| Title | Permafrost degradation, subarctic Canadian Shield |
| Author | Morse, P D; Wolfe, S A; McWade, T L; Kokelj, S |
| Source | Book of abstracts, 5th European Conference on Permafrost; by Deline, P (ed.); Bodin, X (ed.); Ravanel, L (ed.); 2018 p. 587-588 (Open Access) |
| Links | Online - En ligne (complete volume - volume complet, pdf, 148.55
MB)
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| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20180066 |
| Publisher | International Permafrost Association (Chamonix, France) |
| Meeting | EUCOP 2018: 5th European Conference on Permafrost; Chamonix-Mont Blanc; FR; June 23 - July 1, 2018 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf (Adobe® Reader®) |
| Province | Northwest Territories |
| NTS | 85J/06; 85J/07; 85J/08; 85J/09; 85J/10; 85J/11; 85J/14; 85J/15; 85J/16 |
| Area | Tlicho Region; North Slave Region; Great Slave Lake |
| Lat/Long WENS | -115.3333 -114.3333 62.9333 62.3833 |
| Subjects | environmental geology; surficial geology/geomorphology; geophysics; permafrost; ground ice; climate; ground temperatures; periglacial features; thermokarst; vegetation; remote sensing; photogrammetric
techniques; airphoto interpretation; satellite imagery; Canadian Shield; Great Slave Lowland; Great Slave Upland; permafrost degradation; climate change; lithalsas; thermal degradation; forests; geological mapping |
| Illustrations | location maps; geoscientific sketch maps; aerial photographs; satellite images; profiles; time series |
| Program | Permafrost, Climate
Change Geoscience |
| Released | 2019 02 04 |
| Abstract | Recent ground temperature and observational data for lithalsas (permafrost mounds of ice-rich, fine-grained sediments) are examined in the context of an inventory of thermokarst ponding between 1945 and
2005, subarctic Canadian Shield. Results show that many lithalsas are thermally and physically degrading, and widespread thermokarst primarily relates to lithalsa distribution. Future thermokarst development in this region of extensive discontinuous
permafrost will continue to be associated with lithalsas that generally lack a protective surface organic layer. |
| Summary | (Plain Language Summary, not published)
Recent ground temperature and observational data for lithalsas (permafrost mounds of ice-rich, fine-grained sediments) are examined in the context of an
inventory of thermokarst (ground settlement when ice-rich permafrost thaws) ponding between 1945 and 2005, subarctic Canadian Shield. Results show that many lithalsas are thermally and physically degrading, and widespread thermokarst primarily
relates to lithalsa distribution. Future thermokarst development in this region of extensive discontinuous permafrost will continue to be associated with lithalsas that generally lack a protective surface organic layer. |
| GEOSCAN ID | 308270 |
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