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Mann's chart is dead and buried, exactly where it belongs. He's a fraud.
Now Flatulance, there have been studies using proxies from coral, sea bottom sediments, ice cores from Greenland and Anarctica, as well as other glaciers from around the world, and they have all confirmed the lumpy hockey stick.
Geological Society - June 2012
ny geologists recall that BritainÂ’s eminent climatologist, H.H. Lamb, documented a European medieval climatic optimum in which temperatures between 400 and 1200 AD were warmer than those of the 1960s to 1980Â’s. What they fail to recall is that Lamb also showed that China and Japan missed this warm phase (Climate, History and the Modern World, 1995, p. 171).
Michael Mann has inherited Lamb’s mantle. Mann uses proxy measurements of northern hemisphere climate extracted from tree rings, ice cores, corals and sediment cores to identify natural variations in the climate system (e.g. Nature 378, 1995, 266-270). By 1999, Mann and his team discovered from palaeoclimate analyses that the extent of medieval warming was likely about the same as it was in the mid 20th century, and much less than that since 1970. The data followed a curve reminiscent of a ‘hockey stick’. If Lamb had added his Chinese data to his UK data he might have got a similar result.
The ‘hockey stick’ was anathema to those who wanted ardently to believe that late 20th century warming was not anomalous and had nothing to do with our emissions of CO2. Controversy followed from the global warming nay-saying community, not least through A W Montford’s 2010 attack on Mann in The Hockey Stick Illusion. In the meantime, several peer-reviewed scientific studies by different authors have confirmed Mann’s original ‘hockey stick’ as being in the right ballpark, strongly suggesting that grounds for his impeachment are non-existent. Indeed, he was cleared of any wrongdoing by in-depth studies of his work by expert panels from the National Academy of Sciences (North, G.R., et al., 2006, Surface temperature reconstructions for the past 2000 years; National Academies Press, Washington DC), from his own university - Penn State, and from the US National Science Foundation. Like it or not, Mann remains a pioneer in analysing proxy records of climate change covering the past 1000 years, and one of the foremost young palaeoclimatologists of our time.
another review of Mann's book-
1.0 out of 5 stars A Tale of Two Hockey Stick War Books, March 11, 2012
By Robert Tamaki (Vancouver, BC) - See all my reviews
...Mann's methods were thoroughly repudiated by both Wegman AND the NAS panel
another review of Mann's book-
1.0 out of 5 stars A Tale of Two Hockey Stick War Books, March 11, 2012
By Robert Tamaki (Vancouver, BC) - See all my reviews
...Mann's methods were thoroughly repudiated by both Wegman AND the NAS panel
ROTFLMAO......a review of Dr. Mann's book by a random, unknown, unqualified reader on Amazon.....LOLOLOLOLOL.....how desperate can you get???....do you have any other straws you'd like to grasp at???
A review filled, as most denier rants are, with misinformation and debunked propaganda memes.
The study he refers to by Wegman was retracted by the journal that published it and many scientists have pointed out very serious flaws in Wegman's work.
Wegman scandal rocks cornerstone of climate denial
The National Research Council of the National Academies of Science issued a report in 2006 on Dr. Mann's hockey stick graph and they did not, as this idiot claims, "repudiate" Dr. Mann's methods. Here is the link to the NRC's news release on the report and here are some excerpts from that release.
"There is sufficient evidence from tree rings, boreholes, retreating glaciers, and other "proxies" of past surface temperatures to say with a high level of confidence that the last few decades of the 20th century were warmer than any comparable period in the last 400 years, according to a new report from the National Research Council. Less confidence can be placed in proxy-based reconstructions of surface temperatures for A.D. 900 to 1600, said the committee that wrote the report, although the available proxy evidence does indicate that many locations were warmer during the past 25 years than during any other 25-year period since 900.
