Symbol Full name Description
Tmax/Tmin Soil temperature envelopes maximum and minimum soil temperature profiles over the year
MAGTp Mean Annual Ground Temperature at the top of permafrost mean annual ground temperature, taken at the top of the permafrost
ALT Active layer thickness maximum depth of the 0°C isotherm over the year, taken from the Tmax envelope (i.e. thaw only)
DZAA Depth of the Zero-Annual Amplitude where the two envelopes (Tmax and Tmin) meet within a margin of tolerance - 0.1 °C for the current analysis
BP depth to the Base of Permafrost where the temperature profiles intersect with the 0°C isotherm.
- Thermal offset the difference between the mean annual temperature at the ground surface and MAGTp
- Surface offset the difference between the mean annual temperature at the ground surface and the mean annual air temperature (MAAT)
ALT-DOY Date of the maximum thaw calculated from the evolution of daily temperature profile of each year