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

P. Fretwell; H.D. Pritchard; D.G. Vaughan; N.E. Barrand; H.F.J. Corr; F. Ferraccioli; R.C.A. Hindmarsh; A. Jenkins; T. Jordan; E.C. King; A.M. Smith; J.L. Bamber; J.A. Griggs; M.J. Siegert; R. Bell; F.O. Nitsche; B.K. Tinto; C. Bianchi; A. Zirizzotti; R.G. Bingham; D.D. Blankenship; G. Catania; J.W. Holt; D.A. Young; G. Casassa; A. Rivera; D. Callens; H. Conway; A.J. Cook; D. Damaske; V. Damm; R. Forsberg; S. Fujita; Y. Gim; P. Gogineni; C. Leuschen; P. Holmlund; R.W. Jacobel; Y. Nogi; W. Jokat; D. Steinhage; B.C. Welch; J. Kohler; W. Krabill; M. Riger-Kusk; K.A. Langley; G. Leitchenkov; B.P. Luyendyk; K. Matsuoka; O.A. Nost; J. Mouginot; S.V. Popov; E. Rignot; D.M. Rippin; J. Roberts; N. Ross; M. Studinger; B. Sun; D. Wilson; C. Xiangbin

doi:10.5194/tc-7-375-2013

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

P. Fretwell, H.D. Pritchard, D.G. Vaughan, N.E. Barrand, H.F.J. Corr, F. Ferraccioli, R.C.A. Hindmarsh, A. Jenkins, T. Jordan, E.C. King, A.M. Smith, J.L. Bamber, J.A. Griggs, M.J. Siegert, R. Bell, F.O. Nitsche, B.K. Tinto, C. Bianchi, A. Zirizzotti, R.G. BinghamD.D. Blankenship, G. Catania, J.W. Holt, D.A. Young, G. Casassa, A. Rivera, D. Callens, H. Conway, A.J. Cook, D. Damaske, V. Damm, R. Forsberg, S. Fujita, Y. Gim, P. Gogineni, C. Leuschen, P. Holmlund, R.W. Jacobel, Y. Nogi, W. Jokat, D. Steinhage, B.C. Welch, J. Kohler, W. Krabill, M. Riger-Kusk, K.A. Langley, G. Leitchenkov, B.P. Luyendyk, K. Matsuoka, O.A. Nost, J. Mouginot, S.V. Popov, E. Rignot, D.M. Rippin, J. Roberts, N. Ross, M. Studinger, B. Sun, D. Wilson, C. Xiangbin

Geography, Earth and Environmental Sciences

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1054 Citations (Scopus)

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.

Original language	English
Pages (from-to)	375-393
Number of pages	19
Journal	The Cryosphere
Volume	7
Issue number	1
DOIs	https://doi.org/10.5194/tc-7-375-2013
Publication status	Published - 1 Jan 2013

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Fretwell, P., Pritchard, H. D., Vaughan, D. G., Barrand, N. E., Corr, H. F. J., Ferraccioli, F., Hindmarsh, R. C. A., Jenkins, A., Jordan, T., King, E. C., Smith, A. M., Bamber, J. L., Griggs, J. A., Siegert, M. J., Bell, R., Nitsche, F. O., Tinto, B. K., Bianchi, C., Zirizzotti, A., ... Xiangbin, C. (2013). Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica. The Cryosphere, 7(1), 375-393. https://doi.org/10.5194/tc-7-375-2013

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title = "Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica",

