Professor David Frame and Dr Daithi Stone have produced a paper claiming the IPCC predictions in 1990 were successful and seem accurate.
Those who read the actual FAR report and check the predictions against the data know that this is not so.
They ignore the main IPCC predictions (the prominent ones, with graphs, in the Summary for Policymakers) They don’t measure the IPCC success against an IPCC graph or within IPCC defined “uncertainties”. They measure success against a “zero trend” — something they defined as any rise at all beyond what they say are the limits of natural variability (which they got from the very models that aren’t working too well). Circular reasoning anyone? Frame and Stone themselves say the IPCC models didn’t include important forcings, and may have been “right” by accident.
Why did Nature publish this strawman letter? It’s an award-winning effort in selective focus, logical fallacies, and circular reasoning to be sure, but does it advance our understanding of the natural world? Not so.
Frame and Stone have produced a Letter to Nature saying that 3 is a lot like 6 (they are both larger than zero). If you ignore the Summary for Policymakers, pick a line [...]
This is a rare unequivocal case of overreach.
Prof Matthew England proves he is either willing to stretch things beyond reason “for the cause”, or he doesn’t know what he is talking about, or both. Sarah Clark at the ABC didn’t do five minutes research on the story to check the facts or ask informed questions. This is not science, and it isn’t journalism either.
The Facts: The IPCC used the word “prediction” in 1990 and predicted a best estimate of 0.3°C with a range of 0.2°C – 0.5°C per decade Even with the most generous overestimate of current trends, the temperature trend has fallen below their lowest estimate, while CO2 emissions were higher than expected. The 1990 predictions can not be called “true”, “consistent” or to have “occurred” by any definition in any English dictionary. The IPCC Prediction was Wrong
The quote from the first page of the Executive Summary of the Summary for Policy Makers, FAR 1990:1
“Based on current model results, we predict:
Under the IPCC Business-as-Usual (Scenario A) emissions of greenhouse gases, a rate of increase of global mean temperature during the next century of about 0.3C per decade (with an uncertainty range of 0.2°C – [...]
Have the 1990 IPCC predictions been proved completely, unarguably and utterly wrong? Yes.
They predicted that if our emissions stayed the same, temperatures would rise by 0.3 C per decade, and would be at the very least 0.2, and the most 0.5. Even by the most generous rehash of the data, the highest rate they can find is 0.18 C per decade which is likely an overestimate, and in any case, is below the very least estimate, despite the world’s emissions of CO2 continuing ever higher.
Climate Scientist Matthew England called that “very accurate”. Since when did 0.18 = 0.3? (Shall we call it “climate maths”, or just call it wrong?) The IPCC had a whole barn wall to aim at, and a battalion of government funded gold plated AK-47s to hit the target, but they still missed.
Both England and the ABC owe Minchin an apology.
The un-Skepticalscience page uses a pea and thimble trick to argue the IPCC 1990 predictions were right (“Lessons from Past Climate Predictions: IPCC FAR”). As usual John Cooks site looks “technical” but uses complexity to hide the way they redefined the prediction in order to pretend it wasn’t wrong. Excuses excuses. Intellectual wordsmiths [...]
Bottom line: On Q&A Nick Minchin said the IPCC predictions were wrong. Matthew England said “Not true” their 1990 prediction was “very accurate”. But the IPCC predicted 0.3C per decade, and we got at most 0.18C per decade. (Forster and Rahmsdorf 2011 ) How is is “very accurate” when the result is below their lowest estimate?
Oceanographer Matthew England owes Nick Minchin an apology. Will Tony Jones correct the record on Monday?
How strange is this debate where politicians know the science better than the “scientists”?
The ABC Q&A program shows they have no interest in pursing the truth on climate change. The panel was, as always designed to push an agenda. Five believers, with a sixth in the audience, faced two skeptics. No skeptical scientists were invited to attend, let alone sit in the front row with a mike, like England who was called in so the warmists could get the last word on the science without fear that a skeptic might disputing their version of events. We can’t allow people to damage the faith of those duped ABC viewers.
Nick Minchin claimed there is a major problem with the [...]