TOPAZ Ice Drift Forecast - Barents Sea

Click on images to get full resolution and other forecast variables.
For more information about the TOPAZ model suite, see the TOPAZ website.
This work is cofinanced by the Research Council of Norway trough the WIFAR project, the European Commission trough the SIDARUS project, and TOTAL E&P.




    Click here to view recent validation maps. It consists of forecast maps on which are superposed the true ice edge retrieved from OSI-SAF satellite data (the 15% concentration contour).


    Click here to view archived maps.

System description

    The Barents Sea model is based on the NERSC version 2.2.12 of HYCOM (HYbrid Coordinate Ocean Model). The grid is a conformal mapping with the poles located far from the domain so that the grid resolution is as uniform and isotroppic as possible. The horizontal resolution is approximately 5 km partially resolving the scale of baroclinic motion. Boundary conditions are obtained from the 10-days TOPAZ4 forecast free runs initialized from forecast with data assimilation. The Barents Sea model is forced with ECMWF forecasts and the free runs are launched every day at 21:30:00 CET and go from 00:00:00 GMT day+1 to 24:00:00 GMT day+3. Plotted variables are a daily average from midnight to midnight.
    The sea ice model uses the EVP formulation and a rheology specific to the marginal ice zone (MIZ). Because waves are not yet explicitly included in the system, the boundary between the two dynamical regimes is set at a concentration cutoff value (c=0.89). This is represented in the colorbar for ice concentration. The green zone represents compact ice in the viscous-plastic regime while the yellow-orange-red zone represents the collisional regime. The ice edge, usually diagnosed by the 0.15 contour is in the white zone while very low concentration ice is coloured in blue. This strategy of setting the boundary between the two regimes is based on the fact that in Barents Sea, areas of lower ice concentration are likely to be affected by ocean waves which break the ice cover into multiple floes interacting with each other, drastically affecting its dynamical nature.


  • 13.06.2012 :: Operational webpage is under renovation and will soon be relaunched.


Nansen Environmental and Remote Sensing Center
Mohn-Sverdrup Center

Last updated on Fri May 31 23:42:21 CEST 2013