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

被引：1449

作者：

Fretwell, P. ^{[1
]}

Pritchard, H. D. ^{[1
]}

Vaughan, D. G. ^{[1
]}

Bamber, J. L. ^{[2
]}

Barrand, N. E. ^{[1
]}

Bell, R. ^{[3
]}

Bianchi, C. ^{[4
]}

Bingham, R. G. ^{[5
]}

Blankenship, D. D. ^{[6
]}

Casassa, G. ^{[7
]}

Catania, G. ^{[6
]}

Callens, D. ^{[8
]}

Conway, H. ^{[9
]}

Cook, A. J. ^{[10
]}

Corr, H. F. J. ^{[1
]}

Damaske, D. ^{[11
]}

Damm, V. ^{[11
]}

Ferraccioli, F. ^{[1
]}

Forsberg, R. ^{[12
]}

Fujita, S. ^{[13
]}

Gim, Y. ^{[14
]}

Gogineni, P. ^{[15
]}

Griggs, J. A. ^{[2
]}

Hindmarsh, R. C. A. ^{[1
]}

Holmlund, P. ^{[16
]}

Holt, J. W. ^{[6
]}

Jacobel, R. W. ^{[17
]}

Jenkins, A. ^{[1
]}

Jokat, W. ^{[18
]}

Jordan, T. ^{[1
]}

King, E. C. ^{[1
]}

Kohler, J. ^{[19
]}

Krabill, W. ^{[20
]}

Riger-Kusk, M. ^{[21
]}

Langley, K. A. ^{[22
]}

Leitchenkov, G. ^{[23
]}

Leuschen, C. ^{[15
]}

Luyendyk, B. P. ^{[24
]}

Matsuoka, K. ^{[25
]}

Mouginot, J. ^{[26
]}

Nitsche, F. O. ^{[3
]}

Nogi, Y. ^{[27
]}

Nost, O. A. ^{[25
]}

Popov, S. V. ^{[28
]}

Rignot, E. ^{[29
]}

Rippin, D. M. ^{[30
]}

Rivera, A. ^{[7
]}

Roberts, J. ^{[31
]}

Ross, N. ^{[32
]}

Siegert, M. J. ^{[2
]}

机构：

[1] British Antarctic Survey, Cambridge CB3 0ET, England

[2] Univ Bristol, Sch Geog Sci, Bristol BS8 1TH, Avon, England

[3] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA

[4] Ist Nazl Geofis & Vulcanol, Rome, Italy

[5] Univ Aberdeen, Sch Geosci, Aberdeen AB9 1FX, Scotland

[6] Univ Texas Austin, Inst Geophys, Austin, TX 78712 USA

[7] Ctr Estudios Cient, Valdivia 9, Chile

[8] Univ Libre Bruxelles, Lab Glaciol, Brussels, Belgium

[9] Univ Washington, Seattle, WA 98195 USA

[10] Swansea Univ, Dept Geog, Swansea, W Glam, Wales

[11] Fed Inst Geosci & Nat Resources, Hannover, Germany

[12] Tech Univ Denmark, Natl Space Inst, Lyngby, Denmark

[13] Natl Inst Polar Res, Tokyo, Japan

[14] CALTECH, Jet Prop Lab, Pasadena, CA USA

[15] Univ Kansas, Lawrence, KS 66045 USA

[16] Stockholm Univ, S-10691 Stockholm, Sweden

[17] St Olaf Coll, Northfield, MN 55057 USA

[18] Alfred Wegener Inst Polar & Marine Res, Bremerhaven, Germany

[19] Norwegian Polar Res Inst, Fram Ctr, Tromso, Norway

[20] NASA, Wallops Flight Facil, Wallops Isl, VA USA

[21] Univ Canterbury, Coll Sci, Christchurch 1, New Zealand

[22] Univ Oslo, Dept Geosci, N-0316 Oslo, Norway

[23] Inst Geol & Mineral Resources World Ocean, St Petersburg, Russia

[24] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA

[25] Norwegian Polar Res Inst, Tromso, Norway

[26] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA

[27] Natl Inst Polar Res, Tokyo, Japan

[28] Polar Marine Geosurvey Expedit, St Petersburg, Russia

[29] Univ Calif Irvine, Sch Phys Sci, Irvine, CA USA

[30] Univ York, Environm Dept, York YO10 5DD, N Yorkshire, England

[31] Australian Antarctic Div, Dept Sustainabil Environm Water Populat & Communi, Hobart, Tas, Australia

[32] Newcastle Univ, Sch Geog Polit & Sociol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[33] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[34] Polar Res Inst China, Shanghai, Peoples R China

[35] Univ Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106 USA

来源：

CRYOSPHERE | 2013年 / 7卷 / 01期

基金：

美国国家科学基金会;

关键词：

DIGITAL ELEVATION MODEL; SATELLITE RADAR; EAST ANTARCTICA; WEST; SHEET; SEA; GRAVITY; BENEATH; BATHYMETRY; TOPOGRAPHY;

D O I：

10.5194/tc-7-375-2013

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

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 degrees 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 km(3)) 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.

引用

页码：375 / 393

页数：19

共 64 条

[31] Melting of floating ice and sea level rise [J].