EH4_OPYC_SRES_B2_ACLCAC200

Project: IPCC Third Assessment Report ECHAM4/OPYC data setsThe project embrases the simulations with the coupled climate model ECHAM4/OPYC, relevant for the third assessment report (TAR, http://www.ipcc.ch/ipccreports/assessments-reports.htm) of the Intergovernmental Panel on Climate Change (IPCC).The IPCC has been established by WMO and UNEP to assess scientific, technical and socio-economic information, relevant for the understanding of climate change, its potential impacts and options for adaption and mitigation.A more detailed description about the work of the IPCC can be found at the IPCC homepage ( http://www.ipcc.ch ) and at ( www.grida.no/climate/ipcc ). As a further development the Special Report on Emission Scenarios (SRES, http://www.grida.no/Climate/ipcc/emission/) have been constructed, to describe (potential) future developments in the global enviroment with special reference to the production of greenhouse gases and aerosol precursor emissions.A set of four scenarios families (A1, A2, B1, B2) have been developed (see also http://www.grida.no/climate/ipcc/emission/index.htm ) The model output data are available at the World Data Center for Climate, Hamburg.( wdc-climate.de ). Projection of future trends based on selected emission scenarios are provided through this project for a great many model variables of ECHAM4/OPYC.For a selected set of variables the IDCC-Data Distribution Center provides additional data sets from a multitude of models that contribute to the IPCC-TAR report (project: IPCC_DDC_TAR).Summary: The SRES data sets were published by the IPCC in 2000 and classifiedinto four different scenario families (A1, A2, B1, B2).SRES_B2 storyline describes a world in which the emphasis is onlocal solutions to economic, social and enviromental sustainability.The global population is increasing at a lower rate than A2. It hasan intermediate level of economic development and a less rapid andmore diverse technological change than in A1 and B1.The model consists of the atmospheric component which based on theweather forecast model of ECMWF. The atmospheric component is thestandard model version of a 19-level hybrid sigma-pressure coordinatesystem.The ocean component is a model which computes with isopycnal coordinates.This data set is an enlargement of the IPCC data set and providesadditional meteorological parameters.The run produces 6h values of the variables.ECHAM4/OPYC3 (http://cera-www.dkrz.de/IPCC_DDC/SRES/ECHAM4/echam4opyc3.html )Changes af anthropogenic emissions of CO2, CH4, N2O and sulphurdioxide are prescribed according to the above mentioned scenario.The model run starts in 1990 from the results of the scenario runGSDIO (Experiment "EH4OPYC_22723GSDIO") which has been run withobserved conditions for the time period 1860-1990.