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TitleVariability and change in permafrost thermal state in northern Canada
AuthorSmith, S LORCID logo; Lewkowicz, A G; Duchesne, CORCID logo; Ednie, M
SourceProceedings of the GeoQuebec 2015 Geotechnical Conference and 7th Canadian Permafrost Conference; 2015, 6 pages
Alt SeriesEarth Sciences Sector, Contribution Series 20150074
PublisherCanadian Geotechnical Society
MeetingGeoQuebec 2015 Geotechnical Conference and 7th Canadian Permafrost Conference
Mediapaper; on-line; digital
File formatpdf
ProvinceAlberta; British Columbia; Nunavut; Manitoba; Yukon; Northwest Territories
NTS54B; 54C; 54D; 54E; 54F; 54K; 54L; 54M; 84M; 94I; 120; 26; 27; 28; 29; 36; 37; 38; 39; 340; 45; 46; 47; 48; 49; 55; 56; 57; 58; 59; 540; 65; 66; 67; 68; 69; 75; 76; 77; 78; 79; 85; 86; 87; 88; 89; 95; 96; 97; 98; 99; 105; 106; 107A; 107B; 107C; 107D; 115A; 115B; 115C/01; 115C/02; 115C/07; 115C/08; 115C/09; 115C/10; 115C/15; 115C/16; 115F/01; 115F/02; 115F/07; 115F/08; 115F/09; 115F/10; 115F/15; 115F/16; 115G; 115H; 115I; 115J; 115K/01; 115K/02; 115K/07; 115K/08; 115K/09; 115K/10; 115K/15; 115K/16; 115N/01; 115N/02; 115N/07; 115N/08; 115N/09; 115N/10; 115N/15; 115N/16; 115O; 115P; 116A; 116B; 116C/01; 116C/02; 116C/07; 116C/08; 116C/09; 116C/10; 116C/15; 116C/16; 116F/01; 116F/02; 116F/07; 116F/08; 116F/09; 116F/10; 116F/15; 116F/16; 116G; 116H; 116I; 116J; 116K/01; 116K/02; 116K/07; 116K/08; 116K/09; 116K/10; 116K/15; 116K/16; 116N/01; 116N/02; 116N/07; 116N/08; 116N/09; 116N/10; 116N/15; 116N/16; 116O; 116P; 117A; 117B/01; 117B/08; 117B/09; 117B/16; 117C/01; 117C/08; 117C/09; 117C/16; 117D
Lat/Long WENS-102.0000 -89.0000 60.0000 56.0000
Lat/Long WENS-120.0000 -118.0000 60.0000 59.0000
Lat/Long WENS-122.0000 -120.0000 59.0000 58.0000
Lat/Long WENS-141.0000 -64.0000 84.0000 60.0000
Subjectsenvironmental geology; Nature and Environment; LANDSAT; permafrost; soils; groundwater; ground ice; ground temperatures; freezing ground; climate, arctic; climate; climate effects
Illustrationslocation maps; graphs
ProgramClimate Change Geoscience Essential Climate Variable Monitoring
Released2015 01 01
AbstractThe thermal state of permafrost snapshot established during the International Polar Year (IPY 2007-09) provided a baseline against which future change could be measured. Comparison of permafrost temperatures measured 4 to 5 years post IPY to the IPY snapshot indicates that temperatures have increased at many sites with larger increases found in the eastern and high Arctic. The changes in permafrost thermal state since IPY were examined in the context of the longer record available for some sites. Generally permafrost continued to warm across northern Canada however increases in permafrost temperature have occurred at a higher rate since about 2000 in the eastern and high Arctic compared to the western Arctic. These regional differences in the changes in permafrost thermal state are associated with regional variations in air temperature trends.
Summary(Plain Language Summary, not published)
Permafrost temperatures measured across Canada in 2013-14 are compared to the baseline established during the International Polar Year (IPY, 2007-09). Permafrost has warmed since IPY at several sites with the greatest change occurring in the cold permafrost of the eastern and high Arctic. Little or no change has been observed in warm permafrost of the Mackenzie Valley and southern Yukon but some degradation of permafrost has been observed. These results are consistent with those from long-term records of permafrost temperature collected over the last 2 to 3 decades and indicate that permafrost warming is continuing. This warming and thawing of permafrost has implications for ecosystems and infrastructure in northern Canada.

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