# sea_ice Section

This section configures **sea ice dynamics**, including **friction**, **elasticity**, and **concentration thresholds**.

---

 | **Parameter** | **Description** |
 |---------------|----------------|
 | `ice_flag` | Flag to enable/disable sea ice (`TRUE`, `FALSE`). |
 | `ice_dynamic_flag` | Flag to enable/disable dynamic sea ice (`TRUE`, `FALSE`). |
 | `ice_cover_file` | File for ice cover. |
 | `ice_elasticity_file` | File for ice elasticity. |
 | `TimeStep` | Time step for sea ice (default: `60 s`). |
 | `MomentumSolver` | Momentum solver for sea ice (`0`, `1`, `2`, `3`). |
 | `Rheology` | Rheology model for sea ice (`0`, `1`). |
 | `ice_friction_flag` | Flag to enable/disable ice friction (`TRUE`, `FALSE`). |
 | `ice_polygons_file` | File for ice polygons (free format). |
 | `ice_polygons_data` | File for ice polygons data. |
 | `ice_shelves_raster` | Raster file for ice shelves cover. |
 | `ice_concentration` | File for ice concentration. |
 | `ice_concentration_threshold` | Threshold for ice concentration (default: `0.5`, dimensionless). |
 | `ice_confinement_modulation` | Modulation for ice confinement. |
 | `ice_friction_type` | Type of ice friction (`LINEAR`, `QUADRATIC_CD`, `QUADRATIC_Z0`, `MULTIPLICATOR`). |
 | `ice_shelves_friction_type` | Type of ice shelves friction (`QUADRATIC_CD`, `QUADRATIC_Z0`, `MULTIPLICATOR`). |
 | `sea_ice_friction_type` | Type of sea ice friction (`LINEAR`, `QUADRATIC_CD`, `QUADRATIC_Z0`). |
 | `ice_shelves_multiplicator` | Friction factor applied below ice shelves (default: `2.0`, dimensionless). |
 | `ice_linear_friction_coefficient` | Linear ice friction coefficient (default: `2.5e-3`, dimensionless). |
 | `ice_quadratic_friction_coefficient` | Quadratic ice friction coefficient (default: `2.5e-3`, dimensionless). |
 | `ice_karman_rugosity` | Karman rugosity for ice (default: `1.0e-4`, dimensionless). |
 | `ice_friction_smoother` | Smoother for ice friction (`LEGACY`, `QUICK`). |
 | `ice_smoother_niterations` | Number of iterations for ice smoother (default: `50`). |