A steady two-dimensional climate model with residual circulation

Based on dynamical energy transport and thermodynamic energy balance in the earth’s atmosphere-ocean system a steady two-dimensional climate model with residual circulation is proposed. In the model, we include some important physical processes with feedbacks such as ice caps-albedo, water vapor-temperature, etc. The simulated steady tempsrature field is very close to that of the real atmosphere. The numerical experiments show that doubling of the atmospheric carbon dioxide results in temperature increase of 1~2°C at the low latitude surface and 6~8°C at the high latitude surface. It is shown that a6% decrease in the solar constant is required for the — 10°C ice edge to move from its present latitude ~70° to~50°.