The Research Council committee found the Mann team's conclusion that warming in the last few decades of the 20th century was unprecedented over the last thousand years to be plausible, but it had less confidence that the warming was unprecedented prior to 1600; fewer proxies -- in fewer locations -- provide temperatures for periods before then. The committee noted that scientists' reconstructions of Northern Hemisphere surface temperatures for the past thousand years are generally consistent. The reconstructions show relatively warm conditions centered around the year 1000, and a relatively cold period, or "Little Ice Age," from roughly 1500 to 1850. The exact timing of warm episodes in the medieval period may have varied by region, and the magnitude and geographical extent of the warmth is uncertain, the committee said. None of the reconstructions indicates that temperatures were warmer during medieval times than during the past few decades, the committee added. The scarcity of precisely dated proxy evidence for temperatures before 1600, especially in the Southern Hemisphere, is the main reason there is less confidence in global reconstructions dating back further than that.
The committee pointed out that surface temperature reconstructions for periods before the Industrial Revolution -- when levels of atmospheric greenhouse gases were much lower -- are only one of multiple lines of evidence supporting the conclusion that current warming is occurring in response to human activities, and they are not the primary evidence."
Really?
In a 2004 Technology Review article,[9] Muller supported the findings of Stephen McIntyre and Ross McKitrick in which they criticized the research, led by Michael E. Mann, which produced the so-called "hockey stick graph" of global temperatures over the past millennium, on the grounds that it did not do proper principal component analysis (PCA).[10] In the article, Richard Muller stated:Now tell us the AGW believer didn't say what he said.McIntyre and McKitrick obtained part of the program that Mann used, and they found serious problems. Not only does the program not do conventional PCA, but it handles data normalization in a way that can only be described as mistaken.He went on to state "If you are concerned about global warming (as I am) and think that human-created carbon dioxide may contribute (as I do), then you still should agree that we are much better off having broken the hockey stick. Misinformation can do real harm, because it distorts predictions."Muller's statements were widely quoted on skeptical blogs, and his status as a believer in global warming made his criticism of the "hockey stick" particularly damaging. In response, Mann criticized Muller on his blog RealClimate.[11] Marcel Crok, a reporter for the Dutch popular science magazine Natuurwetenschap & Techniek, later did a story on the incident.[12]
Now comes the real shocker. This improper normalization procedure tends to emphasize any data that do have the hockey stick shape, and to suppress all data that do not. To demonstrate this effect, 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!
That discovery hit me like a bombshell, and I suspect it is having the same effect on many others. Suddenly the hockey stick, the poster-child of the global warming community, turns out to be an artifact of poor mathematics. How could it happen?[9]
The OP was two lines of idiotic denier cult drivel, moron. Of course I read the article the OP linked to and it was about some studies of tree rings from some trees in Finland, right on the Arctic Circle. Since the Arctic regions tend to get warmer than the rest of the Northern Hemisphere during warm periods, as is being demonstrated now with Arctic temperatures rising faster and further than the rest of the world, it is not too surprising that tree ring data from that very localized region might show higher temperatures than what all of the other studies of many kinds of proxies, not just tree rings, have shown to be the generally slightly higher temperatures in the Northern Hemisphere during the MWP. So what? It clearly does not mean what the denier cultists at the Mail claimed it meant in their fraudulent headline. Nor does it mean what the overly ambitious lead researcher seems to want to believe it means. Results from one little area of Finland do not overturn or contradict the results of all of the other research done on temperature variations during the MWP.The topic of the thread is 'global warming', you crazy nitwit. Of course, the OP is garbage based on another denier cultist's stupidity and inability to comprehend the science but that is common to most threads started by deniers.
Hard to respond to confused and idiotic twaddle like that. Except to once again remind you that you a confused and clueless retard filled with propaganda, lies and misinformation.
LOLOLOL....too bad you're obviously too freaking stupid to understand the debate, no matter how hard you "work" at it.
Did you even READ the OP???
Strange -- because THIS STUDY FOUND the Medieval Warm Period and the Little Ice Age -- which were noticeably MISSING in the Mann-Briffa fabrication.. And this newer study finds a very slight COOLING trend in those trees you think were warming.
Now realize -- I weighed in on this topic by ridiculing tree ring studies.. But I don't DISMISS significant new studies like this one just because I don't like the results like some princesses do.
