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| Titel |
Bedmap2: improved ice bed, surface and thickness datasets for Antarctica |
| VerfasserIn |
P. Fretwell, H. D. Pritchard, D. G. Vaughan, J. L. Bamber, N. E. Barrand, R. Bell, C. Bianchi, R. G. Bingham, D. D. Blankenship, G. Casassa, G. Catania, D. Callens, H. Conway, A. J. Cook, H. F. J. Corr, D. Damaske, V. Damm, F. Ferraccioli, R. Forsberg, S. Fujita, Y. Gim, P. Gogineni, J. A. Griggs, R. C. A. Hindmarsh, P. Holmlund, J. W. Holt, R. W. Jacobel, A. Jenkins, W. Jokat, T. Jordan, E. C. King, J. Köhler, W. Krabill, M. Riger-Kusk, K. A. Langley, G. Leitchenkov, C. Leuschen, B. P. Luyendyk, K. Matsuoka, J. Mouginot, F. O. Nitsche, Y. Nogi, O. A. Nøst, S. V. Popov, E. Rignot, D. M. Rippin, A. Rivera, J. Roberts, N. Ross, M. J. Siegert, A. M. Smith, D. Steinhage, M. Studinger, B. Sun, B. K. Tinto, B. C. Welch, D. Wilson, D. A. Young, C. Xiangbin, A. Zirizzotti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 1 ; Nr. 7, no. 1 (2013-02-28), S.375-393 |
| Datensatznummer |
250017937
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| Publikation (Nr.) |
 copernicus.org/tc-7-375-2013.pdf |
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| Zusammenfassung |
| 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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