Summary of the Provided Article:

Subdivision of Snow Layers

The article discusses the subdivision of snow layers when the layer thickness exceeds the prescribed maximum thickness (Δzmax). The key points are:

Subdivision Criteria:
- If there is only one snow layer and its thickness is greater than 0.03 m, the layer is subdivided into two layers of equal thickness, liquid water and ice contents, and temperature.
- If there is an existing layer below the layer to be subdivided, the excess snow is combined with the underlying layer.
- If there is no underlying layer after adjusting the layer for the excess snow, the layer is subdivided into two layers of equal thickness, liquid water and ice contents.

Temperature Calculation:
- The vertical snow temperature profile is maintained by calculating the slope between the layer above the splitting layer (T1) and the splitting layer (T2).
- The temperature of the lower layer (T3) is first evaluated using Equation 2.8.55, then adjusted based on the freezing temperature (Tf) using Equation 2.8.56.
- The temperature of the upper layer (T2) is then calculated based on the temperature slope.

After layer subdivision, the node depths and layer interfaces are recalculated using the relevant equations.