Sea Ice Characteristics in the Barents Sea: A Numerical Model Study Deterministic Transients. (Reannouncement with New Availability Information).

摘要

A dynamic-thermodynamic sea ice model (Hibler, 1979) is applied to the Barents Sea region. The model is driven by surface stresses and heat fluxes from the Navy Operational Global Atmospheric Prediction Systems (NOGAPS) data for 1983. Additional forcing in the form of monthly varying ocean currents and deep oceanic heat fluxes from the Hibler-Bryan ice ocean model is used. The model domain is bounded by Franz Joseph Land and Spitzbergen in the North and Novaya Zemlya in the east. Open boundaries exist between Spitzbergen and Norway and between Franz Joseph Land and Novaya Zemlya. The model grid resolution is 25 km and a 4 hour timestep is used. Model results show good agreement between the predicted ice edge advance and retreat when compared to the Navy/NOAA Joint Ice Center ice edge analysis. Several experiments were performed to determine the importance of the boundary between Franz Joseph Land and Novaya Zemlya. Results show that if the boundary is treated as a solid wall, the extent of ice in the Barents Sea is too large at all times of the year. Opening the boundary and allowing the outflow of ice resulted in a realistic movement of the ice edge, thus indicating that a significant amount of ice outflow occurs at this boundary.