Form and flow of the Devon Island Ice Cap, Canadian Arctic

In this study, 3370 km of 100 MHz ice‐penetrating radar data were acquired from Devon Ice Cap, Arctic Canada. Bed returns were obtained from >90% of flight tracks. Mean crossing point errors in ice surface elevation and ice thickness were 7–8 m. Digital elevation models of ice cap surface and bed...

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Bibliographic Details
Published in:Journal of Geophysical Research - Earth Surface 2004-06, Vol.109 (F2), p.F02002-n/a
Main Authors: Dowdeswell, J. A., Benham, T. J., Gorman, M. R., Burgess, D., Sharp, M. J.
Format: Article
Language:English
Subjects:
Arctic
Arctic region
Geomorphology
Glaciology
Hydrology
Information Related to Geographic Region
Radio Science
radio-echo sounding
Remote sensing
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Summary:In this study, 3370 km of 100 MHz ice‐penetrating radar data were acquired from Devon Ice Cap, Arctic Canada. Bed returns were obtained from >90% of flight tracks. Mean crossing point errors in ice surface elevation and ice thickness were 7–8 m. Digital elevation models of ice cap surface and bed elevation, and ice thickness, were produced and can be used as boundary conditions in numerical modeling. Devon Ice Cap, including 1960 km2 of contiguous stagnant ice to its west, is 14,010 km2. The ice cap proper is 12,050 km2. Its largest drainage basin is 2630 km2. The ice cap crest has a maximum measured elevation of 1921 m. Maximum recorded ice thickness is 880 m. Ice cap volume is 3980 km3 (about 10 mm sea level equivalent). The bed, 8% of which lies below sea level, is an upland plateau dissected by steep‐sided valleys that control the locations of the major outlet glaciers which dominate ice cap drainage. About 73 km, 4%, of the ice cap margin ends in tidewater. The margin is not floating. Icebergs of
ISSN:0148-0227
2156-2202
DOI:10.1029/2003JF000095