The Hockey Stick
In fact, McIntyre’s work was crucial in proving that Mann’s infamous "hockey stick graph" — the heart of the United Nations’ IPCC-3 report — was a fraud. -Jim Lacey, National Review
The SPM of the Third Assessment Report of the IPCC featured a hockey-stick that started about the year 1,000 AD with an abrupt increase in temperatures starting about 1850.
Statisticians Ross McKitrick and Steve McIntyre destroyed it by showing the methods used produced hockey-sticks from random numbers.
-Ken Haapala 
It was a simple image that caught on, but the reliability of the data on which it is based has been called into question by many in the scientific community, including proponents of anthropogenic climate change such as Hans von Storch of the University of Hamburg, who has called the stick model quatsch, or “nonsense.”
-Conrad Black
On the manipulation of past data, Dr. Lüning thinks the hockey stick was an error involving poor statistics and methods, with a “wish” for a certain outcome, reminding us that even Michael Mann has revised his charts.
The Medieval Warm Period has also been put back in the IPCC 5th Assessment Report.
Warming, Fraud
There was a minor scientific glitch. The hockey stick contradicted previous work that had concluded that there had been a "medieval warm period." In fact, it disagreed with a plot published by the IPCC itself a decade earlier (in its 1990 report) that showed pronounced warm temperatures from the years 1000 to 1400.
Environmentalist, Warming, Liberal, Narrative
A Swedish study found that the planet was warmer in ancient Roman times and the Middle Ages than today, challenging the mainstream idea that man-made greenhouse gas emissions are the main drivers of global warming. The study, by scientist Leif Kullman, analyzed 455 “radiocarbon-dated mega-fossils” in the Scandes mountains and found that tree lines for different species of trees were higher during the Roman and Medieval times than they are today. Not only that, but the temperatures were higher as well... Kullman also wrote that “summer temperatures during the early Holocene thermal optimum may have been 2.3°C higher than present.” The “Holocene thermal optimum was a warm period that occurred between 9,000 and 5,000 years ago.
Warming, Fraud, Narrative
The “hockey stick” was completely and thoroughly broken once and for all in 2006. Several years ago, two Canadian researchers tore apart the statistical foundation for the hockey stick. In 2006, both the National Academy of Sciences and an independent researcher further refuted the foundation of the “hockey stick.” The National Academy of Sciences report reaffirmed the existence of the Medieval Warm Period from about 900 AD to 1300 AD and the Little Ice Age from about 1500 to 1850. Both of these periods occurred long before the invention of the SUV or human industrial activity could have possibly impacted the Earth’s climate. In fact, scientists believe the Earth was warmer than today during the Medieval Warm Period, when the Vikings grew crops in Greenland.
Environmentalist, Warming, Fraud, Science
McIntyre and McKitrick created some meaningless test data that had, on average, no trends. This method of generating random data is called "Monte Carlo" analysis, after the famous casino, and it is widely used in statistical analysis to test procedures. When McIntyre and McKitrick fed these random data into the Mann procedure, out popped a hockey stick shape!
McIntyre and McKitrick’s work led to a U.S. Senate investigation that debunked Mann’s hockey stick theory that 1998 was the hottest year in the last 1,000. The Senate investigation also found the study of the social networking of the paleoclimatology world showed how close it was and how often a small group of scientists both co-wrote and peer-reviewed papers for each other. In addition, no statisticians were ever involved in their research work or peer review articles.
Warming, Fraud
Clear physical evidence of the existence of the Little Ice Age and theMedieval Warm Period. Claims to the contrary are false.
Chair of NAS Committee on Applied and Theoretical Statistics:
Mann Techniques Always Generate Hockey Stick from Random Data...
In 2006, Professor Edward Wegman of George Mason University, chair of the National Academy of Sciences’ Committee on Applied and Theoretical Statistics, headed a team of statisticians testing the methods used by Mr. Mann.
Professor Wegman testified before Congress that Mann’s faulty statistical techniques always produce the infamous hockey stick configuration, even from random data.
Environmentalist, Warming, Science
<4241> Wilson: I thought I’d play around with some randomly generated time-series and see if I could ‘reconstruct’ northern hemisphere temperatures. [...] The reconstructions clearly show a ‘hockey-stick’ trend. I guess this is precisely the phenomenon that Macintyre has been going on about.
