| Title | Spatial patterns of snow accumulation across Belcher Glacier, Devon Ice Cap, Nunavut, Canada |
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| Author | Sylvestre, T; Copland, L; Demuth, M N; Sharp, M |
| Source | Journal of Glaciology vol. 59, no. 217, 2013 p. 874-882, https://doi.org/10.3189/2013JoG12J227  Open Access |
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| Year | 2013 |
| Alt Series | Earth Sciences Sector, Contribution Series 20110344 |
| Publisher | Cambridge University Press (CUP) |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Nunavut |
| NTS | 48H/10; 48H/11; 48H/14; 48H/15 |
| Area | Belcher Glacier; Devon Ice Cap |
| Lat/Long WENS | -83.0000 -81.0000 76.0000 75.5000 |
| Subjects | environmental geology; Nature and Environment; radar probes; ground probing radar; radar imagery; glaciers; neutron well logging; snow; ice; ice conditions |
| Illustrations | location maps; tables; core logs; satellite images |
| Program | Climate Change Geoscience |
| Released | 2017 07 10 |
| Abstract | Ground-penetrating radar (GPR) surveys at a center frequency of 500MHz were used to determine winter (2007/08) and net annual (2005-07) snow water equivalent (SWE) patterns across the upper parts of
Belcher Glacier, Devon Ice Cap, Nunavut, Canada. The GPR measurements were validated against snow depths determined from avalanche probe measurements, and converted to SWE values using densities measured with a down-borehole neutron density probe and
in shallow snow pits. Distinct internal reflection horizons (IRHs) in the GPR record were formed during warm summers in 2007 and 2005, and a large rain event in summer 2006 which caused ice to accumulate above the 2005 melt surface. Elevation
provides the dominant control on winter SWE distribution across the basin, with surface topography (e.g. gullies) also being locally important. Based on the location where IRHs intersected the ice-cap surface, the basin-wide firn line occurred at an
altitude of 1260-1300m over the period 2005-08. Net mass balance across the accumulation area of Belcher Glacier averaged 0.24mw.e. a-1 over the period 2005-07, mainly dependent on altitude. This is a little higher than most previous estimates for
the period since the 1960s, although the differences lie within error limits. |
| GEOSCAN ID | 289842 |
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