Bed roughness beneath the Greenland ice sheet
نویسندگان
چکیده
منابع مشابه
Subglacial lake drainage detected beneath the Greenland ice sheet
The contribution of the Greenland ice sheet to sea-level rise has accelerated in recent decades. Subglacial lake drainage events can induce an ice sheet dynamic response--a process that has been observed in Antarctica, but not yet in Greenland, where the presence of subglacial lakes has only recently been discovered. Here we investigate the water flow paths from a subglacial lake, which drained...
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Subglacial topography plays an important role in modulating the distribution and flow of basal water. Where topography predates ice sheet inception, it can also reveal insights into former tectonic and geomorphological processes. Although such associations are known in Antarctica, little consideration has been given to them in Greenland, partly because much of the ice sheet bed is thought to be...
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The Ice, Cloud and land Elevation Satellite (ICESat) in its 8 day repeat orbit mode provided data not only on the along-track surface slope, but also on the cross-track surface slope from adjacent repeat ground tracks. During the first 36 days of operation, four to five such repeat orbits occurred within 1 km in the cross-track direction. This provided an opportunity to use ICESat data to measu...
متن کاملRegional-scale bed roughness beneath ice masses: measurement and analysis
We outline a method of assessing the roughness of the bed beneath ice-masses, applicable to data collected in a wide variety of (glaciated) environments. Roughness at scales 410m in particular is poorly constrained and understood in glaciated systems, and regional geophysical surveys collected over the past 30 years are ideally suited to addressing this issue. We demonstrate the technique using...
متن کاملGreenland Ice Sheet sensitivity Pliocene
S. J. Koenig, A. M. Dolan, B. de Boer, E. J. Stone, D. J. Hill, R. M. DeConto, A. Abe-Ouchi, D. J. Lunt, D. Pollard, A. Quiquet, F. Saito, J. Savage, and R. van de Wal Department of Geosciences, University of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, USA School of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UK Department of Earth Scien...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2013
ISSN: 0022-1430,1727-5652
DOI: 10.3189/2013jog12j212