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TitleHigh Arctic permafrost observatory at Alert, Nunavut - analysis of a 23 year data set
AuthorSmith, S L; Burgess, M M; Taylor, A E
SourcePermafrost : proceedings of the 8th International Conference on Permafrost; by Phillips, M (ed.); Springman, S M (ed.); Arenson, L U (ed.); 2003 p. 1073-1078
Year2003
Alt SeriesGeological Survey of Canada, Contribution Series 2002053
PublisherA.A. Balkema (Lisse, The Netherlands)
Meeting8th International Conference on Permafrost; Zurich; CH; July 21-25, 2003
Documentbook
Lang.English
Mediapaper
ProvinceNunavut
NTS120E/05; 120E/06; 120E/11; 120E/12
Lat/Long WENS -62.6833 -62.0000 82.5000 82.3333
Subjectsenvironmental geology; regional geology; Nature and Environment; arctic geology; climate, arctic; permafrost; ground temperatures; boreholes; groundwater temperatures; snow; vegetation; thermal analyses; logging techniques
Illustrationslocation maps; graphs; bar graphs
ProgramClimate Change Action Fund (CCAF)
ProgramGovernment of Canada Action Plan 2000 on Climate Change
AbstractGround temperatures up to depths of 60 m have been measured on a regular basis since 1978 in five boreholes at Canadian Forces Station Alert, Nunavut. A general increase in air temperature of 0.12°C per year since 1986 has been accompanied by an observed rise in permafrost temperature in the upper 30 m with the trend interrupted by a brief period of cooling in the early 1990s. Since the mid 1990s, permafrost temperatures in the upper 30 m have increased by 0.15°C per year. Cooling of air temperature from the 1950s to the early 1980s appears to have resulted in lower permafrost temperature at depths below 40 m. Snow cover is thin but exhibits high spatial and temporal variability which is reflected in the response of the shallow permafrost temperatures to changes in air temperature.
GEOSCAN ID213505