In CMIP5 („Coupled Model Intercomparison Project Phase 5“) all current questions about mechanisms and characteristics of climate change are being studied. An important improvement in CMIP5 is the integration of idealized experiments to understand decisive climate processes like clouds, short runs starting from common initial conditions for exploring decadal prediction, and the incorporation of new model diagnostics, which leads to a better comparison of model results to satellite data.

CMIP5 promotes a standard set of model simulations in order to:

  • evaluate how realistic the models are in simulating the recent past
  • provide projections of future climate change on two time scales, near term (out to about 2035) and long term (out to 2100 and beyond)
  • understand some of the factors responsible for differences in model projections, including quantifying some key feedbacks such as those involving clouds and the carbon cycle
  • understand cloud feedbacks and other climate processes

The following experiments about different issues were elaborated and calculated with the MPI-ESM:

  • baseline experiments: for example historical climate simulations (from 1850 to 2005)
  • future projections of climates associated with different scenarios (from 2100 to 2300)
  • decadal climate predictions
  • the role of the carbon cycle for climate changes
  • the more distant past, for example the last glacial maximum or from 850 to 1850
  • idealized experiments, including aqua-planets and realistic planets with idealized forcings

The standardized experiments were carried out by 20 climate modeling groups from around the world with their respective climate model or Earth system model.


Further information:

Opens external link in current windowCMIP5-Projekt

Press release