Environmentalist, Warming, Fraud, Science, Un
We will review carefully the borehole database for deep high quality data that may shed some additional light on the full millennium in different regions. We might even think about different parameterizations for some of the best data. But it will be very difficult to make the MWP go away in Greenland.
Warming, Editorial, Science
Also in September, American Craig Loehle, a scientist who conducts computer modelling on global climate change, confirmed his earlier findings that the so-called Medieval Warm Period (MWP) of about 1,000 years ago did in fact exist and was even warmer than 20th-century temperatures.
Then I began to read the work of two Canadian researchers, Steve McIntyre and Ross McKitrick. They and others have shown, as confirmed by the National Academy of Sciences in the United States, that the hockey stick graph, and others like it, are heavily reliant on dubious sets of tree rings and use inappropriate statistical filters that exaggerate any 20th-century upturns. What shocked me more was the scientific establishment’s reaction to this: it tried to pretend that nothing was wrong. -Matt Ridley
Warming, Fraud
There was a minor scientific glitch. The hockey stick contradicted previous work that had concluded that there had been a "medieval warm period." In fact, it disagreed with a plot published by the IPCC itself a decade earlier (in its 1990 report) that showed pronounced warm temperatures from the years 1000 to 1400.
Warming, Fraud, Narrative
The National Academy of Sciences report reaffirmed the existence of the Medieval Warm Period from about 900 AD to 1300 AD and the Little Ice Age from about 1500 to 1850. Both of these periods occurred long before the invention of the SUV or human industrial activity could have possibly impacted the Earth’s climate. In fact, scientists believe the Earth was warmer than today during the Medieval Warm Period, when the Vikings grew crops in Greenland.
Environmentalist, Warming, Fraud, Science, Un
From the Climategatew 2.0 collection, Keith Briffa wonders out loud to Michael Mann whether he should participate in the 2007 National Research Council (often mistakenly referred to as the National Academy of Sciences) review of the hockey stick. Mann encourages Briffa, but tells him not to worry since its all arranged to produce the right outcome... The panel is solid. Gerry North should do a good job in chairing this, and the other members are all solid. Chrisy is the token skeptic, but there are many others to keep him in check
Environmentalist, Warming, Liberal, Science, Press, Corruption
The ‘Climategate 2’ emails disclose that in private some of those same scientists have had doubts about aspects of the global warming case. For example, Professor Phil Jones, the head of the CRU, admitted there was no evidence that the snows of Kilimanjaro were melting because of climate change, and he and his colleagues agreed there were serious problems with the famous ‘hockey stick’ graph – the depiction of global temperatures that suggests they were broadly level for 1,000 years until they started to rise with industrialisation.
Genghis Khan owes his place in history to a sudden shift in the Asiatic climate from the cold, arid period that immediately preceded his ascent as leader of the Mongol empire, to the warmer, wetter weather that allowed his horsemen to expand out from Central Asia. -Steve Connor
Environmentalist, Warming, Liberal, Fraud, Science, Oops, Corruption
Playing around therefore with the AR persistent structure of these time-series would make a difference. However, as these series are generally random white noise processes, I thought this would be a conservative test of any potential bias… The reconstructions clearly show a ‘hockey-stick’ trend. I guess this is precisely the phenomenon that Macintyre has been going on about.
Warming, Incompetence, Science, Oops
Professor Jones also conceded the possibility that the world was warmer in medieval times than now – suggesting global warming may not be a man-made phenomenon. And he said that for the past 15 years there has been no ‘statistically significant’ warming.
Environmentalist, Warming, Science
Current theories of the causes and impact of global warming have been thrown into question by a new study which shows that during medieval times the whole of the planet heated up.
It then cooled down naturally and there was even a 'mini ice age'. A team of scientists led by geochemist Zunli Lu from Syracuse University in New York state, has found that contrary to the ‘consensus’, the ‘Medieval Warm Period’ approximately 500 to 1,000 years ago wasn’t just confined to Europe.
Environmentalist, Fraud, Science, Academia, Corruption
But Richard S. Lindzen, a Massachusetts Institute of Technology professor of meteorology who disagrees with Mann's work, called the school's investigation a "whitewash." Lindzen was interviewed by the Penn State panel during its investigation. "Penn State has clearly demonstrated that it is incapable of monitoring violations of scientific standards of behavior internally," Lindzen said in an e-mail from France.
