Ground ice, geochemistry and soil properties of permafrost in the McMaster river basin, Resolute Bay, Nunavut, 2018 ...
Arctic permafrost has been rapidly degrading in the past decades, releasing nutrients, solutes and water into soils and freshwater ecosystems. Ground ice and its distribution is a fundamental aspect of permafrost systems, and a dominant factor in the response of permafrost soils to thaw. This datase...
| Main Authors: | , , , |
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| Format: | Dataset |
| Language: | unknown |
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Canadian Cryospheric Information Network
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5884/13197 https://www.polardata.ca/pdcsearch/?doi_id=13197 |
| Summary: | Arctic permafrost has been rapidly degrading in the past decades, releasing nutrients, solutes and water into soils and freshwater ecosystems. Ground ice and its distribution is a fundamental aspect of permafrost systems, and a dominant factor in the response of permafrost soils to thaw. This dataset presents ground ice contents, solute contents and soil properties of permafrost at eight sites in the McMaster river basin near Resolute Bay, Nunavut. Cores were collected at eight sites, chosen for their hydrogeomorphological setting. Site types can be separated into polar deserts (2) and patchy wetlands (6). Patchy wetlands were subdivided in Lake outflow (2), Riverine (1), Snowbank (1), and Groundwater (2) sites. The data shows that wetlands typically contain ice-rich syngenetic permafrost, were ice content is at least 2x the soil porosity, while polar desert sites and deeper layers of epigenetic origin contain ice contents approximating soil porosity values. Ground ice geochemistry could also be segregated ... : The dataset was developped to investigate ground ice content in various hydrogeomorphological settings. Each setting provides specific conditions for ground ice formation and accumulation, contributing to create particular permafrost histories. Permafrost cores were used to analyze cryostratigraphy and reconstitute permafrost formation history. The geochemistry was analyzed to understand the effect of different permafrost formation setting and history on the solute content of the ground ice, as these elements should be released during permafrost degradation and as ground ice melts, impacting the freshwater environments and the patchy wetlands. ... |
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