SIMULATED MAJOR CLIMATIC FEATURES OF SEA ICE IN THE NORTHERN HIGH LATITUDE REGION IN A GLOBAL SEA-SEA ICE AIR COUPLED MODEL

A global sea sea ice air coupled numerical model is used to simulate the main climatic features of sea ice in the northern high latitude region. Results show that the simulated seasonal variation of sea ice is rational. The model can reproduce the main characteristics of geographical distribution of sea ice in winter quite well, but the simulated sea ice concentration in summer near the Eurasian land in the inner arctic ocean is larger than the observation. The simulated sea ice concentration in winter shows evident interannual variability and the biggest variability occurs in Greenland Sea. These features are similar to the observation. Related to global warming effect, there is a diminishing trend in sea ice concentration in Greenland Sea since the beginning of the 1970s. But due to the vacancy of warming mechanism in the model, the diminishing trend in sea ice concentration doesn't show up in the simulation results.