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KR at 01:50 AM on 28 July 2012Mann Fights Back Against Denialist Abuse
I find the focus on Dr. Mann (and his work from 15 years ago such as in recent comments here, as opposed to the dozen or so similar reconstructions using different data, different methods) to be a rather revealing Rorschach test for deniers - he's achieved an iconic status in 'skeptic' circles, and there seems to be some idea that if only the icon can be tarnished, all that inconvenient data will just go away... - which it won't. That entire line of attack simply reveals the paucity of the skeptic arguments. Argument ad hominem rather than discussing the facts, the science. -
dana1981 at 01:42 AM on 28 July 2012Mann Fights Back Against Denialist Abuse
Albatross - I'd say the difference is that McIntyre is attacking the Penn State president and inquiry instead of directly criticizing Mann (though I didn't read his whole post, just the quotes at Deep Climate). He's indirectly inferring that Mann did something wrong instead of directly stating it as CEI and National Review did, and not comparing Mann to Sandusky as CEI did (propagated in the NR article quote). In short, McIntyre is behaving very Watts-like, throwing chum to his denialist readers without actually coming out and making specific accusations. This follows the behavior discussed in the final section of the post above, with denialist blogs frothing up their readers with these sorts of baseless accusations. As long as we're comparing the two investigations, it's worth noting that the Penn State football program brings in $60 million in annual revenue to the college, whereas Mann clearly does not. Thus there is no basis to infer that one coverup is evidence of another, since the underlying motivation of the former does not apply to the latter. To cut straight to the point, as noted in the above post, there is zero evidence that Mann did anything wrong. Even if the Penn State inquiry hadn't been 100% thorough, frankly the inquiry should not have been conducted to begin with. The McIntyres and Wattses of the world need to take their tinfoil hats off and stop with the baseless accusations which lead to abuse and death threats towards honest climate scientists. If you want to dispute the science, then do so, but stop attacking the messengers. -
chriskoz at 01:33 AM on 28 July 2012Mann Fights Back Against Denialist Abuse
caerbannog @11, Thanks for that link to your calculations. Your honnest expectation (or maybe rhetoric sarcasm) is that deniers act logically. Nope. Your case proves again that in their actions, there is no place for any logic. What's the logic in this defamatory nonsense against Mike Mann? What are the motives of this individual called Ryan Simberg and CEI supporting him? I would call it the "final stage of denialism" - an attitude of a man who becomes so obsessed as to be detached from reality. He still has a chance to go back to reality by retraction and appology, otherwise he faces a certain defeat in the court case that would follow. -
dana1981 at 01:32 AM on 28 July 2012Esper Millennial Cooling in Context
Aanthanur - even more shocking, they didn't bring the usual "tree ring proxies are unreliable" meme this time. Climate contrarian skepticism is very selective, which is why they're not actual skeptics. They're only 'skeptical' until they find information to support their pre-determined conclusion. That's not skepticism, that's confirmation bias. -
Albatross at 01:29 AM on 28 July 2012Mann Fights Back Against Denialist Abuse
I wonder where Mr. Steyn derived his inspiration from and what information on the internet piqued his interest as well as his imagination? Well, coincidentally (not) a certain "auditor" has been trying quite hard (see here, for example) to draw parallels between the tragic Sandusky affair and Dr. Mike Mann. Mr. McIntyre is then happy to let those uninterested with facts and the truth let their imaginations run wild. One has to wonder why Dr. Mann's lawyers have not yet sent a similar letter to Mr. McIntyre? Such a letter id long overdue in my opinion. And this OP once again clearly demonstrates why the the Climate Science Legal Defense Fund is (unfortunately) so badly needed. -
Tom Curtis at 01:09 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger @180:"But that has no bearing on the fact Michael Mann appended instrumental temperature data to his reconstructed historical record, smoothed the resulting series then published that (truncated at 1980) as a reconstructed historical series. It also has no bearing on the fact this Skeptical Science article contains a factual error."
