 (see numerical implementation).</li><li><code>initial_conditions</code>: an instance of a WAVI.jl <code>InitialConditions</code> object that stores initial data on the ice thickness, ice viscosity, ice temperature, and ice damage.</li><li><code>fields</code>: an instance of a WAVI.jl <code>Fields</code> structure that stores information relating to the current state of the model on the various grids used in the solution (see numerical implementation for more information on these grids)</li><li><code>extra_