The classic hot spot prediction (A) compared to 28 million weatherballoons (B). Click to enlarge. You won’t see this in the new report.
It was a major PR failure in 2007. The IPCC won’t make the same mistake again. They’ve dumped the hot-spot graphs.
In AR4 they put in two graphs that show how badly their models really do. In the next report they plan to bury the spectacular missing-hot-spot images through “graph-trickery” and selective blindness. Each round of IPCC reports takes the spin-factor up another notch. It’s carefully crafted.
See the draft of AR5: Chapter 9: Evaluation of Climate Models
It’s hot-spot hidey games and PR tricks
In the new extra-tricky AR5 version, the IPCC “quote the critics” and ignore them at the same time. That way they can say they include the McIntyre’s, McKitrick’s, Douglass’, and Christy’s: the words are on the page, but that doesn’t mean the information is used in the conclusions. The models have failed and they bury that undeniable result under the clutter. (You’ll need to read the fine print). There is no acknowledgement that this issue of the “hot spot” drives more amplification of predicted warming in their models than any [...]
Remember the evidence is overwhelming, and deniers deny the evidence. But in Oct 2012, two atmospheric scientists were reporting, yet again, the models are wrong. Twenty years after we started looking for the fingerprint of the amplification required to make the CO2 theory of global warming work, it still isn’t there. Forgive me for harping on. It’s still The Most Major Flaw in climate models.
Never heard of “the Hot Spot”? See the first post on the hot spot argument. The models are wrong (but only by 400%!) See how climate scientists admit it’s important and missing. See how they stoop to changing color scales on graphs to pretend they’ve found it and ignore 28 million weather balloons. Or just read the summary with scientific references I wrote in May.
Background: The assumption that was wrong
Researchers made an assumption that water vapor would amplify the direct warming of extra CO2 from a small harmless amount to a large catastrophe. They started with the theory that relative humidity would stay constant in a warmer world and the thicker layer of water vapor would warm the world even more. Greenhouses gases in this instance means mainly water [...]
It’s worse than we thought — again….
Fusulo and Trenberth scored headlines around the world recently with a new paper that suggested that a few models got the relative humidity right in some tropical spots, and they also happened to be the models that predicted the hottest global outcomes.
John Christie pointed out that the models with the highest climate sensitivity are also the ones which are the worst at predicting future temperatures.
But there is more to this. It is a likely a case of twenty models predicting 40 parameters, and you can take your pick of the permutations and combinations which give one or two models a “success” here and there on one or two factors. But in the end, as Richard Courtney says, all the models are different so only one model can possibly be The Right One for the whole atmosphere, and quite likely they are all wrong.
In this case, they are still all wrong. The hot spot is still missing, and the region below it with which they scored some success is not that important.
The words hot spot and humidity over the tropics lead many commentators to think this was something to do [...]
This is part of a series that Tony Cox and I are doing that references the most important points and papers, as a definitive resource about the evidence. The missing hotspot is not just another flaw in the theory, it proves the models are wrong: not just “unverified”, not just “uncertain”, but failed. Apologies to those who feel I harp on about this! This is a condensed review, squishing years of a scientific battleground down to it’s bare bones… — Jo
It is not well known that even the IPCC agrees that the direct effects of CO2 will only increase world temperatures by 1.2°C. All of the projections above that (3.3°C , 6°C etc) come from model projections based on assumptions of what water vapor and clouds will do (these are the feedback effects of the original 1.2°C).[i] Are the feedbacks correct?
If the IPCC models are right about the feedbacks, we would see a hot spot 10km above the tropics. The theory is that with more heat, more water will evaporate and rise, keeping relative humidity constant at all heights in the troposphere. The point has been conclusively tested with 28 million weather balloons since 1959.[ii]
Some people claim that I mislead people. But it seems they are the misled — not by me, but by their own heroes.
In the Skeptics Handbook I wrote:
“The greenhouse signature is missing If Greenhouse gases are warming the earth we are supposed to see the first signs of it in the patch of air 10 kilometers above the tropics. But this “hot spot” just isn’t there.
Weather balloons have scanned the global atmosphere but could find no sign of the predicted “hot-spot” warming pattern that greenhouse gases would leave.”
Sources: Sources: (A) Predicted changes 1958-1999. Synthesis and Assessment Report 1.1, 2006, CCSP, Chapter 1, p 25, based on Santer et al. 2000; (B) Same document, recorded change/decade, Hadley Centre weather balloons 1979-1999, p. 116 , fig. 5.7E, from Thorne et al., 2005
With all the benefits of hindsight, it stood up extremely well. (Damn, but I did do a good job )
There are claims I should not call it a “signature”, but here’s how it is: The top alarmist researchers called it a fingerprint or a signature, the graph explicitly states that the hot spot is the pattern caused by “well mixed greenhouse gases”, and basically, if [...]