You certainly like throwing out falsehoods. MBH 98 contained a reconstruction of temperatures over the last 600 years at annual resolution. The smoothed line was not the reconstruction and has not been claimed to be the reconstruction by Mann or his co-authors. The claim that it is the reconstruction is an invention by fake climate-auditors who, by that invention pretend they are making substantial criticisms when they are quibbling about irrelevancies. Again, I quote Michael Mann:"In some earlier work though (Mann et al, 1999), the boundary condition for the smoothed curve (at 1980) was determined by padding with the mean of the subsequent data (taken from the instrumental record). This does make a small difference near the end of the series. It doesn't effect any of the conclusions drawn in the paper though. These were based on comparisons of the individual reconstructed annual values (individual years and decadal averages over 10 consecutive years) from AD 1000-1980, with those from the recent instrumental record (1981-1998), and centered on the fact that the recent instrumental values were outside the error range of the reconstructed values over the past 1000 years and were not related to the smoothed curve. This figure shows the comparison of the originally published result with an alternative smoothing based on our more recent approach which does not use any instrumental data."
(My emphasis) Again, when will you stop "saying untrue things about simple facts"? -
Tom Curtis at 01:01 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger @180: Detail of fig 5 of MBH 98:
(Red marks added to show 1900 and 1950)
Please note that the smoothed curve terminates around 1973, not 1980. Clearly, therefore, McIntyre's reconstruction of Mann's "third step" is incorrect. You will note, of course, that no matter how carefully we examine McIntyre's code, it will not make the smoothed curve MBH 98 terminate in 1980.
So, here is the question, will you acknowledge that McIntyre's reconstruction of Mann's smoothing method did not in fact successfully reconstruct that method?
Or will you continue to "say untrue things about simple facts"?
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Brandon Shollenberger at 00:48 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Tom Curtis @173, yes, that's correct. And as Steve McIntyre (as well as many others) has pointed out, Phil Jones did not truncate the series as Michael Mann did. This means what he did is not actually the same as what Mann did. But that has no bearing on the fact Michael Mann appended instrumental temperature data to his reconstructed historical record, smoothed the resulting series then published that (truncated at 1980) as a reconstructed historical series. It also has no bearing on the fact this Skeptical Science article contains a factual error.Moderator Response: [DB] Note that a laser-like focus on some minor technical point doesn't alter a paper's conclusions at all. -
DSL at 00:47 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Brandon: "The reality is people like Steve McIntyre have gone to great lengths to explain just what was done, and by who." I believe you've hit upon the problem, Brandon. -
Daniel Bailey at 00:46 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Methinks Brandon is sounding shrill. -
Daniel Bailey at 00:46 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Indeed. We should create a new "Law" rule, aka Godwin's Law: Mann's Law: "As an online discussion about climate science grows longer, the probability of a comparison involving Michael Mann to tricks/fraud/misconduct/secret cabals/world domination is inevitable." Corollary to Mann's Law: "Once such a comparison is made, the thread is finished and whoever mentioned Michael Mann has automatically lost whatever debate was in progress; the coupling of this corollary with the initial statement of the law proves every threaded discussion to be finite in length." -
desertphile at 00:44 AM on 28 July 2012The name is Bond...Gerard Bond.
".... I can tell you with full confidence that is NO credible empirical evidence in the entire historical record that CO2 has had ever any impact on Earth's climate! I am told my many people, with full confidence, that ghosts are real; I am also told by many people, with full confidence, that "fee energy" is possible. Meanwhile, the PPMCC between atmospheric CO2 increase and global average temperature increase is 0.90642 -
caerbannog at 00:44 AM on 28 July 2012Mann Fights Back Against Denialist Abuse
