A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Those policies will cause HOW much cooling exactly? The best case fantasy a mere 0.17C by 2100

Suppose we give billions to the bureaucratic geniuses in Paris. Suppose they are right about how global warming works (though we know they are not). What do we get for all that money?

Combined, all plans, carried out, successful best case, at a cost of hundreds of trillions + : 0.17°C

More realistic more pessimistic case: 0.05°C

If the infra-red reroutes through the atmosphere and climate sensitivity has been overestimated by 5 – 10 fold: 0.02°C

The UN wants us to spend $89 trillion by 2030 to “green up” everything. For that we hope in theory, if we’re lucky to get a reduction of one sixth of a degree 70 years later. Rush, Rush, buy that plan today! Order two, and don’t count the dead.

The real reduction, using the best empirical data, and a corrected basic model, is more likely to be in the order of one thousandth of a degree 9 decades from now.


Hottest July in 4000 years? Not even the hottest July since *2014* according to satellites

NOAA has a press release out being picked up around the world. For example, the DailyMail, UK, is saying July was the hottest month since records began in 1880 as heatwaves swept the Earth’s countries and oceans. Other silly tabloids have headlines about this being the hottest July in 4,000 years, as if we have even the remotest idea what the average July global temperature was in the days of Plato.

Better data shows July this year is the hottest since way back in…  2014. It’s not 4,000 years, not 135 years, it’s the hottest July since the last one. We only have 30 years of good climate data: the satellites tell us the pause is real, and last month’s summer temperatures is not a record anything. According to the UAH and RSS global satellites, lower troposphere averages for July 2014 were 0.30C and 0.34C, compared to July 2015 of 0.28C. Even, June 2015 was hotter (UAH, 0.35C; RSS, 0.39C). July 2015 is not even the hottest month since June.

But some journalists will believe anything. Anthony Sharman, sports journalist,, Australia, thinks we know the global temperature of the July that Jesus was born. Who’s a gullible journalist then? [...]

A rare sighting of endangered scientific graph in newsprint

We skeptics get excited about unusual things. The Australian published Michael Asten today in the Op-Ed pages, and took the extremely rare step of publishing a scientific graph (!) with a few error bars and everything. Newspapers publish economic graphs all the time, so it’s nice to see the scientific debate getting a bit more sophisticated than just the usual “deniers are evil, government climate scientists speak the word of God” type of stuff. (In the Enlightenment, data was a greater source of authority than any human; how we pine for those days.) The only thing the story should have added was a note that reminds us that the not only was the “hottest” record not beyond the error bars but that it did not occur in satellite measurements. I’m sure a lot of people mistakenly think that NASA might use satellites, but they prefer highly adjusted ground thermometers next to airport tarmac instead.

The headline on that graph could have been “Climate scientists don’t know what caused most of the big moves on this graph”. Some mystery effect caused the warming from 1910-1940. In ClimateScienceTM it is OK to call that “natural variability” and pretend to be 95% sure [...]

Gavin Schmidt now admits NASA are only 38% sure 2014 was the hottest year

I said the vaguest scientists in the world lie by omission, and it’s what they don’t say that gives them away. The “hottest ever” press release didn’t tell us how much hotter the hottest year supposedly was, nor how big the error bars were. David Rose of the Daily Mail pinned down Gavin Schmidt of NASA GISS to ask a few questions that bloggers and voters want answered but almost no other journalist seems to want to ask.


Nasa climate scientists: We said 2014 was the warmest year on record… but we’re only 38% sure we were right

Nasa admits this means it is far from certain that 2014 set a record at all 

Does that mean 97% of climate experts are 62% sure they are wrong?*

The thing with half-truths is that they generate a glorious fog, but it has no substance. Ask the spin-cloud of a couple of sensible questions and the narrative collapses. This is the kind of analysis that would have stopped the rot 25 years ago if most news outlets had investigative reporters instead of science communicators trained to “raise awareness”. (The media IS the problem). If there was a [...]

2014, NOAA NASA produce weakest science on hottest fantasy in modern record

The Art of Lying by Omission

Back in the old days, when scientists had standards, they would never get excited over one hot year and certainly not over one meaningless hundredth of a degree.

The NOAA and NASA spinmeisters are parsing their press releases carefully, using vagueness to speak in half-truth-tongues. They utter no outright lie, yet misinform the crowd with lies by omission.

NOAA and NASA don’t say their models still don’t work, that the world was supposed to be a lot warmer and the “pause” continues. Nor do they admit that it has been warmer before many times in history. They don’t say the warming trend started long before we pumped out CO2. They don’t mention how tiny the “record” is, so tiny it could, and probably will, disappear with the next man-made adjustment. They don’t mention that the record depends entirely on which dataset you pick, and better instruments, satellites, show it wasn’t a record. NASA may launch satellites, but they prefer a thermometer in a carpark or beside a runway for measuring temperatures.

All major global datasets, up to date. The pause is clear enough. The lower two lines are from satellites. Jan 2015 | [...]

Panic! 2014 hottest year ever (Not so fast, say the satellites)

What’s almost as good as an actual record? A could-be-a-record Headline!

