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TitlePermafrost
AuthorBonnaventure, P P; Smith, S L; Lamoureux, S F; Way, R G; Ednie, M; Bouchard, F; Fortier, D; Paquette, M; Godin, E
SourceFrom science to policy in the eastern Canadian Arctic: an integrated regional impact study (IRIS) of climate change and modernization; by Bell, T (ed.); Brown, T (ed.); 2018 p. 118-139
LinksOnline - En ligne (complete volume - volume complet, pdf, 26.2 MB)
Year2018
Alt SeriesNatural Resources Canada, Contribution Series 20170215
PublisherArcticNet (Québec, Canada)
Documentbook
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceNunavut
NTS15; 16; 25; 26; 27; 28; 29; 35M; 35N; 35O; 35P; 36; 37; 38; 39; 45; 46; 47; 48; 49; 55; 56; 57; 58; 59; 65A; 65H; 65I; 65P; 66A; 66H; 67D; 67E; 67H; 68; 69; 78; 79; 120; 340; 560
AreaEastern Arctic; Canadian Arctic
Lat/Long WENS-110.0000 -52.0000 84.0000 60.0000
Subjectssurficial geology/geomorphology; environmental geology; engineering geology; permafrost; ground ice; climate, arctic; temperature; ground temperatures; ecosystems; hydrologic environment; periglacial features; thermokarst; landslides; mass wasting; slope failures; models; thermal analyses; subsidence; organic carbon; boreholes; active layer; climate change; permafost thaw; landscape evolution; greenhouse gases; carbon flux; carbon release; retrogressive thaw flows; infrastructures; buildings; geological hazards
Illustrationsgeoscientific sketch maps; schematic representations; photographs; location maps; graphs; time series; tables; satellite images; digital elevation models
ProgramPermafrost, Climate Change Geoscience
Released2018 01 01
AbstractPermafrost is defined as earth materials that remain at or below 0 °C for two or more years. The area that is subject to seasonal thaw above permafrost is known as the active layer. Permafrost may or may not contain ground ice, however, if it does, thaw can change the landscape substantially. This includes the development of thermokarst ponds, mass movements (including active layer detachment failures and retrogressive thaw slumps), the subsidence of roads, buildings and other infrastructure that might be built in these areas, as well as the release of organic carbon which may further accelerate climate warming. Permafrost in the IRIS 2 region varies in its susceptibility to climate change. Over the last two decades, long-term observations of permafrost temperatures in the northern part of the IRIS 2 region Canadian Force Station (CFS) have shown warming trends of between 0.3-0.5 °C/decade. Climate models for these areas suggest that this area will warm with considerable effect on both permafrost distribution and temperature between now and the end of this century.
Summary(Plain Language Summary, not published)
This contribution provides a summary of permafrost conditions in the Eastern Canadian Arctic, and is a chapter of the Integrated Regional Impact Study (IRIS) for the IRIS 2 region, a major outcome of the ArcticNet program. The chapter includes information on current permafrost thermal state for the region along with documentation of recent trends in permafrost temperatures. Potential impacts of changing permafrost conditions are also discussed as well as projections of future permafrost conditions. The information in the IRIS 2 report will provide critical information to better understand changing conditions in the region and inform development of adaption strategies in response to a changing climate.
GEOSCAN ID305997