Here's yet another data-point that shows how "skeptics" are far more interested in harassing scientists than doing any real work of their own. Remember how the CRU was inundated with FOI demands related to the raw station data in its possession? Remember this FOI storm? Well, as of today, it's been exactly a year since the CRU released all of the raw data that the "skeptics" had been demanding (and at the risk of violating nondisclosure agreements with supplers). So, what has happened in the year since? Do you hear crickets chirping? With only one exception that I know of (and that exception's results confirmed the CRU's work), not a single "skeptic" has done a lick of work with the data. Listen skeptics -- you've had the CRU's raw data in your hot little hands for a whole year. How about showing us some results? Or at least how about acknowledging that your FOI antics were intended to harass scientists and waste their time, and that you never intended to do any real work with the data? And don't even try to use the "scientists didn't disclose their methods/code, so we couldn't replicate their work" excuse. Don't even think about going there. Because on July 30 of last year (3 days after the CRU released all that data), I downloaded the CRU raw data, crunched it, and posted my results right here. Total turn-around time? A few hours. In that July 30 post, I made this bold prediction: Now, it remains to be seen what (if anything) the deniers who have been demanding access to this complete data-set will actually do with it. Based on what I've seen of their past performance (or lack thereof), I'd be willing to wager that they will produce absolutely nothing meaningful. Am I psychic or what? -
Brandon Shollenberger at 00:43 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Tom Curtis @169, there is no contradiction in saying results generated by a particular methodology are different than the results generated by the same methodology applied to a different data series. @171, McIntyre shows what was done in Mann's work that appeared in Nature. The e-mail in question is discussing a figure with three lines. One is Mann's work being referred to in my discussion. Another is from Keith Briff's work. Phil Jones says, "I’ve just completed Mike’s Nature trick of adding in the real temps to each series for the last 20 years (ie from 1981 onwards) amd from 1961 for Keith’s to hide the decline." It is obvious what work he is referring to. Phil Jones referred to a trick in Michael Mann's work "of adding in the real temps to each series for the last 20 years." Steve McIntyre discusses Mann having appended 18 years of instrumental temperature data to his reconstructed temperatures. "Mike's Nature trick" is exactly what Steve McIntyre says it is. -
Albatross at 00:41 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Sphaerica @174 and Alex @172, Hear, hear! What this nonsense essentially amounts to is people like McIntyre being obsessed by a paper from almost 15 years ago, engaging in an orchestrated and mendacious vendetta against climate scientists and using any opportunity (real or imagined) to shout "Squirrel!". In the meantime, while we fiddle Rome burns... -
desertphile at 00:39 AM on 28 July 2012The name is Bond...Gerard Bond.
A very fine article: thank you. Bond Events don't look cyclical, judging from _Bond_et_al_ (1997) but it is possible they are, or were: one needs a much longer series of data to answer the question. It seems very odd to me that denialists and professional liars insist that proxy data going back 600 years are all wrong when Dr. Mann _et_al_ published the data, but proxy data going back 10,000 years are Gospel if they give the verisimilitude of causing doubt on the evidence for human-caused climate change. -
Aanthanur at 00:37 AM on 28 July 2012Esper Millennial Cooling in Context
what i find interesting is that while several deniers seem to accept this Esper paper, they didn't bring the usual, but they used Computer Models meme this time :D -
Bob Lacatena at 00:35 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
I get so tired of deniers trying to knit pick Mann (a very, very small part of the climate puzzle) to death, while: 1) No one has ever succeeded in demonstrating that the MCA was warmer than current temps, and if it is then that's bad, not good, news for the future climate. 2) Multiple studies, done in a variety of ways, have reinforced Mann's original conclusions. 3) The number of hockey sticks we see in the world -- from temps to sea ice to extreme events -- is increased every day. Really, this is getting tiring. Deniers need to stop focusing on Mann and either put up or shut up, as far as "proving" their point. The complete failure of the denial movement to generate any actual, factual arguments sort of makes this nonsense about Mann crystal clear -- it's a distraction from reality, because it's the only place where deniers think they can remotely "win", and then only because no one really cares (except for Steve "The Auditor" McIntyre)! -
Tom Curtis at 00:28 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger, to establish one simple fact, you claim that:"The trick actually consists of splicing instrumental data onto the reconstructed series (starting at 1980), smoothing the resulting series, then truncating the series at the point the instrumental data had been appended."
