An improved coupled ocean-atmosphere general circulation model and its numerical simulation

A global atmospheric general circulation model is coupled to a free surface tropical pacific oceanic general circulation model with the so-called 'linear statistical correction' synchronously coupling scheme. There is no obvious 'climate drift' in the coupled model, and the annual mean state and annual cycle are reasonable. It is shown that the simulated interannual variability of sea temperature reaches its maximum values in the subsurface Instead of sea surface and it propagates eastward along the equator and westward off the equator. The quasi-period of about three to five years is similar to that of the observed El Nino/Southern Oscillation.