I also think people need to come to understand that the scientific uncertainties work both ways. We don't understand cloud feedbacks. We don't understand air-sea interactions. We don't understand aerosol indirect effects. The list is long. Singer will say that uncertainties like these mean models lack veracity and can safely be ignored. What seems highly unlikely to me is that each of these uncertainties is going to make the climate system more robust against change. It is just as likely a priori that a poorly understood bit of physics might be a positive as a negative feedback. Meanwhile, the climate system overall is in fact behaving in a manner consistent with the GCM predictions. I have often wondered how our medical colleagues manage to escape the trap of having their entire science dismissed because there are uncured diseases and other remaining uncertainties. Maybe we can learn from the physicians.
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