A new brief summary of the reasoning and evidence behind the skeptics case. –Jo
The Skeptic’s Case Who Are You Going To Believe – The Government Climate Scientists Or The Data? Guest Post Dr David M.W. Evans
We check the main predictions of the climate models against the best and latest data. Fortunately the climate models got all their major predictions wrong. Why? Every serious skeptical scientist has been consistently saying essentially the same thing for over 20 years, yet most people have never heard the message — here it is, put simply enough for any lay reader willing to pay attention.
What the Government Climate Scientists Say
Figure 1: The climate models. If the CO2 level doubles (as it is on course to do by about 2070 to 2100), the climate models estimate the temperature increase due to that extra CO2 will be about 1.1°C × 3 = 3.3°C. 
The direct effect of CO2 is well-established physics, based on laboratory results, and known for over a century.
Feedbacks are due to the ways the Earth reacts to the direct warming effect of the CO2. The threefold amplification by feedbacks is based on the [...]
Fu and Manabe agree the hot spot is missing
GRL June 2011.
Yet another study hunted for a form of the missing hot spot– and again the results show the models are unable to make useful predictions.
The upward rising trend predicted in the models is of critical importance. The models assume that the 1.1 degrees of warming directly due to CO2 will be tripled by feedbacks from humidity and water vapor. Studies like Fu and Manabe are looking to see if the assumptions built into the models are right. If relative humidity stays constant above the tropics throughout the troposphere, we should see the upper troposphere warm faster than the surface.
Fu and Manabe used satellite data rather than weather balloons, and compared the tropical upper troposphere to the lower middle troposphere during 1979 – 2010. (Other papers I’ve written about compared the upper troposphere to the surface, and mainly used weather balloons.)
“One of the striking features in GCM‐predicted climate change due to the increase of greenhouse gases is the much enhanced warming in the tropical upper troposphere”
Satellites cannot separate out the altitudes at narrow resolutions, as the radiosondes can, but they produce reliable data [...]
Dr David Evans’ address to the Anti-Carbon-Tax rally, Perth Australia, 23 March 2011.
Good Morning Ladies and Gentlemen.
The debate about global warming has reached ridiculous proportions and is full of micro thin half-truths and misunderstandings. I am a scientist who was on the carbon gravy train, understands the evidence, was once an alarmist, but am now a skeptic. Watching this issue unfold has been amusing but, lately, worrying. This issue is tearing society apart, making fools and liars out of our politicians.
Let’s set a few things straight.
The whole idea that carbon dioxide is the main cause of the recent global warming is based on a guess that was proved false by empirical evidence during the 1990s. But the gravy train was too big, with too many jobs, industries, trading profits, political careers, and the possibility of world government and total control riding on the outcome. So rather than admit they were wrong, the governments, and their tame climate scientists, now cheat and lie outrageously to maintain the fiction that carbon dioxide is a dangerous pollutant.
Let’s be perfectly clear. Carbon dioxide is a greenhouse gas, and other things being equal, the more carbon dioxide in [...]
You’ll find this hard to believe but I get excited about the 1990 First Assessment Report (FAR). It’s very different from wading through the later ones, because it’s remarkably honest, and things are not hidden in double-speak (well, not so much). Scientists behave like scientists and talk of null hypothesis, and even of validating models. Indeed they had a whole chapter back then called “validation”. How times have changed.
This is the short summary of Chapter 8 “Attribution”
Thanks to Alan for sending me this link today (Chapter 8, IPCC FAR).
The “Attribution” Chapter is the part where they try to figure out what “caused” the warming. Chapter 8 says, essentially, “we don’t know, we might never know, our models don’t work, and we can conclude it might all be natural, but then again, it might not.” Got it?
This is in the same era that Al Gore was saying “the science is settled” and “there is no debate”.
What’s clear in 1990 from the FAR was that it was widely admitted that the models were bodgy, and that figuring out exactly what caused the recent warming was very difficult, indeed impossible at the time. There were too many variables, [...]
Vostok, Antarctica, Photo: Michael Studinger 2001
It appears the warming of the 20th Century has been done before. It’s just business as usual for the planet.
Frank Lansner has been hard at work again, and we’ve been discussing the Vostok ice cores. This time Lansner was looking to see if the current warming trend was unusual, and if there was evidence to support the high climate sensitivities the models suggest. As it happens, most of those high climate sensitivities that the models “estimate” come not from carbon dioxide directly, but from the feedbacks (the way the planet responds to any small change in temperature).
The models assume the net feedbacks are positive. These same feedbacks ought to have been working 100,000 years ago, and if so, there should be some hint of it in the ice cores. Lansner has been hunting for large swings in temperature during the periods when Earth was at a similar temperature to present day conditions — but what he finds is that the current claimed rise of 0.7 degrees C over the last century, even if it were true (and not exaggerated by thermometer [...]
17 contributors have published
1862 posts that generated