This chapter reviews some of the carbon dioxide–climate sensitivity studies to analyze effect of carbon dioxide on climate. The carbon dioxide-induced change of the atmospheric temperature is analyzed based upon the results from radiative, convective models of the atmospheric-surface system. A general circulation model of climate is elaborated as a prognostic system of equations representing the physical and dynamical processes, which control climate. A brief description of climate as simulated by the Manabe–Stouffer model is presented. The climatic effect of the increase in carbon dioxide concentration is discussed based upon analysis of the differences between the two statistically stationary states which emerge from the 1×CO2 and 4×CO2 experiments. The distribution of the carbon dioxide-induced change in a global model climate is discussed. The latitudinal and seasonal variation of the signal-to-noise ratio for the carbon dioxide-induced change of zonal mean surface air temperature over continents is also illustrated.
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