NUMERICAL EXPERIMENT ON THE SEASONAL VARIATION OF GLOBAL OCEAN AND THE EL NINO PROCESS: ——PARTⅠ:CONTROL EXPERIMENT ON THE SEASONAL VARIATION OF GLOBAL OCEAN

A 6-layer,4°×5° horizontal resolution global ocean model has been designed and improved.After a 100-year integration,an equilibrium state has been reached from the upper to lower layers.By taking the mean state of last l0 model years as climatic state,we analyzed the characteristics of the seasonal variation in our model integration.The results show that the simulated seasonal variation is similar to the observed.So the design of our model is successful.Then,using the simulated climatic state of the seasonal variation as the initial state,and the observed stress and thermal state as the atmospheric forcing,we simulated the process of El Nino in 1972-1973 successfully.The simulated results of seasonal variation using our model will be presented in part Ⅰ.