This dataset contains climate model output from Deutches
Klimarechenzentrum (DKRZ) in Germany. The model output consists
of monthly mean grids for several variables from three runs of
the ECHAM4 model. The three runs are a control (constant
atmospheric forcing) run, a greenhouse gas run which
assumes a compounded 1% per year increase in CO2, and
an aerosol run which combines CO2 and
sulphate aerosol concentrations. The model is run at T42
resolution, resulting in a 128 by 64 latitude/longitude gaussian
output grid (approximately 2.8-degree by 2.8-degree
resolution). The grids are in GRIB format (Edition 1).
DSS has computed decadal means for each decade-month from the
monthly mean grids. The decade means are computed from 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).