Hand pointed out that the statistical tool Mann used to integrate temperature data from a number of difference sources – including tree-ring data and actual thermometer readings – produced an "exaggerated" rise in temperatures over the 20th century, relative to pre-industrial temperatures.
Environmentalist, Warming, Liberal, Character, Fraud, Science, Narrative, Oops, Lie, Corruption
Had Marcott et al. used the end dates as calculated by the specialists who compiled the original data, there would have been no 20th-century uptick in their graph, as indeed was the case in Marcott’s PhD thesis. But Marcott et al. redated a number of core tops, changing the mix of proxies that contribute to the closing value, and this created the uptick at the end of their graph. Far from being a feature of the proxy data, it was an artifact of arbitrarily redating the underlying cores... Having been caught, Marcott and his colleagues have now recanted. On Easter Sunday, they published online responses to “FAQs” that included this stunner: [The] 20th-century portion of our paleotemperature stack is not statistically robust, cannot be considered representative of global temperature changes, and therefore is not the basis of any of our conclusions.
Environmentalist, Warming, Liberal, Scandal, Fraud, Science
Of course, the first thing you’ll notice is that both the MWP and LIA have indeed disappeared. In fact, temperatures appear to trend downward throughout the millennium until a sharp jump upward last century. But if you look closer, you’ll also notice that the “reconstructed” series terminates in 1980.
When I reached him I didn’t hand him the book to sign. I opened it and pointed to where it states he won the Nobel Peace Prize and asked him why he made that fraudulent claim. He looked as if I had hit him. -Michael Greer
Environmentalist, Warming, Character, Science, Oops
Per Geir Lundestad, Director, Professor, of The Norwegian Nobel Institute: 1) Michael Mann has never been awarded the Nobel Peace Prize. 2) He did not receive any personal certificate. He has taken the diploma awarded in 2007 to the Intergovernmental Panel on Climate Change (and to Al Gore) and made his own text underneath this authentic-looking diploma. 3) The text underneath the diploma is entirely his own. We issued only the diploma to the IPCC as such. No individuals on the IPCC side received anything in 2007... Lundestad goes on to say that, "Unfortunately we often experience that members of organizations that have indeed been awarded the Nobel Peace Prize issue various forms of personal diplomas to indicate that they personally have received the Nobel Peace Prize. They have not."
Warming, Liberal, Character, Fraud, Science, Oops, Lie
This morning, I called the Nobel Committee in Norway and asked whether Michael Mann had won a Nobel Peace Prize. The answer was a pretty emphatic “No.” -Charles C. W. Cooke, NRO
Environmentalist, Character, Fraud, Science, Oops
Geir Lundestad, Director, Professor, of The Norwegian Nobel Institute emailed me back with the following: "1) Michael Mann has never been awarded the Nobel Peace Prize. 2) He did not receive any personal certificate. He has taken the diploma awarded in 2007 to the Intergovernmental Panel on Climate Change (and to Al Gore) and made his own text underneath this authentic-looking diploma. 3) The text underneath the diploma is entirely his own. We issued only the diploma to the IPCC as such. No individuals on the IPCC side received anything in 2007." Lundestad goes on to say that, "Unfortunately we often experience that members of organizations that have indeed been awarded the Nobel Peace Prize issue various forms of personal diplomas to indicate that they personally have received the Nobel Peace Prize. They have not."
Environmentalist, Warming, Liberal, Science, Oops
Professor David Hand said that the research – led by US scientist Michael Mann – would have shown less dramatic results if more reliable techniques had been used to analyse the data. Prof Hand was among a group of experts charged with investigating the "climategate" email scandal that engulfed the University of East Anglia's Climatic Research Unit (CRU) last year... Prof Hand praised the blogger Steve McIntyre of Climate Audit for uncovering the fact that inappropriate methods were used which could produce misleading results. "The Mann 1998 hockey stick paper used a particular technique that exaggerated the hockey stick effect," he said.
Warming, Incompetence, Science, Oops
"Regarding the Hockey Stick of IPCC 2001 evidence now indicates, in my view, that an IPCC Lead Author working with a small cohort of scientists, misrepresented the temperature record of the past 1000 years by (a) promoting his own result as the best estimate, (b) neglecting studies that contradicted his, and (c) amputating another's result so as to eliminate conflicting data and limit any serious attempt to expose the real uncertainties of these data." -John Christy's testimony to the US House of Representatives Science, Space and Technology Committee in 2011