The second generation General Circulation Model (GCMII) at the Canadian Climate Centre was used to run a CO2 experiment in which the current climate (1xCO2) was compared with a new equilibrium climate obtained with twice the amount of atmospheric CO2 (2xCO2). The model was run around November 1989 at T32 resolution, and several surface parameters and 500mb heights were output on a 3.75-degree resolution grid. For the globe, DSS has monthly 20-year climatologies of some surface parameters. Format information is available as additional info.