How a Physicist Became a Climate Truth Teller

After a stint at the Obama Energy Department, Steven Koonin reclaims the science of a warming planet from the propaganda peddlers

By Holman W. Jenkins. Excerpts:

"what the media and politicians and activists say about climate science has drifted so far out of touch with the actual science as to be absurdly, demonstrably false."

"In 2019 a report by the presidents of the National Academies of Sciences claimed the “magnitude and frequency of certain extreme events are increasing.” The United Nations Intergovernmental Panel on Climate Change, which is deemed to compile the best science, says all such claims should be treated with “low confidence.”"

"In 2017 the U.S. government’s Climate Science Special Report claimed that, in the lower 48 states, the “number of high temperature records set in the past two decades far exceeds the number of low temperature records.” On closer inspection, that’s because there’s been no increase in the rate of new record highs since 1900, only a decline in the number of new lows."

"In its first new assessment of climate science in eight years, the U.N. climate panel—sharer of Al Gore’s Nobel Peace Prize in 2007—will rule anew next year on a conundrum that has not advanced in 40 years: How much warming should we expect from a slightly enhanced greenhouse effect?

The panel is expected to consult 40-plus climate computer simulations—testament to its inability to pick out a single trusted one. Worse, the models have been diverging, not coming together as you might hope. Without tweaking, they don’t even agree on current simulated global average surface temperature—varying by 3 degrees Celsius, three times the observed change over the past century. (If you wonder why the IPCC expresses itself in terms of a temperature “anomaly” above a baseline, it’s because the models produce different baselines.)"

"Climate models “are not to the standard you would trust your life to or even your trillions of dollars to.” Younger scientists in particular lose sight of the difference between reality and simulation: “They have grown up with the models. They don’t have the kind of mathematical or physical intuition you get when you have to do things by pencil and paper.”"

"Mr. Koonin agrees that the world has warmed by 1 degree Celsius since 1900 and will warm by another degree this century, placing him near the middle of the consensus. Neither he nor most economic studies have seen anything in the offing that would justify the rapid and wholesale abandoning of fossil fuels, even if China, India, Brazil, Indonesia and others could be dissuaded from pursuing prosperity."

"The public now believes CO2 is something that can be turned up and down, but about 40% of the CO2 emitted a century ago remains in the atmosphere. Any warming it causes emerges slowly, so any benefit of reducing emissions would be small and distant. Everything Mr. Koonin and others see in the science suggests a slow, modest effect, not a runaway warming. If they’re wrong, we don’t have tools to apply yet anyway. Decades from now, we might have carbon capture—removing CO2 directly from the atmosphere at a manageable cost."