Mohn-Sverdrup Center for Global Ocean Studies and Operational Oceanography

Founded 20th October 2004.

Leader Group:
Johnny A. Johannessen, Laurent Bertino

Further development, implementation and validation of modules in the Nansen/TOPAZ ocean modelling and data assimilation system in order to improve our knowledge of ocean processes, ocean circulation and increase our forecasting capabilities.

Ocean forecasting systems require both advanced data assimilation techniques and high-resolution coupled bio-physical ocean models. There are however technical limitations due to the large computational costs and memory requirements of 3D ocean models so that the Mohn-Sverdrup Center strategy has concentrated on the use of advanced data assimilation techniques (the Ensemble Kalman Filter, EnKF) and gradual increase of the model resolution.


  • Large-scale and high-resolution regional ocean modeling
  • Development and application of advanced data assimilation methodologies
  • Coupled physical and biogeochemical modeling for basin scale and coastal systems
  • Dissemination of ocean forecasts to the public
  • Education and training of a new generation of "ocean forecasters"

Left: Modeled sea surface temperature, Right: Chart of the TOPAZ data assimilation system

The Mohn-Sverdrup Center acknowledges an endowment of 25MNOK by Trond Mohn c/o Frank Mohn AS, Bergen.