Influence of climate and terrain on ground temperatures in the continuous permafrost zone of northern Manitoba and Keewatin Districk, Canada
Mineral exploration in Northern Manitoba and District of Keewatin and investigations for a proposed natural gas pipeline have produced a need for permafrost information where virtually no data were previously available. Thermocouple and thermistor cables have been installed at various depths down to...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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1978
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| Online Access: | https://nrc-publications.canada.ca/eng/view/ft/?id=c980115f-7708-4bee-b0bd-31e5c7d6882f https://nrc-publications.canada.ca/eng/view/object/?id=c980115f-7708-4bee-b0bd-31e5c7d6882f https://nrc-publications.canada.ca/fra/voir/objet/?id=c980115f-7708-4bee-b0bd-31e5c7d6882f |
| Summary: | Mineral exploration in Northern Manitoba and District of Keewatin and investigations for a proposed natural gas pipeline have produced a need for permafrost information where virtually no data were previously available. Thermocouple and thermistor cables have been installed at various depths down to 15 m in different types of terrain in this region. Ground temperatures recorded during 1974-1976 inclusive and their relation to climatic and terrain factors are presented. Annual variations in ground temperatures and thickness of the active layer in response to annual fluctuations of summer and winter air temperatures indicate the influence of climate on permafrost. Ground temperatures vary in different types of terrain at one location due to variations in vegetation, snow cover, proximity to water bodies, and type of soil and rock. Dans le nord du Manitoba et le district de Keewatin, l'exploration minière et les études relatives au projet de construction d'un gazoduc exigent l'apport d'information sur le pergélisol, actuellement presque inexistantes. On a installé des câbles de thermocouples et thermistors à diverses profondeurs, jusqu'à 15 mètres, dans les divers types de terrain de cette région. On donne ici des relevés des températures du sol, de 1974 à 1976 inclus, et l'on indique les relations qui existent entre celles-ci et les éléments climatiques et morphologiques. Les variations annuelles de la température du sol et de l'épaisseur du mollisol, qui dépendent des fluctuations annuelles des températures atmosphériques d'hiver et d'été, indiquent l'influence du climat sur le pergélisol. Les températures du sol varient dans les divers types de terrain d'une région donnée, en fonction de la végétation, de la couverture nivale, de la proximité de plans d'eau, et des types de sols et de roches. Peer reviewed: No NRC publication: Yes |
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