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TitleGround ice map of Canada v.1: national-scale mapping of relict, segregated, and wedge ice abundance in permafrost
AuthorO'Neill, H B; Wolfe, S A; Duchesne, C
SourceArctic Change 2020; 2020, 1 sheet
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20200481
MeetingArctic Change 2020; Dec 7-10, 2020
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, ground ice
Mediaon-line; digital
RelatedThis publication is related to O'Neill, H B; Wolfe, S A; Duchesne, C; (2020). Ground ice map of Canada, Geological Survey of Canada, Open File 8713, ed. version 1
File formatpdf
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Subjectssurficial geology/geomorphology; environmental geology; Nature and Environment; Science and Technology; permafrost; ground ice; periglacial features; segregated ice; wedge ice; relict ice; climate change
ProgramClimate Change Geoscience, Permafrost
Released2020 12 01
Abstract(unpublished)
We present and discuss 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 modelling by O’Neill et al. (2019) (https://doi.org/10.5194/tc-13-753-2019), and informed by published values of ground ice content and expert knowledge. The modelling employs existing national-scale datasets on surficial geology, paleovegetation, deglaciation, and permafrost distribution, coupled with an expert-system approach implemented in a geographic information system to calculate relative abundance of relict, segregated, and wedge ice. Volumetric excess ice content in the upper 5 m of the ground for each ice type is then estimated based on values reported in the literature, and raster algebra is used to produce a map of total ice content. 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. It provides a foundation for hypothesis testing related to broad-scale controls on ground ice formation, preservation, and melt. Additional compilation of quantitative field data on ground ice, and improvements to national-scale surficial geology mapping will allow further assessment and refinement of the representation of ground ice in Canada. Continued research should focus on improving the lateral and vertical representation of ground ice for incorporation into Earth system models and decision-making. Spatial data files of the mapping are freely downloadable from GEOSCAN: https://doi.org/10.4095/326885.
GEOSCAN ID327310