THE COUPLED LARGE-SCALE OCEAN CIRCULATION AND SEA-ICE MODEL

The primitive equation ocean general circulation model developed by au thors [2], is coupled with a modified ''zero level'' version of Semtne r (1976) thermodynamic sea ice model, The results of numerical experim ents with 1D z-coordinate coupled ice-ocean model as well as with 3D m odel of 15 degrees S - 80 degrees N North Atlantic with 5 degrees x 5 degrees x 10 levels resolution are under consideration Integration is carried out for 100 model years. The coupled ice-ocean model simulates qualitatively well the climatic seasonal thermohaline ocean structure as well as the ice thickness and temperature, although the model abys sal temperature is 1 - 2 degrees C higher then the observed one. The m ain sea ice effect in the polar region is connected with seasonal fres h water flux cycle and leads to vertical turbulence intensification an d simulated temperature decrease. The remote sea ice response of ocean model is revealed as a thermohaline vertical dipole near the southern boundary.