Tuesday morning catchup - a Man Made Climate Change special

1) Bishop Hill reports some odd coincidences in the reporting and publicising of Climate Change including on the BBC.


2) Watts Up With That has the text of a must read speech:

'Matt Ridley has graciously allowed me to repost his speech in entirety here. It follows below. If there’s one speech about the climate debate worth reading in your lifetime, this is it. Andrew Montford of Bishop Hill has also formatted the speech into a PDF file, with an improved version, better graphics, A5 format for printing by Mike Haesler here Ridley_RSA (PDF)  suitable for emailing, printing, and snail mail. Distribute both as widely as possible. The lecture was delivered with slides, Dr. Ridley has sent me the ones he considers key, and I have inserted them . For background on this prestigious lecture, here is the lecture web page, and here is what RSA is all about and the history since 1754.'

Here are a few of excerpts from the speech:

'What sustains pseudoscience is confirmation bias. We look for and welcome the evidence that fits our pet theory; we ignore or question the evidence that contradicts it. We all do this all the time. It’s not, as we often assume, something that only our opponents indulge in. I do it, you do it, it takes a superhuman effort not to do it. That is what keeps myths alive, sustains conspiracy theories and keeps whole populations in thrall to strange superstitions.

Bertrand Russell* pointed this out many years ago: “If a man is offered a fact which goes against his instincts, he will scrutinize it closely, and unless the evidence is overwhelming, he will refuse to believe it. If, on the other hand, he is offered something which affords a reason for acting in accordance to his instincts, he will accept it even on the slightest evidence.”

Lesson number 5: keep a sharp eye out for confirmation bias in yourself and others.

...

Experts are worse at forecasting the future than non-experts.
Philip Tetlock did the definitive experiment. He gathered a sample of 284 experts – political scientists, economists and journalists – and harvested 27,450 different specific judgments from them about the future then waited to see if they came true. The results were terrible. The experts were no better than “a dart-throwing chimpanzee”.
Here’s what the Club of Rome said on the rear cover of the massive best-seller Limits to Growth in 1972*:

“Will this be the world that your grandchildren will thank you for? A world where industrial production has sunk to zero. Where population has suffered a catastrophic decline. Where the air, sea and land are polluted beyond redemption. Where civilization is a distant memory. This is the world that the computer forecasts.”
“Science is the belief in the ignorance of the experts”, said Richard Feynman.

Lesson 6. Never rely on the consensus of experts about the future. Experts are worth listening to about the past, but not the future. Futurology is pseudoscience.

...

I am not a “denier”. I fully accept that carbon dioxide is a greenhouse gas, the climate has been warming and that man is very likely to be at least partly responsible. When a study was published recently saying that 98% of scientists “believe” in global warming, I looked at the questions they had been asked and realized I was in the 98%, too, by that definition, though I never use the word “believe” about myself. Likewise the recent study from Berkeley, which concluded that the land surface of the continents has indeed been warming at about the rate people thought, changed nothing.

So what’s the problem? The problem is that you can accept all the basic tenets of greenhouse physics and still conclude that the threat of a dangerously large warming is so improbable as to be negligible, while the threat of real harm from climate-mitigation policies is already so high as to be worrying, that the cure is proving far worse than the disease is ever likely to be. Or as I put it once, we may be putting a tourniquet round our necks to stop a nosebleed.

...

I was not always such a “lukewarmer”. In the mid 2000s one image in particular played a big role in making me abandon my doubts about dangerous man-made climate change: the hockey stick*. It clearly showed that something unprecedented was happening. I can remember where I first saw it at a conference and how I thought: aha, now there at last is some really clear data showing that today’s temperatures are unprecedented in both magnitude and rate of change – and it has been published in Nature magazine.

Yet it has been utterly debunked by the work of Steve McIntyre and Ross McKitrick. I urge you to read Andrew Montford’s careful and highly readable book The Hockey Stick Illusion*. Here is not the place to go into detail, but briefly the problem is both mathematical and empirical. The graph relies heavily on some flawed data – strip-bark tree rings from bristlecone pines — and on a particular method of principal component analysis, called short centering, that heavily weights any hockey-stick shaped sample at the expense of any other sample. When I say heavily – I mean 390 times.'

 There is so much more in this article, do read it all.


3) Watts Up With That has a long article reporting this Greenwire article that asks:

‘Why, despite steadily accumulating greenhouse gases, did the rise of the planet’s temperature stall for the past decade?”