| Titre | Permafrost degradation, subarctic Canadian Shield |
| Auteur | Morse, P D; Wolfe, S A; McWade, T L; Kokelj, S |
| Source | Book of abstracts, 5th European Conference on Permafrost; par Deline, P (éd.); Bodin, X (éd.); Ravanel, L (éd.); 2018 p. 587-588 (Accès ouvert) |
| Liens | Online - En ligne (complete volume - volume complet, pdf, 148.55 MB)
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| Année | 2018 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20180066 |
| Éditeur | International Permafrost Association |a Chamonix, France (Chamonix, France) |
| Réunion | EUCOP 2018: 5th European Conference on Permafrost; Chamonix-Mont Blanc; FR; juin 23 - juillet 1, 2018 |
| Document | livre |
| Lang. | anglais |
| Media | papier; en ligne; numérique |
| Formats | pdf (Adobe® Reader®) |
| Province | Territoires du Nord-Ouest |
| SNRC | 85J/06; 85J/07; 85J/08; 85J/09; 85J/10; 85J/11; 85J/14; 85J/15; 85J/16 |
| Région | Tlicho Region; North Slave Region; Grand lac des Esclaves |
| Lat/Long OENS | -115.3333 -114.3333 62.9333 62.3833 |
| Sujets | pergélisol; glace fossile; climat; températures au sol; caractéristiques périglaciaires; thermokarst; végétation; télédétection; méthodes photogrammétriques; interprétation de photos aériennes; imagerie
par satellite; Bouclier Canadien; changement climatique; buttes cryogènes; forêt; géologie de l'environnement; géologie des dépôts meubles/géomorphologie; géophysique |
| Illustrations | cartes de localisation; cartes géolscientiques généralisées; photographies aériennes; images satellitaires; profils; séries chronologiques |
| Programme | Géosciences de changements climatiques, Pergélisols |
| Diffusé | 2019 02 04 |
| Résumé | (disponible en anglais seulement)
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. |
| Sommaire | (Résumé en langage clair et simple, non publié)
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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