The SRES data sets were published by the IPCC in 2000 and classified
into four different scenario families (A1, A2, B1, B2).
SRES_A2 storyline describes a very heterogeneous world
with the underlying theme of self-reliance and preservation
of local identities. It results in this scenario a continous
increasing population together with a slower economic growth
and technological change.
The Hadley Centre Circulation Model is a 3-dim AOGCM described
by (Gordon et al., 2000 and Pope et al., 2000).
The atmospheric component has a 19 levels horizontal resolution,
comparable with spectral resolution of T42, while the ocean
component has a 20 levels resolution.
The changes of anthropogenic emissions of CO2, CH4, N2O and
sulphur dioxide are prescribed according to the above
These data belongs to a set of three ensemble runs, with the
HADCM3-model, using the SRES_A2 scenario. They provide monthly
averaged values of selected variables for the IPCC-DDC.
HadCM3_SRES_A2b and HadCM3_SRES_A2c follow the same experimental design
and historical plus future forcings as HadCM3_SRES_A2 (Johns et al.
2003) but starting from initial conditions taken respectively 100 years
and 200 years further into the HadCM3 control simulation.