cafeamericainmag.com
There has been a lot of CW discussion on climate change. This is an article written by someone that used to strongly believe in anthropogenic global warming and then looked at all the evidence before arriving at a different conclusion. The articles goes through what they did.
I thought a top-level submission would be more interesting as climate change is such a hot button topic and it would be good to have a top-level spot to discuss it for now. I have informed the author of this submission; they said they will drop by and engage with the comments here!
Jump in the discussion.
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Notes -
It's a little weird that the author repeatedly denies any experimental verification of the greenhouse effect but doesn't address the 19th century experiments that first identified it. Maybe there's something wrong with his results, but you wouldn't know it from reading this post.
I had a very negative reaction to this article. I think it reads much better with the following set up to contextualize it.
Start by contemplating the power of bench top science and theory. The partnership of bench top science and theory has some spectacular successes to its credit. You can experiment with Newtonian mechanics in your laboratory, verifying the basic laws. Then you get a top mathematician (Euler) to work out what those laws imply for gyroscopes. Later engineers build a gyrocompass for a submarine. Will this really work? Underwater? A thousand miles from the laboratory? Yes!
Or think of James Clerk-Maxwell, taking the bench top science of Ampere and Faraday and coming up with Maxwell's equations. The equations predict electromagnetic radiation. Hertz does the experiments in his laboratory and finds them; a great triumph for theory. Later Marconi takes this out into the real world. Theory shows that electromagnetic radiation goes in straight lines; Marconi's attempts at radio communication beyond the curve of the earth are not going to work. And sure enough they fail. Wut! Marconi actually succeeds! But rather than concede that there are problems getting out of the laboratory and into the real world, we discover the ionosphere and chalk it up as another spectacular success for the partnership of bench top science and theory.
Move on to contemplating the contrasting situation in medicine. The human body is too complicated for the human mind to comprehend. Basing medicine on theory works badly for the patient, no matter how much money it brings in for the doctor. This has lead to evidence based medicine. Never trust the combination of lab bench chemistry and theory. Always do a randomised controlled trial to check that medicines really work. Theory said that vitamin E was an anti-oxidant and would reduce oxidative stress and prevent cancer. Epidemiology confirmed this. Randomised controlled trials refuted it. Examples are so numerous that you can fill a book.
Returning to climate science, we must ask whether it is like gyroscopes or like Vitamin-E/Vioxx/vertebroplasty. Doing bench top science with an infrared spectroscope and a sample of Carbon Dioxide yields uncontroversial results. But does it have implications for the weather?
I've picked up the impression that every-one agrees on the importance of feedback loops. If you believed that climate science was a like a gyroscope, you would compute warming on the basis of the infrared characteristics of Carbon Dioxide and conclude that we are in for some warming, but not enough to constitute a crisis. No-one believes that climate science is like a gyroscope. Some think that warmer air means more water vapor which means more warming and more clouds and more clouds mean mumble. Subtle feedback in the atmosphere is putting us on a course for disaster. Others disagree.
The article emphasizes one particular disagreement. Scientists attempt empirical confirmation of the theory, but they mess it up. All the empirical work is heavily contaminated by theory. It cannot refute the theory because it assumes the theory.
For EM, straight-line propagation was a null hypothesis. Practical experiments rejected it, so the theory had to adapt. Science worked as intended.
For medicine, it’s a little trickier, because the category is defined by passing RCTs. The null hypothesis for any given treatment is that it doesn’t work; only those which can reject that are allowed into the category. Then anything which gets counted as effective must have some practical experiments behind it.
Flat Earthers object to the null hypothesis of, uh, Round Earth. In 2018, there was a documentary going around where one of them set up a practical experiment. Predictably for the rest of us, he failed to reject the hypothesis.
What’s the null hypothesis for climate skepticism?
The situation is different from EM or medicine because skeptics are unable to provide practical evidence of their own. After all, they’ve got all the same constraints as the IPCC—preexisting data, lack of a control group—but with less funding and less experience. Until they can move up a level and cite a practical experiment, they’re going to be stuck with the same kind of arguments as their opponents.
The flat earth documentary was fascinating because the guy actually proved the Earth was round in his experiment. Then they had to explain away their results and pretend it didn't happen.
Re: climate science, I think the situation is the same as with medicine. The default assumption on medicine is a new thing doesn't work. So you have to positively prove it. Only then can your intervention be recommended. For climate policy, it should be the same. You want to impose new taxes, de-industrialize (which industrialization has massively benefited humanity), ban synthetic fertilizer (which synthetic fertilizers are responsible for vast amounts of our food production), degrow the economy, etc? Then you have to actually prove, definitively, there is an issue, and that your policy would work.
This is not the state of affairs today. Today it's just presumed that the climate alarmists are right. If you question it they say "the science is settled" and smear you as a "denier" (which grew out of the "Holocaust denier" term). They've flipped the burden of proof in the public and policy sphere. But that's not how science is done. The person proposing the theory is the one that needs to prove it. It's not up to others to falsify it.
That being said I'm working on an experiment that could actually definitively falsify the GHE. Will see how it goes!
Out of curiosity, what's the experiment?
Essentially a repeat of Wood's 1909 experiment (http://www.wmconnolley.org.uk/sci/wood_rw.1909.html), except actually measuring the solar insolation and the backradiation with a pyranometer and pyrgeometer, respectively. Then experimentally measuring heat losses due to conduction and convection. Finally seeing if these add-up as they should on the different setups (IR-opaque glass vs IR-transparent rock salt). So we'll see definitively whether added backradiation causes warming or not.
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