(My emphasis) As, according to you and McIntyre the instrumental data was appended from 1980 onwards, this would mean that the smoothed series terminates in 1980. Is that correct? -
Alex C at 00:23 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
@Brandon Shollenberger #167: >>>To put it simply, code has been provided which allows one to exactly replicate the results stated by Steve McIntyre. But if McIntyre did not accurately describe what Mann did then the code he provided to allow others to replicate his results will only cause others to replicate his inaccurately applied description. Tom's point was that Mann used the mean of the instrumental data to pad, not the instrumental data itself. I again propose you're making a mountain out of a molehill. The paper's conclusions would stand with or without the filter and as such the different padding choices would have (a) a marginal effect on the endpoints and (b) no impact on the paper's conclusions. I would contend that choosing zeros for a padding method at the end is the wrong thing to do, too. The tree ring data was calibrated to reflect temperatures of the northern hemisphere, so the better thing to do would be to use actual NH data, if it existed (which it just so happened to). -
Tom Curtis at 00:21 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger @167, code for a purported reconstruction of a smoothing technique is not evidence that that smoothing technique was "Mann's Nature trick". Before the reconstruction of the smoothing technique can be evidence of what is involved in the "Nature trick", you must first establish that the smoothing technique used in MBH 98 was the trick that either Jones referred to or that Mann understood Jones to be referring to. McIntyre provides exactly zero evidence on this point. He merely asserts it. I do not expect you to appreciate this point as your ability to condemn depends on your not understanding it. But so much, therefore, for your commitment to truth. -
Albatross at 00:19 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Hi Tom, Brandon is merely recycling longed debunked claims made by the self-styled "auditor". DeepClimate has long ago addressed McIntyre's efforts to mislead readers of a UK newspaper and do what he likes to do, make mountains out of molehills, and then suggest misconduct by certain climate scientists (oddly, almost never "skeptics") . In fact, McIntyre's missive and distortion of the facts was so bad that DeepClimate had to split up his rebuttal into two parts. The second one can be found here. DeepClimate concludes [my highlights]: "Judging from his recent presentation at the Heartland Institute sponsored International Climate Conference, it appears that Steve McIntyre has not changed his narrative and interpretation of the "climategate" emails of September 1999. Neither is there any indication, as far as I know, that McIntyre has responded to the facts presented above. Based on currently available information, then, McIntyre appears to have chosen option (b) and has ignored the evidence, at least so far." Now had Mann posted such an article as McIntyre's in a newspaper, I'm sure allegations of "fr@ud" would be rampant by the usual suspects who specialize in promulgating misinformation, feeding fodder to the skeptics and attacking climate scientists. It is sad that some are so willing to (knowingly?) defend the mendacious actions and flawed arguments of people like Mr. McIntyre. -
Tom Curtis at 00:15 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger @168, I was merely pointing out that your claim as written contradicts itself. If you cannot recognize the contradiction, that is not my problem. -
KR at 00:03 AM on 28 July 2012It's the sun
curiousd - A more simple argument against increased solar flux is that solar flux has decreased since 1980, as seen here, going in the opposite direction from the temperature trend. But yes, stratospheric cooling is one of the fingerprints of GHG warming - less energy going from the troposphere to the stratosphere due to GHG entrapment, while higher concentrations of GHG's in the stratosphere cause some radiative cooling to space. There are complications in terms of stratospheric water vapor trends, but that's the basic mechanism. -
Brandon Shollenberger at 00:00 AM on 28 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Tom Curtis @166, if you have a question about what I said, I'd be happy to clarify. However, if all you want to do is mock a comment because you think it is wrong, I don't see anything worthwhile coming from it. -
Brandon Shollenberger at 23:59 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Tom Curtis, you claim I haven't provided "substantial evidence" for my description of the trick. The link I provided contains links to exactly that. In fact, one link provides code to exactly replicate what was done. Given that, your points 1-3 are without merit. As for your point 4, you claim "fake climate-auditors" use the term "Mike's Nature trick" to give a false impression. The reality is people like Steve McIntyre have gone to great lengths to explain just what was done, and by who. Your accusation here is without basis, just like the rest of your disagreement has been As for your point 5, it's hard to tell exactly what you're showing when you provide nothing but an image with no legend, caption or source. Since the image you provide is different than images provided with the code needed to replicate them, one could safely dismiss it as is. There is simply no way to know what was actually done in it. To put it simply, code has been provided which allows one to exactly replicate the results stated by Steve McIntyre. Nobody has shown any mistake in that code. Dismissing the results without showing any flaw in them is inappropriate. -
Tom Curtis at 23:49 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Shollenberger @165:"You can debate whether or not Mann's approach was right. You can say he should have done something else. I won't disagree. However, the point here is given the methodology Mann used, his figure should have been notably different. The only reason it isn't is he spliced instrumental data onto his reconstructed series."