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.",

author = "P. Fretwell and H.D. Pritchard and D.G. Vaughan and N.E. Barrand and H.F.J. Corr and F. Ferraccioli and R.C.A. Hindmarsh and A. Jenkins and T. Jordan and E.C. King and A.M. Smith and J.L. Bamber and J.A. Griggs and M.J. Siegert and R. Bell and F.O. Nitsche and B.K. Tinto and C. Bianchi and A. Zirizzotti and R.G. Bingham and D.D. Blankenship and G. Catania and J.W. Holt and D.A. Young and G. Casassa and A. Rivera and D. Callens and H. Conway and A.J. Cook and D. Damaske and V. Damm and R. Forsberg and S. Fujita and Y. Gim and P. Gogineni and C. Leuschen and P. Holmlund and R.W. Jacobel and Y. Nogi and W. Jokat and D. Steinhage and B.C. Welch and J. Kohler and W. Krabill and M. Riger-Kusk and K.A. Langley and G. Leitchenkov and B.P. Luyendyk and K. Matsuoka and O.A. Nost and J. Mouginot and S.V. Popov and E. Rignot and D.M. Rippin and J. Roberts and N. Ross and M. Studinger and B. Sun and D. Wilson and C. Xiangbin",

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doi = "10.5194/tc-7-375-2013",

language = "English",

volume = "7",

pages = "375--393",

journal = "The Cryosphere",

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Fretwell, P, Pritchard, HD, Vaughan, DG, Barrand, NE, Corr, HFJ, Ferraccioli, F, Hindmarsh, RCA, Jenkins, A, Jordan, T, King, EC, Smith, AM, Bamber, JL, Griggs, JA, Siegert, MJ, Bell, R, Nitsche, FO, Tinto, BK, Bianchi, C, Zirizzotti, A, Bingham, RG, Blankenship, DD, Catania, G, Holt, JW, Young, DA, Casassa, G, Rivera, A, Callens, D, Conway, H, Cook, AJ, Damaske, D, Damm, V, Forsberg, R, Fujita, S, Gim, Y, Gogineni, P, Leuschen, C, Holmlund, P, Jacobel, RW, Nogi, Y, Jokat, W, Steinhage, D, Welch, BC, Kohler, J, Krabill, W, Riger-Kusk, M, Langley, KA, Leitchenkov, G, Luyendyk, BP, Matsuoka, K, Nost, OA, Mouginot, J, Popov, SV, Rignot, E, Rippin, DM, Roberts, J, Ross, N, Studinger, M, Sun, B, Wilson, D & Xiangbin, C 2013, 'Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica', The Cryosphere, vol. 7, no. 1, pp. 375-393. https://doi.org/10.5194/tc-7-375-2013

TY - JOUR

T1 - Bedmap2

T2 - Improved ice bed, surface and thickness datasets for Antarctica

AU - Fretwell, P.

AU - Pritchard, H.D.

AU - Vaughan, D.G.

AU - Barrand, N.E.

AU - Corr, H.F.J.

AU - Ferraccioli, F.

AU - Hindmarsh, R.C.A.

AU - Jenkins, A.

AU - Jordan, T.

AU - King, E.C.

AU - Smith, A.M.

AU - Bamber, J.L.

AU - Griggs, J.A.

AU - Siegert, M.J.

AU - Bell, R.

AU - Nitsche, F.O.

AU - Tinto, B.K.

AU - Bianchi, C.

AU - Zirizzotti, A.

AU - Bingham, R.G.

AU - Blankenship, D.D.

AU - Catania, G.

AU - Holt, J.W.

AU - Young, D.A.

AU - Casassa, G.

AU - Rivera, A.

AU - Callens, D.

AU - Conway, H.

AU - Cook, A.J.

AU - Damaske, D.

AU - Damm, V.

AU - Forsberg, R.

AU - Fujita, S.

AU - Gim, Y.

AU - Gogineni, P.

AU - Leuschen, C.

AU - Holmlund, P.

AU - Jacobel, R.W.

AU - Nogi, Y.

AU - Jokat, W.

AU - Steinhage, D.

AU - Welch, B.C.

AU - Kohler, J.

AU - Krabill, W.

AU - Riger-Kusk, M.

AU - Langley, K.A.

AU - Leitchenkov, G.

AU - Luyendyk, B.P.

AU - Matsuoka, K.

AU - Nost, O.A.

AU - Mouginot, J.

AU - Popov, S.V.

AU - Rignot, E.

AU - Rippin, D.M.

AU - Roberts, J.

AU - Ross, N.

AU - Studinger, M.

AU - Sun, B.

AU - Wilson, D.

AU - Xiangbin, C.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - 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.

AB - 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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Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica

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