GEOSCAN Search Results: Fastlink


TitleLong-term active layer monitoring: Mackenzie Valley, northwest Canada
AuthorNixon, M; Tarnocai, C; Kutny, L
SourceProceedings of the Eighth International Conference on Permafrost; by Phillips, M (ed.); Springman, S M (ed.); Arenson, L U (ed.); vol. 1, 2003 p. 821-826
Links8th International Conference on Permafrost
Alt SeriesGeological Survey of Canada, Contribution Series 2002036
PublisherA.A. Balkema Publishers (Lisse, NL)
MeetingEighth International Conference on Permafrost; Zurich; CH; July 21-25, 2003
ProvinceNorthwest Territories; Alberta
NTS84J/03; 84J/04; 84J/05; 84J/06; 84J/11; 84J/12; 84J/13; 84J/14; 84K; 84L; 84M; 84N; 84O/03; 84O/04; 84O/05; 84O/06; 84O/11; 84O/12; 84O/13; 84O/14; 85B/03; 85B/04; 85B/05; 85B/06; 85B/11; 85B/12; 85B/13; 85B/14; 85C; 85D; 85E; 85F; 85K/02; 85K/03; 85K/04; 85K/05; 85K/06; 85K/11; 85K/12; 85K/13; 85L; 85M/01; 85M/02; 85M/03; 85M/04; 85M/05; 85M/06; 85M/07; 85M/11; 85M/12; 85M/13; 95A; 95B; 95E; 95F; 95G; 95H; 95I; 95J; 95K; 95M; 95N; 95O; 95P; 96A; 96B; 96C; 96D; 96E; 96F; 96G; 96K; 96L; 96M/01; 96M/02; 96M/03; 96M/04; 96M/05; 96M/06; 96M/07; 96M/12; 106A; 106G/01; 106G/07; 106G/08; 106G/09; 106G/10; 106G/14; 106G/15; 106G/16; 106H; 106I; 106J; 106K/08; 106K/09; 106K/10; 106K/14; 106K/15; 106K/16; 106M; 106N; 106O; 106P; 107A/02; 107A/03; 107A/04; 107A/05; 107A/06; 107A/11; 107A/12; 107A/13; 107B; 107C/01; 107C/02; 107C/03; 107C/04; 107C/05; 107C/06; 107C/07; 107C/08; 107C/10; 107C/11; 107C/12; 107C/13; 107C/14; 116P/01; 116P/08; 116P/09; 116P/16; 117A/01; 117A/08; 117A/09; 117A/16; 117D/01; 117D/08; 117D/09; 117D/16
AreaMackenzie Valley; Mackenzie River Delta; Tuktoyaktuk; Inuvik; Norman Wells; Fort Simpson; Liard River
Lat/Long WENS-136.5000 -115.0000 70.0000 58.0000
Subjectsenvironmental geology; arctic geology; climate, arctic; climate; climate effects; permafrost; soils; vegetation; snow
Illustrationssketch maps; tables; bar graphs
AbstractActive layer study programs have been maintained for more than a decade throughout the 1400km length of the Mackenzie Valley. An important goal of these programs is to monitor processes linking climate,permafrost and the active layer. Seventeen representative sites from this area were selected for this study. Annual maximum thaw penetration and ground surface movement are measured relative to thaw tubes and soil temperature probes anchored in permafrost. Active layer thickness, calculated from thaw penetration and surface movement or measured directly, varies more with local soil properties, vegetation and microclimate than with regional atmospheric climate. While depth of thaw penetration has increased at most sites over the last 10–15 years, this increase is not always reflected by a proportional increase in active layer thickness because of variable thaw settlement. Air thawing degree-days (DDT) in the Subarctic and Boreal are more than twice those in the Arctic. These increases in DDT are not reflected by active layer depths, suggesting the insulating effect of the surface organic layer, vegetation and snow cover on active layer development.

Date modified: