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A High-resolution Bedrock Map for the Antarctic Peninsula : Volume 8, Issue 1 (17/02/2014)

By Huss, M.

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Book Id: WPLBN0004022982
Format Type: PDF Article :
File Size: Pages 35
Reproduction Date: 2015

Title: A High-resolution Bedrock Map for the Antarctic Peninsula : Volume 8, Issue 1 (17/02/2014)  
Author: Huss, M.
Volume: Vol. 8, Issue 1
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Huss, M., & Farinotti, D. (2014). A High-resolution Bedrock Map for the Antarctic Peninsula : Volume 8, Issue 1 (17/02/2014). Retrieved from http://nook-library.net/


Description
Description: Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, 8093 Zurich, Switzerland. Assessing and projecting the dynamic response of glaciers on the Antarctic Peninsula to changed atmospheric and oceanic forcing requires high-resolution ice thickness data as an essential geometric constraint for ice flow models. Here, we derive a complete bedrock data set for the Antarctic Peninsula north of 70° S on a 100 m grid. We calculate distributed ice thickness based on surface topography and simple ice dynamic modelling. Our approach is constrained with all available thickness measurements from Operation IceBridge and gridded ice flow speeds for the entire study region. The new data set resolves the rugged subglacial topography in great detail, indicates deeply incised troughs, and shows that 34% of the ice volume is grounded below sea level. The Antarctic Peninsula has the potential to raise global sea level by 71 ± 5 mm. In comparison to Bedmap2, covering all Antarctica on a 1 km grid, a significantly higher mean ice thickness (+48%) is found.

Summary
A high-resolution bedrock map for the Antarctic Peninsula

Excerpt
Allen, C.: IceBridge MCoRDS L2 Ice Thickness, National Snow and Ice Data Center, Boulder, Colorado, available at: http://nsidc.org/data/irmcr2.html (last access: 12 February 2014), 2013.; Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499–510, doi:10.5194/tc-7-499-2013, 2013.; Barrand, N. E., Hindmarsh, R. C. A., Arthern, R. J., Williams, C. R., Mouginot, J., Scheuchl, B., Rignot, E., Ligtenberg, S. R. M., van den Broeke, M. R., Edwards, T. L., Cook, A. J., and Simonsen, S. B.: Computing the volume response of the Antarctic Peninsula ice sheet to warming scenarios to 2200, J. Glaciol., 59, 397–409, doi:10.3189/2013JoG12J139, 2013a.; Barrand, N. E., Vaughan, D. G., Steiner, N., Tedesco, M., Kuipers Munneke, P., Broeke, M. R., and Hosking, J. S.: Trends in Antarctic Peninsula surface melting conditions from observations and regional climate modeling, J. Geophys. Res.-Earth, 118, 315–330, doi:10.1029/2012JF002559, 2013b.; Berthier, E., Scambos, T. A., and Shuman, C. A.: Mass loss of Larsen B tributary glaciers (Antarctic Peninsula) unabated since 2002, Geophys. Res. Lett., 39, L13501, doi:10.1029/2012GL051755, 2012.; Clarke, G. K. C., Anslow, F. S., Jarosch, A. H., Radic, V., Menounos, B., Bolch, T., and Berthier, E.: Ice volume and subglacial topography for western Canadian glaciers from mass balance fields, thinning rates, and a bed stress model, J. Climate, 26, 4282–4303, doi:10.1175/JCLI-D-12-00513.1, 2013.; Cook, A. J., Vaughan, D. G., Luckman, A., and Murray, T.: A new Antarctic Peninsula glacier inventory and observed area changes since the 1940s, Antarct. Sci., submitted, 2014.; Cook, A. J., Fox, A. J., Vaughan, D. G., and Ferrigno, J. G.: Retreating glacier fronts on the Antarctic Peninsula over the past half-century, Science, 308, 541–544, doi:10.1126/science.1104235, 2005.; Cook, A. J., Murray, T., Luckman, A., Vaughan, D. G., and Barrand, N. E.: A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment, Earth Syst. Sci. Data, 4, 129–142, doi:10.5194/essd-4-129-2012, 2012.; Cuffey, K. M. and Paterson, W. S. B.: The Physics of Glaciers, 4th edn., Butterworth-Heinemann, Oxford, 704 pp., 2010.; Depoorter, M., Bamber, J., Griggs, J., Lenaerts, J., Ligtenberg, S., van den Broeke, M., and Moholdt, G.: Calving fluxes and basal melt rates of Antarctic ice shelves, Nature, 502, 89–92, 2013.; Farinotti, D., Huss, M., Bauder, A., Funk, M., and Truffer, M.: A method for estimating the ice volume and ice thickness distribution of alpine glaciers, J. Glaciol., 55, 422–430, 2009.; Farinotti, D., Corr, H., and Gudmundsson, G. H.: The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling, Ann. Glaciol., 54, 18–24, doi:10.3189/2013AoG63A603, 2013.; Farinotti, D., King, E. C., Albrecht, A., Huss, M., and Gudmundsson, G. H.: The bedrock topography of Starbuck Glacier, Antarctic Peninsula, as measured by ground based radio-echo soundings, Ann. Glaciol., 55, in press, 2014.; 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

 

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