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We present new national-scale mapping of ground ice conditions in Canada, a product of Natural Resource Canada’s Climate Change Geoscience Program. The mapping depicts a first-order estimate of the combined volumetric percentage of excess ice in the top 5 m of permafrost from segregated, wedge, and relict ice. The estimates for the three ice types are based on previous modelling (https://doi.org/10.5194/tc-13-753-2019), and informed by published values of ground ice content and expert knowledge. The mapping offers an improved depiction of ground ice in Canada at a broad scale, incorporating current knowledge on the associations between geological and environmental conditions and ground ice type and abundance. Spatial data files of the mapping are freely downloadable from GEOSCAN: https://doi.org/10.4095/326885.
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Estimation of Maximum Lake Depth from the Surrounding Topography; towards a Regional Assessment of the Occurrence of Taliks below Arctic Lakes
Presenter: Anne-Marie LeBlanc
Open taliks, areas of unfrozen ground, are mainly found beneath large and deep lakes that do not freeze to their bottom.
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Resiliency Assessments of Adfreeze Pile Foundations Supporting Government of the Northwest Territories’ Buildings
Presenter: Ed Hoeve
An office-based assessment of the anticipated future integrity of adfreeze steel pipe pile foundations of selected Government of the Northwest Territories buildings was conducted.
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Long-Term Monitoring of Permafrost Temperature, Active Layer Thickness and Surface Settlement in the Mackenzie Valley, NWT
Presenter: Caroline Duchesne
A permafrost and active layer monitoring network, established in the Mackenzie Valley and Delta (NWT) by the Geological Survey of Canada, has been maintained since the 1980s.
