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Brief Communication: Sudden Drainage of a Subglacial Lake Beneath the Greenland Ice Sheet : Volume 8, Issue 5 (16/10/2014)

By Howat, I. M.

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Book Id: WPLBN0004023024
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Brief Communication: Sudden Drainage of a Subglacial Lake Beneath the Greenland Ice Sheet : Volume 8, Issue 5 (16/10/2014)  
Author: Howat, I. M.
Volume: Vol. 8, Issue 5
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

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Porter, C., Smith, B. E., Noh, M. J., Jeong, S., & Howat, I. M. (2014). Brief Communication: Sudden Drainage of a Subglacial Lake Beneath the Greenland Ice Sheet : Volume 8, Issue 5 (16/10/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: School of Earth Sciences and Byrd Polar Research Center, Ohio State University, Columbus, Ohio, USA. We report on the appearance of a 2 km wide, 70 m deep circular depression located 50 km inland of the southwestern margin of the Greenland Ice Sheet that provides the first direct evidence for concentrated, long-term storage, and sudden release, of meltwater at the bed. Drainage of the lake may have been triggered by the recent increase in meltwater runoff. The abundance of such lakes and their potential importance to the ice sheet's hydrologic system and flow regime remain unknown.

Summary
Brief Communication: Sudden drainage of a subglacial lake beneath the Greenland Ice Sheet

Excerpt
Bartholomew, I., Nienow, P., Sole, A., Mair, D., Cowton, T., Palmer, S., and Wadham, J.: Supraglacial forcing of subglacial drainage in the ablation zone of the Greenland ice sheet, Geophys. Res. Lett., 38, L08502, doi:10.1029/2011GL047063, 2011.; Borsa, A. A., Moholdt, G., Fricker, H. A., and Brunt, K. M.: A range correction for ICESat and its potential impact on ice-sheet mass balance studies, The Cryosphere, 8, 345–357, doi:10.5194/tc-8-345-2014, 2014.; Chandler, D. M., Wadham, J. L., Lis, G. P., Cowton, T., Sole, A., Bartholomew, I., Telling, J., Nienow, P., Bagshaw, E. B., Mair, D., Vinen, S., and Hubbard, A.: Evolution of the subglacial drainage system beneath the Greenland Ice Sheet revealed by tracers, Nat. Geosci., 6, 195–198, 2013.; Clarke, G. C.: Glaciology: ice-sheet plumbing in Antarctica, Nature, 440, 1000–1001, doi:10.1038/4401000a, 2006.; Cuffey, K. M. and Paterson, W. S. B.: The Physics of Glaciers, 4, Butterworth-Heinemann, Amsterdam, 682 pp., 2010.; Das, S. B., Joughin, I., Behn, M. D., Howat, I. M., King, M. A., Lizarralde, D., and Bhatia, M. P.: Fracture propagation to the base of the Greenland Ice Sheet during supraglacial lake drainage, Science, 320, 778–781, doi:10.1126/science.1153360, 2008.; Fitzpatrick, A. A.W., Hubbard, A., Joughin, I., Quincey, D. J., Van As, D., Mikkelsen, A. P. B., Doyle, S. H., Hasholt, B., and Jones, G. A.: Ice flow dynamics and surface meltwater flux at a land-terminating sector of the Greenland ice sheet, J. Glaciol., 59, 687–696, doi:10.3189/2013JoG12J143, 2013.; Fitzpatrick, A. A. W., Hubbard, A. L., Box, J. E., Quincey, D. J., van As, D., Mikkelsen, A. P. B., Doyle, S. H., Dow, C. F., Hasholt, B., and Jones, G. A.: A decade (2002–2012) of supraglacial lake volume estimates across Russell Glacier, West Greenland, The Cryosphere, 8, 107–121, doi:10.5194/tc-8-107-2014, 2014.; Forster, R. R., Box, J. E., van den Broeke, M. R., Miege, C., Burgess, E. W., van Angelen, J. H., Lenaerts, J. T. M., Koenig, L. S., Paden, J., Lewis, C., Gogineni, S. P., Leuschen, C., and McConnell, J. R.: Extensive liquid meltwater storage in firn within the Greenland ice sheet, Nat. Geosci., 7, 95–98, doi:10.1038/NGEO2043, 2014.; Joughin, I., Smith, B. E., Howat, I. M., Scambos, T., and Moon, T.: Greenland flow variability from ice-sheet-wide velocity mapping, J. Glaciol., 56, 415–430, 2010.; Joughin, I., Das, S. B., Flowers, G. E., Behn, M. D., Alley, R. B., King, M. A., Smith, B. E., Bamber, J. L., van den Broeke, M. R., and van Angelen, J. H.: Influence of ice-sheet geometry and supraglacial lakes on seasonal ice-flow variability, The Cryosphere, 7, 1185–1192, doi:10.5194/tc-7-1185-2013, 2013.; Korona, J., Berthier, E., Bernard, M., Rémy, F., and Thouvenot, E.: SPIRIT. SPOT 5 stereoscopic survey of polar ice: reference images and topographies during the fourth international polar year (2007–2009), ISPRS J. Photogramm., 64, 204–212, doi:10.1016/j.isprsjprs.2008.10.005, 2009.; Palmer, S. J., Dowdeswell, J. A., Christoffersen, P., Young, D. A., Blankenship, D. D., Greenbaum, J. S., Benham, T., Bamber, J., and Siegert, M. J.: Greenland subglacial lakes detected by radar, Geophys. Res. Lett., 40, 6154–6159, doi:10.1002/2013GL058383, 2013.; Schoof, C.: Ice-sheet acceleration driven by melt supply variability, Nature, 468, 803–806,

 

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