Within an international consortium of partners from highly recognized research institutions in France, Germany and Norway, NERSC proposes completely new sea ice model developments related to ice dynamics. These will be tested/evaluated/validated at a regional scale using a high-resolution (~4km) coupled ice-ocean model of the Barents and Kara Seas nested into the MyOcean Arctic forecasting system TOPAZ that runs on lower resolution (~10km) but at the global/Pan-Arctic scale. We also propose a new type of model to simulate sea ice dynamics in the Marginal Ice Zone (MIZ) at very-high resolution (~100m), using a discrete-element modeling approach. Our project is likely to improve the ice drift and deformation properties within both the ice pack and the MIZ. We will deliver new and robust sea ice velocity fields and sea ice dispersion characteristics for being used in any Lagrangian oil spill models that is designed to run in ice-infested waters of the Arctic region. The major expected outcome of this project will be an increase of the oil spill trajectory models accuracy in presence of sea ice, along with an estimation of the uncertainties in these trajectories.