"Stocker and Schmittner's study concludes that the severity of a disruption in thermohaline circulation brought on by global warming will depend on the rate of warming and, hence, on the rate of greenhouse gas emissions. With a well-tested, coupled atmosphere-ocean climate model they show that, at present-day rates of carbon dioxide emission, thermohaline circulation will cease altogether by the time that atmospheric carbon dioxide concentration has doubled (to 750 p.p.m.v.). However, if carbon dioxide concentration increases more slowly, circulation will merely weaken with a doubling of atmospheric carbon dioxide concentration. The limits of climate models prevent exact predictions as it is impossible to include in the model all possible parameters and feedbacks. A particular source of uncertainty is change in precipitation, which is the deciding factor in thermohaline circulation shut-down."
THIS is the only true phrase in your comment. Your models don't begin to take into account all the drivers and sinks of the planetary heat budget. The sun's magnetic field has doubled. Where is THAT accounted for in your models?? It MUST have an effect--basic physics says that.