Great page, as usual. My question is a general one about how current modeling attempts to account for non-linear climate change now being documented. (And I'm no climate scientist, so please pardon inadvertent inexactness, mis-use of technical terms, or other fumblings in this question.) But do models have built-in protocols to factor in the likelihood of conditions resulting from non-linear change — for example, the predictable effects onl air masses of rapid warming now underway in certain polar regions — or must we simply wait for 30-40 years, when climate "realities" resulting from these anomalies will have become part of historical norms?