So, given that Mann used a particular method it should have looked one way, but it looks different because he didn't use the method that he used. Got it! -
Brandon Shollenberger at 23:43 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Alex C, you can see the effect of the decision in the link I provided. The visual impact is undeniable. If one uses the method Mann used (including his Butterworth filter) without appending the instrumental series to the reconstructed series, the series ends on a downturn. That's the opposite of what the instrumental series shows. It's obviously something readers should be informed about. As for the data not dropping to zero, you are right. You can find an explanation via the link I provided, but the simple version is when one smooths a series, the ends of the series can't be treated the same as the middle. You just don't have any data on the edges to use for averaging. To address that problem, sometimes "padding" is used. This is a process where data is artificially generated to be used in the smoothing function. There are a number of ways of doing it, but in Mann's case, he padded the series with zeroes (the mean of the instrumental record during the calibration period). By padding the end with zeroes, he forces the data to trend to zero. You can debate whether or not Mann's approach was right. You can say he should have done something else. I won't disagree. However, the point here is given the methodology Mann used, his figure should have been notably different. The only reason it isn't is he spliced instrumental data onto his reconstructed series. And that is "Mike's Nature trick." It is not merely plotting two series together as this article claims. -
KR at 23:42 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
As a side note, due in large part to the changes in funding laws in the US (Citizens United case, US Supreme Court), Koch Industries alone has put more money into the 2012 presidential race than the total of McCain's 2008 campaign expenditures (from NPR). There's a lot of money being applied to denying science, and the attacks on Mann and others are just one part of it. -
BWTrainer at 23:31 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
It's amusing how the skeptics continue to try to bring down the hockey stick as if the entire body of knowledge on global warming rests on a single study done in the 90s. -
Tom Curtis at 23:18 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Brandon Shollenberger @159 and @161, given the nature of your concluding comments, it would be helpful if you were careful with the facts. Let's actually start with those facts: 1) The only person who knows what was meant by Jones when he wrote of "Mann's Nature trick" was Jones himself. Comments by any other person, including most especially Steve McIntyre consist of conjecture only. 2) The person next best placed to know what was meant was Michael Mann himself, who has said:"The paper in question is the Mann, Bradley and Hughes (1998) Nature paper on the original multiproxy temperature reconstruction, and the ‘trick’ is just to plot the instrumental records along with reconstruction so that the context of the recent warming is clear."
I am unaware of any specific statement by Phil Jones on the issue. Consequently this statement is the only available statement by a principle and should be taken as definitive unless substantial evidence to the contrary exists. Neither you, nor so far as I am aware, anyone else has provided that substantial evidence. Rather, you have insisted that McIntyre's conjecture should trump Mann's word on, apparently little other basis than the desire that Mann should be wrong. 3) Mann did use a technique similar to that described by you in generating the smoothed curve for MBH 98 and MBH 99. Specifically, he appended the mean of the instrumental data from 1981-1997 (MBH 98) and from 1981-1998 (MBH 1999) and use that to pad the proxy data for generating the smoothed curve. Note that contrary to McIntyre, he did not use the instrumental values themselves, but the mean of the values over a given period. Further, and again contrary to McIntyre, he ended the smooth in 1973 (MBH 98) and 1979 (MBH 99), ie, the period determined by necessity when using a 50 year (MBH 98) or 40 year (MBH 99) smooth. Clearly McIntyre has not even got the reconstruction of Mann's smoothing method correct. His supposition that he can deduce from his flawed reconstruction of Mann's smoothing method the nature of the "Nature trick" is absurd. Specifically, McIntyre gives no evidence that the trick relates to the smoothing function as opposed to appending of the full instrumental record as claimed by Mann. 4) Assuming Jones was referring to his graph for the WMO report, he did not do anything like what Mann did in his Nature article (MBH 98). Consequently the name of "Mike's Nature trick" is a complete misnomer. Fake climate-auditors, however, insist on using it, and in trying to suggest that Mann did something similar. Clearly the purpose is not to criticize Jones' techniques, which stand or fall on their own merits. Rather it is an attempt to try and tarnish as many reputations as possible on no substantive basis. 5) As always, the holy grail for so-called climate auditors is to detract from Michael Mann's work. In this case, the absurdity of their attack is shown by the fact that: a) As Michael Mann says:"[The scientific results] were based on comparisons of the individual reconstructed annual values (individual years and decadal averages over 10 consecutive years) from AD 1000-1980, with those from the recent instrumental record (1981-1998), and centered on the fact that the recent instrumental values were outside the error range of the reconstructed values over the past 1000 years and were not related to the smoothed curve."
and b) The smoothing technique used by Mann in MBH 98 and MBH 99 do not significantly effect the visual appearance. (Original text snipped to correct error) Original smooth shown in blue, amended technique shown in green. :
Shollenberger says he wants people to stop saying untrue things about simple facts. We will be able to determine the strength of his desire by whether he in fact stops doing just that.
