"One lesson we learned from dynamics is that you change the underlying conditions of dynamics system, in this case, the heating, then you can cause the attractor of the dynamical system, in this case, is the climate to suddenly disappear and one gets a sudden jump from one attractor to another in this case from one climate to another. And so you see how with a slow gradual change in the underlying conditions you can cause a sudden and abrupt jump in the state of the system in the climate and in this case, would be an environmental catastrophe." 
Prof. David Rand