This is all pretty theoretical, and may be hard for some to follow. But the point is simple: even in purely theoretical terms, IPCC climate models are fatally flawed because they are too simple, and allow themselves to be driven by only a single variable, CO2, and assumptions of CO2 climate sensitivity expressed as a constant (which those models make wild guesses at).
Thankfully, we don’t have to trust only the theoretical reasons that the IPCC climate models are flawed. We have actual data. Global warming essentially stopped around 16-19 years ago. Even the traditional “97 percenters” have had to admit that. The models of the mid 1990s that the so called “97 percent” relied on have been falsified. Simple as that. So the modelers keep coming up with ad hoc and post hoc explanations for why the models didn’t work, none of which can actually be tested, and none of which fit all the available facts. And I thought spinning was limited to political consultants. Oh, I forgot… the whole global warming enterprise IS essentially a political one, not a scientific one. But I digress.
One way to read the attached article is as one explanation for why the known bad models didn’t work. In a way, all of the attempts by the 97 percenters to come up with explanations for why their models failed are an acknowledgement of the second equation in the article linked above, ∆T = k.log( ∆CO2) + f(∆x), where the last term, f(∆x), has nothing at all to do with CO2. Apparently, there is at least one such term in any equation that actually describes the reality we now know. Read the article. It should make at least some sense to you. The triangle is read as “change in.”
The point: CO2 is not the only, or probably even a major, variable in climate change, which is reality, and has always happened over sufficient time.
Unfortunately, a lot of people don’t seem to have caught up with the facts of the situation (namely, that global warming has stopped, the IPCC is dead wrong, but so much entrenched power and privilege is driving the global warming scam that it won’t die easily), and still believe the scare-mongering. It’s kind of sad, really.