
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
R. G. Bingham
School of Geosciences, University of Aberdeen, UK
D. D. Blankenship
Institute for Geophysics, University of Texas at Austin, USA
G. Casassa
Centro de Estudios Cientificos, Santiago, Chile
G. Catania
Institute for Geophysics, University of Texas at Austin, USA
D. Callens
Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium
H. Conway
Earth and Space Sciences, University of Washington, Seattle, USA
A. J. Cook
Department of Geography, Swansea University, Swansea, UK
H. F. J. Corr
British Antarctic Survey, Cambridge, UK
D. Damaske
Federal Institute for Geosciences and Natural Resources, Hannover, Germany
V. Damm
Federal Institute for Geosciences and Natural Resources, Hannover, Germany
F. Ferraccioli
British Antarctic Survey, Cambridge, UK
R. Forsberg
National Space Institute, Technical University of Denmark, Denmark
S. Fujita
National Institute of Polar Research, Tokyo, Japan
Y. Gim
Jet Propulsion Laboratory. California Institute of Technology, Pasadena, USA
P. Gogineni
Electrical Engineering & Computer Science, University of Kansas, Lawrence, USA
J. A. Griggs
School of Geographical Sciences, University of Bristol, UK
R. C. A. Hindmarsh
British Antarctic Survey, Cambridge, UK
P. Holmlund
Stockholm University, Stockholm, Sweden
J. W. Holt
Institute for Geophysics, University of Texas at Austin, USA
R. W. Jacobel
St. Olaf College, Northfield, MN 55057, USA
A. Jenkins
British Antarctic Survey, Cambridge, UK
W. Jokat
Alfred Wegener Institute, Bremerhaven, Germany
T. Jordan
British Antarctic Survey, Cambridge, UK
E. C. King
British Antarctic Survey, Cambridge, UK
J. Kohler
Norwegian Polar Institute, Fram Centre, Tromsø, Norway
W. Krabill
NASA Wallops Flight Facility, Virginia, USA
M. Riger-Kusk
College of Science, University of Canterbury, Christchurch, New Zealand
K. A. Langley
Department of Geosciences, University of Oslo, Norway
G. Leitchenkov
Institute for Geology and Mineral Resources of the World Ocean, St.-Petersburg, Russia
C. Leuschen
Electrical Engineering & Computer Science, University of Kansas, Lawrence, USA
B. P. Luyendyk
Earth Research Institute, University of California in Santa Barbara, USA
K. Matsuoka
Norwegian Polar Institute, Tromso, Norway
J. Mouginot
Department of Earth System Science, University of California, Irvine, USA
F. O. Nitsche
Lamont-Doherty Earth Observatory of Columbia University, Palisades, USA
Y. Nogi
National Institute of Polar Research, Tokyo, Japan
O. A. Nost
Norwegian Polar Institute, Tromso, Norway
S. V. Popov
Polar Marine Geosurvey Expedition, St.-Petersburg, Russia
E. Rignot
School of Physical Sciences, University of California, Irvine, USA
D. M. Rippin
Environment Department, University of York, Heslington, York, YO10 5DD, UK
A. Rivera
Centro de Estudios Cientificos, Santiago, Chile
J. Roberts
Department of Sustainability, Environment, Water, Population and Communities, Australian Antarctic Division, Hobart, Tasmania, Australia
School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
M. J. Siegert
School of Geographical Sciences, University of Bristol, UK
A. M. Smith
British Antarctic Survey, Cambridge, UK
D. Steinhage
Alfred Wegener Institute, Bremerhaven, Germany
M. Studinger
NASA Goddard Space Flight Center, Greenbelt, USA
B. Sun
Polar Research Institute of China, Shanghai, China
B. K. Tinto
Lamont-Doherty Earth Observatory of Columbia University, Palisades, USA
B. C. Welch
Alfred Wegener Institute, Bremerhaven, Germany
D. Wilson
Instituite for Crustal Studies, University of California in Santa Barbara, USA
D. A. Young
Institute for Geophysics, University of Texas at Austin, USA
C. Xiangbin
Polar Research Institute of China, Shanghai, China
A. Zirizzotti
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Abstract. 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 data-coverage 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 72 m 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.
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How to cite. 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., and Zirizzotti, A.: Bedmap2: improved ice bed, surface and thickness datasets for Antarctica, The Cryosphere, 7, 375–393, https://doi.org/10.5194/tc-7-375-2013, 2013.