The current version of the ATM component (RegCM 4.3.5.6) does not allow to change the land-use type. The model crashes when the land-use type and masking is changed.
The handling of the sea-ice field is added to the mod_update.F90 (in RegCM). Now, RegCM changes the land-sea mask and land-use type back and forth when the ice is appeared and melted in the ocean model.
The current version of the ATM component (RegCM 4.3.5.6) does not allow to change the land-use type. The model crashes when the land-use type and masking is changed.