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 GISS "Scenario A" run was made sometime in the mid-1980s. 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 global equilibrium run (1XCO2 and 2XCO2) in 1984, a 100-year transient run and GISS "Scenario B" run sometime in the mid-1980s. Parameter and format informations are given in the additional informations. Format information is available as additional info.