they acknowledge the uncertainty about the Great Lakes outcomes
they do not see any uncertainty about greenhouse gasses being warming
they do acknowledge uncertainties about how much warming that will cause and how quickly, but they have a pretty good handle on the range of uncertainty for that
they don't say the science is settled
that's why they are still working on how regional climates will be affected. including the likely effects on the Great Lakes
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"IPCC said the topic was a nonlinear chaotic system were accurate modelling is not possible."
No, the IPCC would not say anything so vague and poorly defined as "the topic". Based on everything I've read, that they have said, they will be talking about the natural variation uncertainties and the chaotic nature of that. They know that the greenhouse gas warming signal will continue, underlying that natural variation. My paraphrase of that was "weather" is chaotic. Greenhouse gas warming is predictable, as a long term temperature trend, within a range of uncertainty.
