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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.

The direct effect of CO2 is well-established physics, based on laboratory results, and known for over a century.[2]

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 [...]

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 [...]

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.

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 [...]

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 [...]

It’s already being used in NOAA press releases to repeat the same line about how a “new scientific study” supports the models. The aforementioned support is rather weakly phrased as being “broadly consistent” (which somehow means the same thing as being “90% certain” a catastrophe is on the way, right?).

But it gives them another chance to claim it’s been found:

This new paper extensively reviews the relevant scientific analyses — 195 cited papers, model results and atmospheric data sets — and finds that there is no longer evidence for a fundamental discrepancy and that the troposphere is warming.

It says something about how important the hot spot is that they keep “finding it”. (Even though they never seem to issue a press release saying it’s missing.) But since the data from the last warming spell came in ten years ago, there are only so many ways they can rehash the same numbers. So now they’re scraping the bottom of the barrel in desperation. This new study is not a “new scientific study”, it’s a new review. This paper tells us [...]

In the climate models, the critical hot spot is supposed to occur because (specific) humidity rises in the upper troposphere about 10km above the tropics. The weather balloons clearly show that temperatures are not rising as predicted, so it was not altogether surprising that when Garth Paltridge analyzed weather balloon results for humidity, and found that humidity was not rising as predicted either.

Indeed, he found specific humidity was falling, which was the opposite of what all the major climate models predicted and posed yet a another problem for the theory that a carbon-caused disaster is coming. He had a great deal of trouble getting published in the first place, but once he finally did get published and skeptics were starting to quote “Paltridge 2009″, clearly, Team AGW needed an answer.  “Dessler 2010″ is transparently supposed to be that answer.

To start by putting things into perspective, lets consider just how “spuriously” small, patchy and insubstantial the radiosonde measurements have been. According to NOAA The integrated Global Radiosonde Archive contains more than 28 million soundings, from roughly 1250 stations.

Worldwide radiosonde stations (NOAA)

… Or how about the [...]

The public might not understand the science, but they do understand cheating

Dr. David Evans 19 October 2010

[A series of articles reviewing the western climate establishment and the media. The first and second discussed air temperatures, the third was on ocean temperatures, and fourth discussed past temperatures, the fifth compared the alleged cause (human CO2 emissions) with the alleged effect (temperatures), the sixth canvassed the infamous attempt to “fix” that disconnect, the hockey stick, and the seventh pointed out that the Chinese, Russian, and Indian climate establishments [...]

It’s taken 21 months, four professors, and three associate/assistant professors, and THIS is the best they could come up with? The printed version listed no author (the pdf has been updated with John Cooks name*) yet wears the logo of the University of Western Australia (UWA), which will embarrass that university as word spreads of the intellectual weakness of their “Guide“.

Did UWA commission this piece of rather inept, qualitative “feel-good” science and clumsy reasoning? Stephan Lewandowsky invited John Cook to speak at UWA and “offer assistance“.

The booklet uses a mislabeled graph with a deceptive scale, won’t show the damning graphs it supposedly debunks,  assumes positive feedback occurs despite the weight of empirical evidence against it (Douglass, Spencer, Lindzen), and repeats irrelevant information even though The Skeptics Handbook describes why rising sea levels and glaciers and ice sheets can’t possibly tell us what causes the warming. It misleadingly discusses a different fingerprint — one that isn’t the key point and isn’t disputed by skeptics. Cause and effect are mixed up, and naturally there are strawmen arguments to unnecessarily destroy for the spectacle of being seen to do something. To top it off, Cook still thinks a measurement is [...]