Simulation Protocols

Current versions of our protocols, divided by simulation round, and the tracking of all changes they have gone through.

ISIMIP3a/b protocol

Focus on impact model evaluation and improvement, and detection and attribution of observed impacts according to the framework of the IPCC WGII-AR5 Chapter 18. It includes a counterfactual “no-climate change baseline”: detrended climate + observed socio-economic forcing.

ISIMIP2a protocol

Focus on model validation, in particular with respect to the representation of impacts of extreme weather events and climate variability. Includes a common global observational climate data set and a global observational impacts data set, against which the models can be bench marked.

ISIMIP2b protocol

Focus on providing robust information about the impacts of 1.5°C global warming and related low-emission pathways, as required for the IPCC Special Report on this topic. Pre-industrial control runs are included to facilitate statistical comparison with a no-climate-change case.

FastTrack protocol

CLOSED: For documentation only - do not use for simulations!

Focus on providing cross-sectorally consistent projections of the impacts of different levels of global warming in the 21st century. First ISIMIP simulation round.