In this case...
...circular logic is using a model to establish a "scientific fact". Then using that "scientific fact" to prove that models are useless.
Hey, I'm not saying there's nothing interesting in the piece, or that everything it says is wrong. I agree with the piece to this extent: models are just models and cannot predict the future with sufficient accuracy. [I'm not going to muddy this discussion by going into my non-model-based reasons to be very concerned about carbon-dumping and global warming.]
But when I see a piece of humorously bad logic, I can't help but point it out. It's a nerdy character flaw of mine. It's probably a character flaw related to some folks inability to perceive bad logic when it supports their beliefs.