Soil properties of ice-wedge pseudomorphs and the encompassing sediments in a recently formed drained basin in Old Crow Flats, Yukon, Canada
Abstract
In 2019, a thermokarst lake located in low-shrub polygonal tundra in the Old Crow Flats (Yukon, Canada) drained catastrophically, forming a 1.9km2 drained basin containing a residual pond covering 32% of the basin and corresponding to the deepest parts (2-3 m) of the former lake. In the south-western part of the basin, the youngest part where bank erosion was strongest, a polygonal network was visible after drainage. In the troughs of the polygonal network, ice-wedge pseudomorphs were found in 2022-2023. Ice-wedge pseudomorphs are thermokarst structures that form by the secondary infilling of sediment in deformed cavities left by the melting of ice wedges. The pseudomorphs that were found formed during the expansion of the former lake and differ greatly in composition from the encompassing sediments. This dataset reports the soil properties of seven pseudomorphs and their encompassing sediments (i.e. lake-bottom sediments) that were unearthed at increasing distance from the southwest shoreline to study their composition and morphology.
Data citation
Gagnon, S., Roy-Léveillée, P. 2023. Soil properties of ice-wedge pseudomorphs and the encompassing sediments in a recently formed drained basin in Old Crow Flats, Yukon, Canada, v. 1.0. Nordicana D124, doi: 10.5885/45873CE-1868D8B97EB04118.
Location map
Key references
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Roy-Léveillée, Pascale, and C. R. Burn. “Near-Shore Talik Development beneath Shallow Water in Expanding Thermokarst Lakes, Old Crow Flats, Yukon.” Journal of Geophysical Research: Earth Surface 122, no. 5 (2017): 1070–89.
DOI: https://doi.org/10.1002/2016JF004022
Contributors
Turner, Kevin
Brock University
Acknowledgements
We thank Robert Linklater and Nicole Corbiere for their help during fieldwork. We also thank Polar Knowledge Canada, the Natural Sciences and Engineering Research Council of Canada, and the Weston Foundation for their support. Finally, we are grateful to the village of Old Crow, its inhabitants and the Vuntut Gwitchin First Nation for welcoming us and supporting our research.
Version history
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Version 1.0 (2022–2023)Updated December 22, 2023
You can request an older version by contacting nordicana@cen.ulaval.ca
Measurement sites
| Site | Latitude | Longitude | Altitude (m) | |
|---|---|---|---|---|
| Bassin drainé | 67.921833 | -139.482571 | 303 | More info |
Download
Data available for download are in ZIP format. Please properly cite the data when using it.
Gagnon_and_Roy-Leveillee_IWP Get file
Sites
Data
Gravimetric water content
08/2022 – 08/2022
Bulk density
08/2022 – 08/2023
Dry density
08/2022 – 08/2023
Organic matter content
08/2022 – 08/2023
Gravel content
08/2022 – 08/2023
Sand content
08/2022 – 08/2023
Silt content
08/2022 – 08/2023
Clay content
08/2022 – 08/2023
Mean grain size
08/2022 – 08/2023
Grain size sorting
08/2022 – 08/2023
Grain size skewness
08/2022 – 08/2023
Grain size Kurtosis
08/2022 – 08/2023