The snowpack can hold a certain amount of liquid water before draining. Snowmelt and rainwater are allowed to infiltrate into the frozen organic soil. The snowpack can make a huge difference in soil freeze thaw. An earlier deep snow can delay soil freeze up significantly. A deep snowpack in spring can delay soil thaw.
All curves are from the literature.
Model Inputs Drivers daily max and min air temperature daily precipitation daily PAR insolation daily average relative humidity Initialization tree sapwood volume per ha.