Prediction AKA guessing by professionals
Just jumping the track a bit, I haven't found any long term predictions even across a relatively small area to be too accurate, ie. this year in England in march they predicted a long hot summer due to a sunny first week, cue constant rain for six and a half weeks, followed by another smashing week of sunshine. And all the papers threw out a prediction for a record breaking summer (they were right about records being broken, most rain in July, August and September for decades) with expected temperatures in the 30c area but if I recall correctly, ( which I probably don't) we only got two days above thirty. Then it started again, of course this is weather, and not climate, but with a massive, semi-chaotic system to predict I feel we still have a hell of a long way to go before we can predict anything accurately.
FYI as a test this year I played a game, I predicted the next day's weather based on the weather yesterday. I was more accurate than the met office with a multi million pound computer.. Of course that was a very localised forecast, and when the weather pattern changed suddenly my predictions were rubbish. Usually the met office was too
Sorry for the digression, but cliff notes version: we have a hell of a lot of difficulty predicting anything. Climate change is no different. One day maybe, but not today.. And probably not for fifty years (whoops predicting there!)