DOI: 10.1594/wdcc/eh4opyc_sres_a2_prec
title: EH4OPYC_SRES_A2_PREC

description: Project: IPCC Data Distribution Centre : Third Assessment Report data sets
The Intergovernmental Panel on Climate Change (IPCC) has been established by WMO und UNEP
to assess scientific,  technical and socio-economic information, relevant for the
understanding 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 this
section 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 Special
Report on Emission Scenarios (IPCC 2000, SRES) or published model studies using data from
these scenarios.
Six alternative IPCC scenarios (IS92a to f) were published in the 1992 Supplementary Report
to the IPCC Assessment. These scenarios embodied a wide array of assumption affecting how
future greenhouse gas emissions might evolve in the absence of climate policies beyond
those already adoped.
The SRES scenarios have been constructed to explore future developments
in the global enviromental with special reference to the production of greenhouse gases
and aerosol precursor emission.
A set of four scenario families (A1, A2, B1, B2) have been developed that each of this
storylines describes one possible demographic,  polito-economic, societal and technological
future. Model experiments, also using different forcing scenarios, were calculated
at other modeling centres.
Emissions Scenarios. 2000 ,Special Report of the Intergovernmental Panel on Climate Change
Nebojsa Nakicenovic and Rob Swart (Eds.)
Cambridge University Press, UK. pp 570
Summary: 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
those already adoped.
The SRES scenarios have been constructed to explore future developments
in the global enviromental with special reference to the production of greenhouse gases
and aerosol precursor emission.
A set of four scenario families (A1, A2, B1, B2) have been developed that each of this
storylines describes one possible demographic,  polito-economic, societal and technological
future. Model experiments, also using different forcing scenarios, were calculated
at other modeling centres.
Emissions Scenarios. 2000 ,Special Report of the Intergovernmental Panel on Climate Change
Nebojsa Nakicenovic and Rob Swart (Eds.)
Cambridge University Press, UK. pp 570
Summary: 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 model consists of the atmospheric component which based
on the weather forecast model of ECMWF. The atmosphere 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://cera-www.dkrz.de/IPCC_DDC/SRES/ECHAM4/echam4opyc3.html).
This data set is an enlargement of the IPCC data set and provides
additionel meteorological parameters.
The run produces monthly averaged values of the variabeles.
Changes of anthropogenic emissions 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.