| Title | Hydrological implications of periglacial expansion in the Peyto Glacier catchment, Canadian Rockies |
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| Author | Hopkinson, C; Demuth, M N; Sitar, M |
| Source | Proceedings of the Remote Sensing and Hydrology 2010 Symposium; 2010 p. 1-4 |
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| Year | 2010 |
| Alt Series | Earth Sciences Sector, Contribution Series 20110105 |
| Meeting | Remote Sensing and Hydrology 2010 Symposium; Jackson Hole, Wyoming; US; September 27-30, 2010 |
| Document | book |
| Lang. | English |
| Media | paper |
| File format | pdf |
| Province | Alberta |
| NTS | 82N/10 |
| Area | Peyto Glacier |
| Lat/Long WENS | -117.0000 -116.5000 51.7500 51.5000 |
| Subjects | hydrogeology; geophysics; surficial geology/geomorphology; Nature and Environment; hydrologic environment; glaciers; glacier surveys; remote sensing; glaciology; LiDAR |
| Illustrations | location maps; plots |
| Program | Climate Change Geoscience |
| Released | 2010 01 01 |
| Abstract | Multi-temporal photogrammetric and LiDAR-based DEMs collected over the Peyto Glacier (1949, 1966, 1993, 2000, 2010) were analysed to quantify rates of glacial and periglacial volumetric change. During
this time, exposed glacier ice area has reduced by 18% from 14.2 to 11.6 km2, while the actively downwasting lateral moraine area has increased by 70% from 0.53 to 0.90 km2. This opposite trend results in an exponential increase in the periglacial
areal proportion of actively downwasting surfaces. Mean annual volumetric loss from the glacier surface has been 14 × 106 m3, with active moraine downwasting accounting for a further 0.6 × 106 m3 (4.5%). Moraine volumetric losses from 2000 to 2010
were >6%, with an additional >2% in small hanging glacier and perennial snow patch areas. These results indicate that while Peyto Glacier is undergoing continuous retreat, runoff from periglacial areas ignored in the mass balance record account for
up to 8% of contemporary losses from basin storage. LiDAR data were essential to this analysis, as accurate stratification of glacial and periglacial volumetric changes are not normally feasible using traditional field and photogrammetric mass
balance techniques. |
| GEOSCAN ID | 288871 |
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