EH4OPYC_SRES_B2_SNMEL

Project: IPCC Data Distribution Centre : Third Assessment Report data setsThe Intergovernmental Panel on Climate Change (IPCC) has been established by WMO und UNEPto assess scientific, technical and socio-economic information, relevant for theunderstanding of climate change, its potential impacts and option for adaption and migration.Projection of future trends for a number of key variables are provided through thissection of the DDC (http://www.mad.zmaw.de/IPCC_DDC/html/ddc_gcmdata.html).This information contained in either IS92 emission scenarios (IPCC 1992), the SpecialReport on Emission Scenarios (IPCC 2000, SRES) or published model studies using data fromthese scenarios.Six alternative IPCC scenarios (IS92a to f) were published in the 1992 Supplementary Reportto the IPCC Assessment. These scenarios embodied a wide array of assumption affecting howfuture greenhouse gas emissions might evolve in the absence of climate policies beyondthose already adoped.The SRES scenarios have been constructed to explore future developmentsin the global enviromental with special reference to the production of greenhouse gasesand aerosol precursor emission.A set of four scenario families (A1, A2, B1, B2) have been developed that each of thisstorylines describes one possible demographic, polito-economic, societal and technologicalfuture. Model experiments, also using different forcing scenarios, were calculatedat other modeling centres.Emissions Scenarios. 2000 ,Special Report of the Intergovernmental Panel on Climate ChangeNebojsa Nakicenovic and Rob Swart (Eds.)Cambridge University Press, UK. pp 570Summary: 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 sustainbility.The global population is increasing at a lower rate than A2. It hasa 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 isopycnalcoordinates.ECHAM4/OPYC3(hhttp://cera-www.dkrz.de/IPCC_DDC/SRES/ECHAM4/echam4opyc3.html ).This data set is an enlargement of the IPCC data set and providesadditional meteorological parameters.The run produces monthly averaged values of the variabeles.Changes of anthropogenic smissions 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.