Well, the main feedback mechanism that I can see being a major influence in the beginning chaos is that of albedo. In short, atmospheric warming causes more wat

Well, the main feedback mechanism that I can see being a major influence in the beginning chaos is that of albedo. In short, atmospheric warming causes more water vapour higher in the atmosphere, causing higher and denser clouds - which will reflect most light and energy and prevent it from reaching the surface. This in turn could cause snow and ice cover on the ground, due to lowered surface temperatures, which would feed further into a cooling system. You'd expect to see this effect most prominently in continental rain shadow areas, particularly at altitude. Frankly, the outcome is unknowable, there are too many variables, both known and unknown. The only element which does seem inevitable is that there will be major changes to human civilisation. Oh - one thought I did have was blanketing the Arctic in artificial icebergs - just big white floating plastic platforms, millions of them.