The 3D ocean model HYCOM and the sea-ice model CICE is developed at the University of Miami and Los Alamos National Laboratory. The models are fully coupled at each time step. Output are the surface variables sea level and ice conditions (concentration, thickness, velocity, convergense, strength, etc.) and 3-dimensional maps of current, temperature and salinity at sigma levels.

The DMI HYCOM-CICE set-up covers the Atlantic, north of about 15°S and the Arctic Ocean, with a horizontal resolution of about 4-5 km in the Arctic Ocean and in Greenlandic waters and lower resolution to the south to about 10 km. Model forcing is ECMWF weather forecasts. A 144 hour forecast is produces twice daily, at 00 and 12 UTC.

Model area	Atlantic/Arctic
Horisontal resolution	~4-10 km
Time step: barotropic baroclinic sea ice	5 sec 90 sec 180 sec
Atmospheric forcing	ECMWF
Tidal forcing	8 constituents
Data assimilation	Sea surface temperature Sea-ice concentration (L2) (L3 for backup/polarportal)
Boundary conditions	Levitus climatology Altrimetry climatology

Further reading:
Ponsoni, L., Ribergaard, M.H., Nielsen-Englyst, P., Wulf, T., Buus-Hinkler, J., Kreiner, M.B., and Rasmussen, T.A.S., 2023. Greenlandic sea ice products with a focus on an updated operational forecast system. Frontiers in Marine Science, 10, doi:10.3389/fmars.2023.979782.
Madsen, K.S., Rasmussen, T.A.S., Ribergaard, M.H., and Ringgaard, I.M., 2015. High resolution sea ice modelling and validation of the Arctic with focus on south Greenland waters, 2004-2013. Polarforschung, 85 (2), 101-105, doi:10.2312/polfor.2016.006.