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Alex C at 22:45 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
@Brandon Shollenberger #161: Since the NH land instrumental series spans a temperature range of >1˚C, would the effect really be any different than merely plotting the tree ring chronology against the instrumental period with an overlap along the calibration period? I wonder if you're making much ado about nothing. I also don't know much about the Butterworth filter, but how much of the effect seen at the end of the series from the non-smoothed-with-instrumental data, in other words how much of that downward angle, is due to the choice of filter itself and how it behaves at the endpoints of series? Certainly Mann didn't splice instrumental data at the beginning of the time series, but the filter that McIntyre applied certainly seems to drop below what Mann's data shows. The tree ring data also doesn't show such a drop to the zero mark at the very end so the filter's doing something at the endpoint that reflects the trend of the data preceding, but doesn't respond to higher frequencies as might have actually existed at, say, ~1970-1980. Indeed from a brief lookup e.g. here: http://ocw.mit.edu/resources/res-6-007-signals-and-systems-spring-2011/lecture-notes/MITRES_6_007S11_lec24.pdf Butterworth filters are low-pass and will suppress higher frequencies. So the ends of the smooth won't necessarily behave as the trend might actually be in the later data.Moderator Response: [DB] Fixed text per request. -
sime at 22:44 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
"We call on all climate 'skeptic' blogs to condemn the defamatory language from CEI and National Review, and the abuse directed towards climate scientists in general..." The correct, honest and noble path, something most decent, honest individuals with any level of self-respect for them selves and others would do without question. Don't hold your breath waiting for "climate 'skeptic' blogs to condemn the defamatory language from CEI and National Review" you will simply go blue and look like a Smurf. The silence of these so called "climate 'skeptic' blogs" and their outright refusal to condemn actions of this type speaks volumes as to their integrity (or lack there of) and to the sort of individuals who frequent these blogs and perpetuate this kind of nonsense. Simply put hell will freeze over (and Greenland will melt) before these blogs and associated individuals who frequent them will give any kind of condemnation or apology or admit they were then and are now totally and utterly wrong. -
curiousd at 22:40 PM on 27 July 2012Greenhouse gases are responsible for warming, not the sun
Just to hone a terse anti denialist argument for students, since the fingerprint of increased solar incident flux causing warming is warming throughout the atmosphere and the fingerprint for increased GHG warming is cooling in the stratosphere whilst warming on the surface, does this alone not shoot down the whole "The present is a reprise of the Med Warm period?" skeptic argument? -
Brandon Shollenberger at 22:07 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
CBDunkerson, your response is wrong. In no way does modifying the reconstructed data by using data from another series qualify as "plotting recent instrumental data along with the reconstructed data." How could modifying a series possibly be just plotting it along with another series? There are two sets of data plotted in the graph. One is the instrumental series. The other is the reconstructed series modified by using the instrumental series. This is not as you describe, and it's effect can readily be seen in the link I provided. Moreover, you make an untrue remark about Michael Mann. You say, "Mann excluded provably erroneous proxy data in favor of showing the actual global temperature measurement results." You're claim that Mann "excluded" data is untrue in this context. The reconstructed series he had ended at 1980, as did his final result. While data in that series was modified, none was excluded. I assume you are just mixing up this case and a case involving Keith Briffa, but whatever the cause, your claim is wrong. As for the rest of what you say, I don't have any intention of discussing the significance (or lack thereof) of these points. I'd just like for people to stop saying untrue things about simple facts. -
Dikran Marsupial at 22:05 PM on 27 July 2012Christy Exaggerates the Model-Data Discrepancy
@angusmac the error bars do not mean the same thing on the two graphs though, hence you are not comparing apples with applies. The error bars on the AR4 diagram are the uncertainty in the forced trend, the error bars on the RC diagram represent the uncertainty in the observations, which includes both the forced and unforced trends. Note that on AR4 Figure TS.26 the observations lie well outside the error bars from the outset (1990), which should be a hint that the error bars plotted in that figure are not an indication of where we should expect the observations to lie. At least seven of the data points plotted on that figure lie outside the error bars. Do you really think the IPCC would pulish a figure that (according to your interpretation) falsifies the pojection, without mentioning it? -
curiousd at 21:55 PM on 27 July 2012It's the sun
