Predicting Future Climates
Leaving aside the almost-intransitivity property of climate, we now consider what is meant by climate predictability. Recall that we had set out to quantitatively determine the changes to the climate of the earth that will result from changes in future emissions of greenhouse gases. Simply put, we want to estimate the magnitude of future global warming.
An astute observer of weather and weather forecasts might raise the point that since 10-day weather forecasts are essentially useless for planning purposes, it is audacious and absurd for meteorologists to pretend they can predict anything 1 year, much less 50 years, into the future.