Let’s examine, at a high and salient level, the positive-feedback Anthropogenic Global Warming, Green-House-Gas (AGW GHG) Heating Effect with its supposed pivotal role for CO2. The thinking is that a small increase in atmospheric CO2 will trigger a large increase in atmospheric water vapor. And then the combination of these two enhanced atmospheric constituents will lead to runaway (or at least appreciable and unprecedented) global warming. This theory supposes a powerful positive-feedback and overriding (pivotal) role for CO2.
But this theory is unproven. Nonetheless, it is hard-wired into all General Circulation Models of the climate. Models that attempt to predict the far future behavior of a “coupled, non-linear chaotic system”. One is compelled to consider that this modeling effort may, in fact, be impossible. Yet these Models constitute substantially the entire evidentiary basis for Anthropogenic Global Warming, as opposed to a great deal of evidence that points simply to Global Warming. Models, unsupported by observational evidence, are no evidence at all.
First, let me make the profound point that this Earth has gone through 60-70 known major climate transitions over many hundreds of millions of years. It did so while maintaining an exceptionally narrow thermal range (~+/- 6-10 OC) throughout all this history. This incredibly tightly controlled behavior can only be understood in the context of a system overwhelmingly dominated by negative-feedbacks. However, these negative-feedbacks are not represented in our current Modeling efforts and their investigation is underfunded to the point of being ignored.
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