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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).
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