This dataset contains climate model output products from the United Kingdom's Hadley Centre for Climate Prediction and Research (HCCPR). The model output consists of monthly grids from five runs of HCCPR's HadCM2 model that were made in 1995. These runs were a control (constant atmospheric forcing) run, two greenhouse gas runs which assumed a constant compounded percentage per year (either 0.5% or 1%) increase in CO₂, and two aerosol runs which combined the CO₂ and sulfate aerosol concentrations. The model has a spatial resolution of 3.75-degree by 2.5-degree (96 by 73).

DSS has computed decadal mean grids for each decade-month from the monthly mean grids. The decade means are computed for years 0 through 9 of each decade. We also computed smoothed decadal means by computing 30-year running means of the decadal mean grids. Because of the large variability in the decadal means of variables such as precipitation, we recommend using the 30-year (smoothed decadal) means and applying them to the year at the middle of the 30-year period (i.e. - the 30-year mean for 2070-2099 should be applied at year 2085).