The second positive feedback mechanism also has to do with ice melting. (earthpolicy.org)
A system with a single positive feedback mechanism, or with multiple feedbacks all positive, always leads to instability and the system will go to one extreme and stay there. (climateaudit.org)
In either case, Copenhagen may well mark the beginning of the end of full - blooded climate alarmism, unless convincing evidence shows that the proposed positive feedback mechanisms on which the models, the IPCC and the whole climate change industry is built is real rather than just a hypothetical construct. (climatescience.org.nz)