Climate Change Science....and Uncertainties

"Uncertainty can work both ways, since the changes and their impacts may be either smaller or larger than those projected." from Royal Academy of Sciences guide to climate change. The possibility that we are UNDERestimating what changes may occur, is brought up much less frequently than the skeptics view, that we are "probably overestimating what will happen".

And as we have heard before, modeling clouds adds the most uncertainty. From the Washington Post "Estimates range between about 2C and 4.5C for a doubling of carbon dioxide. Scientists are trying to narrow that spread, but climate modeling is exceptionally difficult, particularly when it comes to estimating the effects of clouds on the climate system."