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TitleRecent changes in climate and permafrost temperatures at forested and polar desert sites in northern Canada
AuthorSmith, S LORCID logo; Throop, J; Lewkowicz, A G
SourceFundamental and applied research on permafrost in Canada; Canadian Journal of Earth Sciences vol. 49, 2012 p. 1-11,
Alt SeriesEarth Sciences Sector, Contribution Series 20110127
PublisherCanadian Science Publishing
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories; Nunavut
NTS95H/14; 95O/11; 120E/05
AreaTable Mountain; Fort Simpson; Alert
Lat/Long WENS-64.0000 -62.0000 82.5000 82.2500
Lat/Long WENS-120.5000 -120.5000 63.0000 62.7500
Lat/Long WENS-123.5000 -123.0000 63.7500 63.5000
Subjectssurficial geology/geomorphology; environmental geology; Nature and Environment; permafrost; freezing ground; ground ice; ground temperatures; climate, arctic; terrain sensitivity; Climate change
Illustrationslocation maps; plots; tables
Released2012 08 01
AbstractClimate and ground temperature records up to 30 years in length from permafrost monitoring sites in a polar desert at Alert, Nunavut, and a boreal forest at Table Mountain, Northwest Territories, were analyzed by season and year to assess the ground thermal response to recent climate warming. Methods were developed to standardize incomplete ground temperature data sets and to hindcast air temperatures for comparative analysis. The timing and magnitude of climate warming varied, beginning in the 1960s in the Mackenzie Valley and the 1970s in the High Arctic. Ground temperature increases occurred in both regions but varied in magnitude and timing in relation to the external forcing and permafrost conditions. Significant increases in winter air temperatures in both regions appear to be largely responsible for recent increases in ground temperature, particularly at the polar desert sites where snow cover is minimal.

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