Summary of the article:

## Ice Content in Snow Layers

The article discusses the conservation equation for the mass of ice in snow layers, which is governed by the following factors:

1. Ice accumulation from precipitation or frost, and ice loss from sublimation (q_ice,i-1)
2. Phase change (melting rate) (Δw_ice,i/Δt)

The term q_ice,i-1 is calculated in two steps:

1. Immediately after determining the rate of solid precipitation reaching the ground (q_grnd,ice), a new snow depth (z_sno) is calculated based on the snow density (ρ_sno), which is a function of atmospheric temperature and wind speed.
2. After calculating surface fluxes and snow/soil temperatures, the ice content of the top snow layer (w_ice,snl+1) is updated for frost or sublimation.

The article also discusses the following:

- Snow water equivalent (W_sno) is capped at 10,000 kg/m^2, and any excess frost is added to the ice runoff term.
- If the updated ice content (w_ice,snl+1) becomes negative, the ice content is reset to zero, and the liquid water content is reduced accordingly.

The detailed equations and their explanations are provided in the article to describe the ice content dynamics in the snow layers.