Is the following simple argument valid against increased solar flux causing the temperature increases since 1980? (This argument may be elsewhere here, but I have not seen it.) 1. If it were only increased solar flux causing the temperature increase, then the stratospheric temperature deviation would not show stratospheric cooling since 1980. 2. But systematic stratospheric cooling has occurred since 1980. Therefore the temperaature increase at the earth's surface must be due to decreased IR power radiated into the atmosphere. -
CBDunkerson at 21:53 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Brandon, you're describing a difference without a distinction. That is, the process you lay out can be accurately described as "plotting recent instrumental temperature data along with historical reconstructed data"... the statement you are ostensibly 'refuting'. You're just specifying minutiae of how the two data sets were plotted together. Does this focus on minutiae change the conclusion that Muller misrepresented the 'trick' as hiding a decline in global temperature data? No... because the whole point of the trick was to show the global temperature data! There isn't any decline in that data. The decline is a known error in the proxy data from tree rings. Mann excluded provably erroneous proxy data in favor of showing the actual global temperature measurement results. The 'skeptic' claim that failing to show false results is some kind of scientific misconduct demonstrates just how divorced from reality they have become. -
angusmac at 21:53 PM on 27 July 2012Christy Exaggerates the Model-Data Discrepancy
Moderator @33 Both the RC Figure 2 and my version of AR4 Figure of TS.26 refer to global temperatures. Therefore, I am comparing apples with apples. The NH figure to which you refer (AR4 Figure 6 in angusmac @ 28) was clearly a reference to the shading of the diagram; I did not compare RC global temperatures with AR4 NH temperatures.Moderator Response:[DB] "Both the RC Figure 2 and my version of AR4 Figure of TS.26 refer to global temperatures."
Still wrong. Your graphic at 28 above is clearly labeled as AR4 Figure 6.10c (IPCC, 2007). Explanatory text of that graphic:
Figure 6.10. Records of NH temperature variation during the last 1.3 kyr.
You would be better served by admitting that you misunderstood the applicability of the graphic you referenced and also (un)intentionally misrepresented how you presented it. Since you persist in your error the only conclusion one can draw is that the error is willful; the intent, to dissemble and mislead.
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ProfMandia at 21:44 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
At the upcoming AGU conference in San Francisco, Climate Science Legal Defense Fund has convened a formal session along with several workshops in order to educate scientists about their legal rights. When the schedules are set I will let you know. In the meantime one can view the formal session abstract and I hope that you all spread the word so that we can increase the number of submitted abstractss and also make people aware of this valuable program at AGU. -
Brandon Shollenberger at 21:33 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
In following the instructions given in the moderator's response to my #1, I've posted a comment here which discusses a factual error in that appears in this (and that) post. Interested readers should follow the link. -
HS at 21:31 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
I do think it is high time that this practice of wanton accusations of dishonesty - of scientific dishonesty, i.e. of a kind that matters - is challenged and challenged hard. (-Snip-)? And will we also see, ( -Snip-)?Moderator Response: [DB] Off-topic & sloganeering snipped. And I'm quite capable of repeating this action as needed. 24/7/365. -
Brandon Shollenberger at 21:30 PM on 27 July 2012Muller Misinformation #1: confusing Mike's trick with hide the decline
Your description of “Mike’s Nature trick” is false. The trick is not merely “plotting recent instrumental temperature data along with historical reconstructed data.” If it were, there’d be no problem. The trick actually consists of splicing instrumental data onto the reconstructed series (starting at 1980), smoothing the resulting series, then truncating the series at the point the instrumental data had been appended. That is nothing like what you describe. For more information on the subject of “tricks,” I highly recommend readers look at this post. -
Daniel Bailey at 21:29 PM on 27 July 2012Hurricanes aren't linked to global warming
Phil, since David is either being purposefully obtuse or simply unclear, I clarified my assessment with "if". Hence, if the root argument he makes is based on a misunderstanding of the greenhouse effect, the comments could then stay here or go to one of the more applicable GHE threads. If it is based on a misunderstanding of the applicability of the 2nd Law, then it should go as directed. Either way, my comment holds. -
Esop at 21:18 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
