Slide 19: Flux adjustments
Some GCMs do not correctly provide a stable equilibrium condition under current climatic conditions.
In order to ensure they accurately do so, a number of "flux adjustments" are provided.
These are non-physical correction constants that are used as correction factors to ensure that the models stay on track.
More recently, through intensive exploration of more exacting physical calculations, some models have been developed that do not flux adjustments.
Some non-flux adjusted models are now able to maintain stable climatologies of comparable quality to flux adjusted models.
Furthermore, there is no systematic difference between the outputs of flux-adjusted and non-flux-adjusted models in terms of internal climatic variability.