This dataset contains outputs from climate models at the Goddard Institute for Space Studies (GISS) for use in assessing the impact of increased atmospheric CO2 concentrations on the global climate. A global equilibrium run (1XCO2 and 2XCO2) was made in 1984. Monthly means and 10-year monthly, seasonal, and annual climatologies are available for numerous parameters. Most parameters are only available at the surface. There were also made a 100-year transient run and GISS "Scenario A" and "Scenario B" runs sometime in the mid-1980s. Parameter and format informations are given in the additional informations.