Read here. As we have discussed many times before, climate models are basically worthless. The should be banned from any policy making decision process as they have proven to be exceedingly unreliable -their horrendously wrong predictions of snowfall for the Northern Hemisphere is the classic example. (click on image to enlarge)
"While some journalists insist that recent winter snows are proof of global warming effects, they miss the fact that models have been predicting less snow in the northern hemisphere....As we know, winter snow cover has actually increased about 5% since it bottomed in 1989, and is now close to a record maximum....So far, the climate models have the wrong polarity on their predictions of winter snow cover changes."