| Title | Potential changes in permafrost distribution in the Fort Simpson and Norman Wells regions |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Wright, J F; Smith, M W; Taylor, A E |
| Source | The physical environment of the Mackenzie Valley, Northwest Territories: a base line for the assessment of environmental change; by Dyke, L D (ed.); Brooks, G R (ed.); Geological Survey of Canada, Bulletin 547, 2000 p. 197-207; 1 CD-ROM, https://doi.org/10.4095/211930  Open Access |
| Links | Download entire publication
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| Links | Téléchargement de la publication au complet
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| Year | 2000 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; CD-ROM; digital; on-line |
| Related | This publication is contained in The physical environment of
the Mackenzie Valley, Northwest Territories: a base line for the assessment of environmental change |
| File format | bmp; pdf (Adobe Acrobat Reader v.6.0 is included / est fourni); txt; pdf |
| Province | Northwest Territories |
| NTS | 95H/11; 95H/12; 95H/13; 95H/14; 96E/01; 96E/02; 96E/07; 96E/08 |
| Area | Mackenzie Valley; Fort Simpson; Norman Wells |
| Lat/Long WENS | -122.0000 -121.0000 63.0000 62.5000 |
| Lat/Long WENS | -127.0000 -126.0000 67.5000 67.0000 |
| Subjects | sedimentology; surficial geology/geomorphology; climatic fluctuations; permafrost; ground ice; geothermal surveys; ground temperatures; precipitation; snow; thermal conductivity; vegetation;
Quaternary |
| Illustrations | sketch maps; flow charts; plots; graphs |
| Released | 2000 12 01 |
| Abstract | Modelling that predicts permafrost distribution and thickness in equilibrium with a given mean annual air temperature is applied to the Norman Wells and Fort Simpson regions. The model predicts the
likelihood of permafrost, based on values of thermal conductivity for the various surficial materials in each study area and a factor which describes the insulating property of ground-surface vegetation and snow cover. Estimates of permafrost
thickness are obtained for various combinations of terrain characteristics. Using maps of vegetation and surficial geology, these combinations can be compiled for each study area and used to map both permafrost thickness and extent, using a
geographic information system. This technique predicts that, under an increase in mean annual air temperature of 2°C, permafrost extent decreases slightly and thickness decreases markedly for the Norman Wells area. For the same temperature increase
at Fort Simpson, permafrost almost completely disappears.
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| GEOSCAN ID | 211930 |
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