| Title | Active layer variability and change in the Mackenzie Valley, Northwest Territories |
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| Author | Duchesne, C ;
Smith, S L; Ednie, M; Bonnaventure, P P |
| Source | GoeQuebec 2015, challenges from north to south, conference program & abstracts/GeoQuebec 2015, des défis du nord au sud, programme de la conférence & resumes; by GeoQuebec; 2015 p. 107 |
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| Year | 2015 |
| Alt Series | Earth Sciences Sector, Contribution Series 20150110 |
| Meeting | 68e Conférence Canadienne de Géotechnique et 7e Conférence Canadienne sur le Pergélisol; Québec; CA; September 20-23, 2015 |
| Document | book |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Subjects | Nature and Environment |
| Program | Climate Change Geoscience Essential Climate Variable Monitoring |
| Abstract | The Geological Survey of Canada has maintained an active layer monitoring network in the Mackenzie Valley, Northwest Territories since 1991. Active layer thickness exhibits a great deal of spatial and
temporal variability particularly at tree dominated sites. Active layer thickness generally increased between 1991 and 1998 and then generally declined until about 2004. Since 2005 active layer thickness has generally increased reaching peak values
in 2012, although still less than the 1998 peak. Although thicker active layers may result from higher summer air temperatures, warmer conditions during the preceding winter can also substantially contribute to active layer thickness. |
| Summary | (Plain Language Summary, not published)
The Geological Survey of Canada has maintained an active layer monitoring network since 1991 for determination of annual maximum thaw depth and ground
movement in the Mackenzie Valley, NWT. Active layer thickness exhibits a great deal of spatial and temporal variability. Active layer thickness generally increased between 1991 and 1998 and then generally declined until about 2004. Since 2005 active
layer thickness has generally increased reaching peak values in 2012, although still less than the 1998 peak. Although thicker active layers may result from higher summer air temperatures, warmer conditions during the preceding winter can also
substantially contribute to active layer thickness. |
| GEOSCAN ID | 296670 |
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