NOTES ON DATA:
Datafiles with the appendix _logged refer to data collected half-hourly with thermistors. Refreeze and active layer data are field observations made using a frost probe or soil auger. Snow data was collected using typical snow survey techniques including depth and density measurements. The appendix _ag refers to files aggregating half-hourly data for multiple years into one representative year of daily data. The matlab file contains a program to predict permafrost degradation.
NOTES ON AUTHORSHIP:
Authorship on this dataset's code (i.e., MATLAB files) differs from dataset authorship. Code authorship and attribution belongs solely to Devoie, Élise G.
NOTES ON INSTRUMENTATION:
Ground temperature collected using CS 109 or CS 107 or RBR or HOBO U20 Thermistors. Refreeze and permafrost thaw measurements were made using a frost probe, and snow data was collected using a ESC_30 Geo Scientific snow tube. R studio was used to aggregate and analyze data, while the included program runs on the MATLAB platform.
NOTES ON ACCESS AND USE:
Research data in this study is open under a Creative Commons CC BY-NS-SA 4.0 license. Code is restricted. Please contact Laurier Library Research Data Services for more information.
NOTES ON BROWSING:
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NOTES ON DOWNLOADING:
Download the entire archive by choosing all files in the "Table" view.
Version Log:
1.0 - 20190315 - New, Published Dataset.
1.1 - 20191113 - Removed embargo on data and added related publication.
2.0 - 20200713 - Added new code and related publication; revised metadata.
A physically-based one-dimensional sharp-interface model of active layer evolution and permafrost thaw is presented. This computationally efficient, semi-analytical, non-equilibrium solution to soil freeze-thaw problems in partially saturated media is proposed as a component of hydrological models to describe seasonal ground ice, active layer evolution and changes in permafrost temperature and extent. The model is developed and validated against the analytical Stefan solution and a finite volume coupled heat and mass transfer model of freeze-thaw in unsaturated porous media. Unlike analytic models, the interface model provides a non-equilibrium solution to the heat equation while permitting a wide range of temporally variable boundary conditions and supporting the simulation of multiple interfaces between frozen and unfrozen soils. The model is implemented for use in discontinuous permafrost peatlands where soil properties are highly dependent on soil ice content and infiltration capacity is high. It is demonstrated that the model is suitable for the representation of variably saturated active layer and permafrost evolution in cases both with and without a talik.