#3 (newscrusader): This is absolutely true. The extreme weather events in the US have done massive damage to the denialist cause. They lucked out with the cold winters of 2010 and 2011 and got massive public support, as well as support from the MSN (still the case in Northern Europe due to a few weeks of cold temps in the past winter as well as a cool and rainy summer). Now, however, it has all turned against the US based deniers. Public support is dropping like a rock and a major fraction of the MSN is all of a sudden very science friendly. CNN even stopped calling them skeptics, and started calling them by their real name. This has had a predictable effect: Desperation. It shows. -
Sceptical Wombat at 21:10 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
I wish Mann luck but as I understand it if he counts as a "Public Figure" then the bar for proving libel in the US is rather high. He will need to prove that CEI and Nation Review knew that what they were saying was false. -
sauerj at 20:58 PM on 27 July 2012Tar Sands Oil - An Environmental Disaster
Andy S: I'm sorry, but I hastily skipped over your note above (my bad!). Reading both of your comments, clears things up for me. ... Even if the ultimate Tar Sands extraction was 50% or even 25% of 240 giga tons (per your comment above), this potential of 60 gigatons (vs the article's 1 gigaton) is alarming and should be, in my opinion, the reported number. The public needs to know what Tar Sands can ultimately do, not just what will be routed down the KXL. ... Thank you for clearing this up; this is a very important distinction. -
Dikran Marsupial at 20:53 PM on 27 July 2012Hurricanes aren't linked to global warming
David Friedman Looking up perpetual motion machine of the second kind gives "2. Also called perpetual motion of the second kind motion of a hypothetical mechanism that derives its energy from a source at a lower temperature. It is impossible in practice because of the second law of thermodynamics. I'm pretty sure that the energy source (the sun) is at a higher temperature than the Earth. ;o) According to Wikipedia, "A perpetual motion machine of the second kind is a machine which spontaneously converts thermal energy into mechanical work. ..." Well I have a Crookes' radiometer in my workshop, which does just that, so there must be more to it than that. When the thermal energy is equivalent to the work done, this does not violate the law of conservation of energy. However it does violate the more subtle second law of thermodynamics (see also entropy). The signature of a perpetual motion machine of the second kind is that there is only one heat reservoir involved, which is being spontaneously cooled without involving a transfer of heat to a cooler reservoir. This conversion of heat into useful work, without any side effect, is impossible, according to the second law of thermodynamics. As Tom points out, storms are formed by updrafts over warm water that take warm moist air up higer into the atmosphere, which is cooler. Thus there is no contravention of the second law of thermodynamics, as far as I can see. Your PhD in physics means very littlle. I have a PhD as well, and I am an active researcher in my own field (essentially statistics), and have a h-index over 20. Does that mean that my arguments on statistics have any greater strength than if they came from somebody else? No not really. There is also the point that the authors of the papers on which this article is based also have PhDs, and more importantlty are also experts on this particular topic. You would be better off explaining your scientific objection in more detail in a more moderate manner, the postuting does you no favours at all, it just isn't the way science should be done. -
Phil at 19:39 PM on 27 July 2012Climate Change Cluedo: Anthropogenic CO2
As Tom points out, the divergence into Atmospheric Ozone chemistry is irrelevant and bordering on being off-topic, so I'll try to be brief. I think Chris Machens is confused between free Oxygen radicals and an Oxygen molecule. As Bob points out above, The decomposition of O3 results in the creation of O2 molecule and an O* (free radical). These free radicals are extremely unstable and immediately engage in various other reactive pathways, illustrated in the Chapman Chemistry document. Some of these pathways result in further creation of O2 molecules and some of which "trap" oxygen in Nitrous Oxide. So there are three problems with the statement "Ozone depletion also depletes Oxygen molecules", 1. It assumes one of these pathways is favoured over the other, for which no evidence is presented 2. It assumes that the "trapping" of oxygen in Nitrous Oxide is permanent; i.e. the oxygen is not recovered at some later stage. We know NO2 levels in the atmosphere are pretty constant, I would suspect that ocean chemistry (via acidic rain) would be important in this regard 3. Since we know that Ozone creation depletes O2 then the assertion that Ozone destruction does too should raise the question "How come we're still breathing?" :-) -
newcrusader at 19:31 PM on 27 July 2012Mann Fights Back Against Denialist Abuse
Dr. Mann is fighting back against the many ultra conservative organizations and corporations in the USA. This mainly involves the Koch industries & the varied fossil fuel interests. With the Public now beginning to see the link between greenhouse gases and extreme weather (specially after the hellish summer in the US Heartland) The Denial stormtroopers are become excitingly worried. And their first line of attack is against Mann.
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