Steven Koonin's Misuse of the Berner 2001 Geocarb III Model
Figure 3.3 from Steven Koonin, Unsettled A recent book by Steven Koonin called Unsettled: What Climate Science Tells Us, What It Doesn't, and Why It Matters attempts to show us that much of climate science isn't really settled at all, despite political claims to the contrary. On of the chief targets of his criticism is the use of models in climate science, and he argues that the predictions of these models are not being seen in empirical data, so we should not put much stock in what they say. Now before I continue, I want to acknowledge a couple things. First, the introductory chapters on how climate change happens as a result of changing greenhouse gas concentrations is quite good. I was actually particularly impressed with it, not just because it's accurate but because he offers some very helpful illustrations of how the science works that can be helpful for those just learning the science. Second, Koonin acknowledges that his evaluation of climate science is a bit one-s...