| Title | Modelling ground ice in permafrost using a paleogeographic approach |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | O'Neill, H B ;
Wolfe, S A; Duchesne, C |
| Source | Geological Survey of Canada, Scientific Presentation 95, 2019, 1 sheet, https://doi.org/10.4095/314593  Open Access |
| Image |  |
| Year | 2019 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf (Adobe® Reader®) |
| Province | Canada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut;
Canada |
| NTS | 1; 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 |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Subjects | surficial geology/geomorphology; environmental geology; permafrost; ground ice; modelling; paleogeography; glacial history; deglaciation; vegetation; sediments; climate; glaciers; Geographic data;
Geographic information systems |
| Illustrations | geoscientific sketch maps |
| Program | Climate Change
Geoscience Permafrost |
| Released | 2019 04 11 |
| Summary | (Plain Language Summary, not published)
New models depict ground ice in permafrost in Canada. The models use a new approach to calculate ground ice abundance in a geographic information system.
Datasets of surficial geology, deglaciation, paleovegetation, glacial lake and marine limits, and modern permafrost distribution represent past environmental changes. Abundant massive ice is modelled in the western Arctic, preserved since
deglaciation in continuous permafrost. Segregated ice is distributed in fine-grained soils, occurring in highest abundance in glacial lake and marine sediments. The modelled abundance of wedge ice reflects the exposure time of terrain to cold air
temperatures following deglaciation, and is highest in the western Arctic. The model outputs reproduce observed regional ground ice conditions and are generally comparable with previous mapping. However, the new models are more detailed and better
reflect observed ground ice conditions. |
| GEOSCAN ID | 314593 |
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