Cold region soil hydrology and runoff processes

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(1) Despite permafrost soils being frozen for the majority of the year, surprisingly little is known about the processes that act to redistribute water in the soil during this time. Evidence suggests that over-winter water movement strongly influences runoff the following spring. Using newly designed instruments capable of measuring solid and liquid water phases, experiments will be conducted in the Yukon, Northwest Territories and an experimental climate change facility to determine the factors that control the redistribution of water under freezing conditions. This will be the first experiment collecting real-time data of phase-change and water movement below freezing in permafrost soils. Data will be used to validate an existing numerical model, which will then be used to examine thresholds and conditions that encourage moisture migration in frozen soils.