“2014 could become the hottest year on record” – said CBS, The Guardian, Time, Washington Post, Discover Magazine, The Japan News, Wired, and 319 other outlets.

 None of the investigative hardened editors or science reporters knew enough to ask the question, “what do the satellites say?” Which would have been interesting because the satellites say “bollocks”. h/t SPPI

On his site, Dr Roy Spencer explains that 2014 won’t be the warmest year on record. Satellites track almost all of the Earth for 24 hours a day and the data shows that we don’t need to go back to the Medieval Warm Period to find a hotter year, just back to 2010.


It might be the hottest year if you live in a white louvered box above a carpark, next to a concrete-heat-sink-superstructure, and not far from a runway. Though even then you might need to be homogenized and adjusted to really feel the heat. But for the rest of the surface of the Earth, 2010 is not a record, not even close.

It’s all pretty pointless anyway Roy points out — we’re arguing over a [...]

Even with the best models, warmest decades, most CO2: Models are proven failures

This beautiful graph was posted at Roy Spencer’s and WattsUp, and no skeptic should miss it. I’m not sure if everyone appreciates just how piquant, complete and utter the failure is here. There are no excuses left. This is as good as it gets for climate modelers in 2013.

John Christy used the best and latest models, he used all the models available, he has graphed the period of the fastest warming and during the times humans have emitted the most CO2. This is also the best data we have. If ever any model was to show the smallest skill, this would be it. None do.

Scores of models, millions of data-points, more CO2 emitted than ever before, and the models crash and burn. | Graph: John Christy. Data: KMNI.

Don’t underestimate the importance of the blue-green circles and squares that mark the “observations”. These are millions of radiosondes, and two independent satellite records. They agree. There is no wiggle room, no overlap.

Any sane modeler can only ask: “But how can the climate modelers pretend their models are working?” Afterall, predicting the known past with a model is not-too-hard; the modeler tweaks the assumptions, fiddles with the fudge [...]

Fourier Analysis reveals six natural cycles driving temperatures, no man-made effect: predicts cooling

Thermometer circa 1790

UPDATED: Post note below, with a couple of extra caveats…

Lüdecke, Hempelmann, and Weiss found that the temperature variation can be explained with six superimposed natural cycles. With only six cycles they can closely recreate the 240 year central European thermometer record. There is little “non-cyclical” signal left, suggesting that CO2 might have a minor or insignificant effect.

The three German scientists used Fourier analysis to pick out the dominant cycles of one of the longest temperature records we have. The Central European temperature is an average of records from Prague, Vienna, Hohenpeissenberg, Kremsmünster, Paris, and Munich.

The dominant cycle appears to be about 250 years. There is also a cycle of about 60 years, corresponding to the Atlantic/Pacific decadal oscillations.

Data is of course, always the biggest problem. If we had 10,000 years of high quality global records, we could solve “the climate” within months. Instead, we have short records, and Lüdecke et al, make the most of what we have. The European records are only 240 years long, or (darn) one dominant cycle, and only one region, so to check that the results are valid over longer periods they also analyze a the 2000 year Spannagel Cave [...]

Has the world started cooling? Hints from 4 of 5 global temperature sets…

I’m not keen on short term trends at all, they have a habit of flicking in and out of statistical significance with each month’s new data, or even switching from cooling to warming. But for what it’s worth, and only time will tell, perhaps the world entered the downswing of the PDO cycle in temperatures circa 2005.

If the world was entering a gently cooling phase, this is what it would look like

Syun Akasofu pointed out that there was a simple 60 year oscillation of global temperatures (about 30 years of warming, about 30 years of mild cooling) on top of a long slow rise that started more than 200 years ago. He predicted that we were at the top of one of the cycles, and were about to see the beginning of a cooler cycle. This early data suggests he may be right.

See the little red dot with the green arrow at about the 2010 mark. Dr Syun Akasofu

The cooling for the last eight years is statistically significant in 4 of the 5 major air temperature datasets. One, UAH, shows a small (statistically insignificant) rise since 2005.

And here’s the political point: how many of [...]

Skeptic win: UK Met Office quietly drops prediction by 20%, hopes no one notices

Joint Post: Jo Nova and James Doogue

The UK Met Office are completely impartial about global warming, and delighted that things are not going to warm as fast as they thought. So to draw attention to the good news they waited to release it on the … quietest possible news-day of the year. Oh. But remembering that they are public servants, they had to settle for the second quietest, and release it on the day before Christmas instead.

These are the people who said the science was settled, and the deniers were wrong, except that it wasn’t and they weren’t.

Unfortunately for the Met boys, the skeptics noticed (h/t Tallbloke and Richard Smith), and now, not only do they have to handle the heat of that partial reversal , now they also have to admit the cheap PR trick backfired — they were caught in a cowardly attempt to hide the news. Busted.  See Bob Tisdale here for very nice graphs.

Graph from The Australian. (Don’t blame me for the decadel’s – sic)

This has been picked up now by Daily Mail, GWPF, Delingpole, The National Post (Canada) and this weekend, The Australian.

Daily Mail

 “To put it mildly, it [...]