Articles | Volume 14, issue 12
The Cryosphere, 14, 4341–4364, 2020
https://doi.org/10.5194/tc-14-4341-2020
The Cryosphere, 14, 4341–4364, 2020
https://doi.org/10.5194/tc-14-4341-2020
Research article
02 Dec 2020
Research article | 02 Dec 2020

Ground ice, organic carbon and soluble cations in tundra permafrost soils and sediments near a Laurentide ice divide in the Slave Geological Province, Northwest Territories, Canada

Rupesh Subedi et al.

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Short summary
Permafrost beneath tundra near Lac de Gras (Northwest Territories, Canada) contains more ice and less organic carbon than shown in global compilations. Excess-ice content of 20–60 %, likely remnant Laurentide basal ice, is found in upland till. This study is based on 24 boreholes up to 10 m deep. Findings highlight geology and glacial legacy as determinants of a mosaic of permafrost characteristics with potential for thaw subsidence up to several metres in some locations.