The SRES data sets were published by the IPCC in 2000 and classified

into four different scenario families (A1, A2, B1, B2).

SRES_B2 storyline describes a world in which the emphasis is on

local solutions to economic, social and enviromental sustainbility.

The global population is increasing at a lower rate than A2. It has

a intermediate level of economic development and a less rapid and

more diverse technological change than in A1 and B1.

The model consists of the atmospheric component which based on the

weather forecast model of ECMWF. The atmospheric component is the

standard model version of a 19-level hybrid sigma-pressure coordinate

system. The ocean component is a model which computes with isopycnal

coordinates.

ECHAM4/OPYC3(http://ipcc-data.org/gcm/models/tar/echam4opyc3.html ).

This data set is an enlargement of the IPCC data set and provides

additional meteorological parameters.

The run produces monthly averaged values of the variabeles.

Changes of anthropogenic smissions of CO2, CH4, N2O and sulphur

dioxide are prescribed according to the above mentioned scenario.

The model run starts in 1990 from the results of the scenario run

GSDIO (Experiment "EH4OPYC_22723GSDIO") which has been run with

observed conditions for the time period 1860-1990.