It is only because you are such a clueless retard who can't understand plain English that you would ask that. The "stupid denier cultists" I was clearly referring to are firstly, the reporter at the Mail who spun up that article and then secondly, you and that cretin, HereIGoMakingAFoolOutOfMyself, who started the thread - plus, of course, the walleyedretard and the kookster and all of the other denier cult retards who buy into this nonsense and propaganda without actually understanding anything about the scientific research that has been done..
You don't play nicely do you? Were you in special classes princess?
OK, little retard, if you read the OP's linked article, how it that you missed the part about the research being based only on some tree ring samples from Finland?
Total nonsense. The article the OP links to is a spun up piece of idiotic propaganda, purporting with its fraudulent headline to mean something it doesn't. It is about a very limited study of some tree ring data from one small, small area of far northern Europe and it actually has no new data about world wide temperatures during the MWP.The OP is about CORRECTING (as best as possible with the evidence) the tree ring studies that were RIGGED to leave out the MWPeriod. Need some help with that concept?
Here's a quiz for you genius. What is the ratio of the number of data points in the Mann/Briffa Hockey Stick for 400 years prior to the 20th century compared to the number of data points plotted for the 20th Century? Don't run off -- just tell me.
How much TREE RING DATA made up those 400 years of data FROM ONE FOREST IN SIBERIA !!!!! Think those were SMARTER TREES MORON?
You didn't answer a SINGLE question of mine.. So I'll take that as another NO -- you're not here to debate or discuss. Just to mug people and call names..
I'm not here to answer your questions, nitwit. I'm here to debunk your BS, which I have done pretty consistently whenever we have debated. Your moronic "questions" just reflect your ignorance and total misunderstanding of this issue.
As always, the disingenuous and contradictory claims of the confused denier cultists are amusing to watch. Most of the deniers will claim that the world has been warming up since the end of the last ice age and that's why temperatures are still going up but this article in the OP specifically states that the evidence that the researchers uncovered shows that generally the "world has been cooling for 2,000 years". Denier cultists can embrace both concepts at the same time without any cognitive dissonance only because they are such retards with little pea brains. LOLOLOL.
The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
Yes, I agree. Plant growth will be exceptional. Animal life will flourish and if history repeats itself wars will diminish. Man will enjoy a boom in culture (just like during the Roman and Medieval Warming periods) and hopefully we can get the technological boom to get us off of this single planet. << before the Methane outgassing in the Arctic blows the planet to smithereens. >>
Surely, surely,just look st the Mid-West at present to see proof of that.The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
Yes, I agree. Plant growth will be exceptional. Animal life will flourish and if history repeats itself wars will diminish. Man will enjoy a boom in culture (just like during the Roman and Medieval Warming periods) and hopefully we can get the technological boom to get us off of this single planet.
Surely, surely,just look st the Mid-West at present to see proof of that.The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
Yes, I agree. Plant growth will be exceptional. Animal life will flourish and if history repeats itself wars will diminish. Man will enjoy a boom in culture (just like during the Roman and Medieval Warming periods) and hopefully we can get the technological boom to get us off of this single planet.
Surely, surely,just look st the Mid-West at present to see proof of that.The environment problem of global warming is inevitable, we just should take actions to solve it to save ourselves.
Yes, I agree. Plant growth will be exceptional. Animal life will flourish and if history repeats itself wars will diminish. Man will enjoy a boom in culture (just like during the Roman and Medieval Warming periods) and hopefully we can get the technological boom to get us off of this single planet.
i like those German words!I hear your incantations, but thus far have seen nothing but piles of straw that do not shine and smell more like stable than precious metal.
"Heute back ich, morgen brau ich, Übermorgen hol ich mir der Königin ihr Kind; Ach, wie gut, dass niemand weiß, dass ich Rumpelstilzchen heiß)"
Well, they've had 12 years so far. Has the "Movement" died?Wonder how many libs are going to change their minds about science now?
Because I seem to remember libs saying Republicans hate science.
Tree-ring study proves that climate was WARMER in Roman and Medieval times than it is in the modern industrial age | Mail Online