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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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Comments 68301 to 68350:

  1. Galactic cosmic rays: Backing the wrong horse
    Eric#66: "the air is drier during glacial periods" And yet it must have rained: Lake Bonneville was a large, ancient lake that existed from about 32 to 14 thousand years ago. ... At its largest, Lake Bonneville was about 325 miles long, 135 miles wide, and had a maximum depth of over 1,000 feet. ... Its relatively fresh water was derived from direct precipitation, rivers, streams, and water from melting glaciers. During the time of Lake Bonneville, the climate was somewhat wetter and colder than now. -- source
  2. Infrared Iris Never Bloomed
    We've been warming at close to the estimated rate, and the climate warmed during past epochs. The Iris Effect would have to have taken the equivalent of a "union 10" for current warming and been AWOL for past warming. Nature isn't an in and out runner. It runs to form every time.
  3. Galactic cosmic rays: Backing the wrong horse
    skywatcher, if what I say is purely speculation I will try to caveat appropriately it (e.g. "I don't have evidence in front of me, but I think...") Irregardless I should have supported #60 a little more. Dust is an important feedback in glacial periods although not well understood and quantified (e.g. http://www.sciencedirect.com/science/article/pii/S0277379111002861 and (for Muoncounter) the air is drier during glacial periods http://earth.geology.yale.edu/~wb98/papers/Boos2011_LGMthermoscaling_090711.pdf although with latitudinal variation. Ice sheet build up does not require more precip, just precip over the ice sheet. The dust is the result of the predominately drier climate. The dust makes cosmic rays somewhat moot. Skywatcher, yes, my solar flare idea is somewhat spurious, only supported by the increased probability due to lack of a protective magnetic field. But it is not a valid reason as to why the explain the Laschamp anomaly did not produce a climate change, I should not have brought it up. The lack of climate change rests sufficiently on the fact that the glacial climate is dry. How would more clouds form in a dry atmosphere (and stable tropical atmosphere, see Boos paper)?
  4. Plimer vs Plimer: a one man contradiction
    I find it very sad that Plimer, who made his public name with a stinging rebutal of creationism now is using creationist tactics as a play book. His strategy is, you don't need to convince the scientists if you can convince the public. And now, apparently, you don't need to convince adults if you can convince children. The less educated, the less well informed people are on the topic, the more Plimer wants to talk to them. The obvious reason is, the well educated and truly well informed will not be taken in by his brand of snake oil.
  5. Plimer vs Plimer: a one man contradiction
    @28 I've tracked down the contents of Plimer's latest contribution to education: Table of Contents FOREWORD PREAMBLE FOR PUPILS, PARENTS AND PUNTERS INTRODUCTION 1. HUMAN-INDUCED CLIMATE CHANGE: WHY I AM SCEPTICAL A short history of planet Earth What warming? Follow the money Corruption, fraud and porky pies Snow, ice, floods and cyclones Fellow travellers 2. SCIENCE The process of science Evolution of scientific ideas Models, predictions and adaptation Anti science 3. CARBON DIOXIDE, WATER AND ICE Planetary degassing and carbon dioxide An innocent trace gas Another innocent trace gas Water and ice Sea level 4. TEMPERATURE How do we measure global temperature? Urban effect Adjusting of measurements Hottest year on record 5. HOW TO GET EXPELLED FROM SCHOOL Background Is climate change normal? One hundred and one questions. A guide for teachers, parents and punters REFERENCE I bet we could write this book by picking the relevant sections from the climate myths on this site and inserting them. I hope that the educators in Australia take umbrage at both Plimer's and John Howard's insulting excursions into the creationist's model of teaching science. Needless to say Jo Nova is giving P.limer's book a plug (Maybe SkS needs a section on the rogues gallery on Plimer called say "The Plimer Primer")
  6. Galactic cosmic rays: Backing the wrong horse
    Another stake in the heart of the GCR-climate connection: Love et al 2011 Are secular correlations between sunspots, geomagnetic activity, and global temperature significant? We examine the statistical significance of cross-correlations between sunspot number, geomagnetic activity, and global surface temperature for the years 1868–2008, solar cycles 11–23. ... Treated data show an expected statistically-significant correlation between sunspot number and geomagnetic activity, ... , but correlations between global temperature and sunspot number (geomagnetic activity) are not significant. In other words, straightforward analysis does not support widely-cited suggestions that these data record a prominent role for solar-terrestrial interaction in global climate change. That statistical significance thing is a bother, no?
  7. (Fahrenheit) 451 ppm
    Sphaerica, I also hope we do not see 450ppm in 2042. And I agree with your critique of my analysis of emissions surpassing 2ppm a year on average in years to come. I would be nice if they stayed at 2ppm, but that seems unlikely considering the amount of carbon being dumped in the atmosphere. I agree also that by the late 2020's our climate will have deteriorated so much with increasing violent events, droughts, fires and increasing human suffering- that these nations will be forced into doing something to reverse the hellish path we are on. I hope C02 will peak at 650ppm, and begin a slow decline- but even that figure is going to cause our society to change dramatically. The biggest question mark is at what level C02 does all that permafrost begin to release methane.
  8. Global carbon emissions reach record 10 billion tonnes - threatening two degree target
    Hasn't the Durban agreement at COP 17 not only gone past the 2 degree target but at best will mean 3 degrees or above? http://lazarus-on.blogspot.com/2011/12/life-after-durban.html
  9. Plimer vs Plimer: a one man contradiction
    I see the good prof is writing books for kiddies now: ABC: Howard launches 'anti-warmist manual' for kids Anyone working on a collection of answers to his 101 questions?
  10. Plimer vs Plimer: a one man contradiction
    Re #24, 25, 26. Thanks Ross and Philippe, on re-reading the passage, you're both correct and I retract my accusation. It looks like I've been doing some cherry picking myself!
  11. The Monckton Maneuver
    SirNubwub @ 32... You should probably double check with Peter Hadfield if you believe Monckton has been unfairly taken out of context. Hadfield is a very highly regarded science journalist with 25 years experience. I'm sure he would take such a statement extremely seriously and would be able to explain to you (and likely fully document) the claims in his video.
  12. Infrared Iris Never Bloomed
    skept - no warming in the tropics would assume that the iris effect offsets all of the local warming. It would depend on the magnitude of the effect; it might only dampen the tropical warming, for example. Agnostic - I don't know much about clouds, but I believe the type which tend to reside at higher altitudes tend to have more of a warming effect. In other words, it's not that they're at high altitudes that makes them less reflective, but merely that the type of clouds which exist at high altitudes also happen to be less reflective. The figure is just a simplification illustrating that general correlation. But maybe somebody who knows about clouds can speak more intelligently about this.
  13. The Monckton Maneuver
    SirNubWub @32: The offending passage from the original reads (my underlining):
    "He says there has been no correlation between CO2 and temperatures over the past 500 million years – YES, THERE IS. There has indeed been a remarkable correlation between CO2 and temperatures over the past 500 million years – but repeated reanalyses of the data have shown that it was temperatures that changed first and CO2 concentration change that followed. Though it is possible that the additional CO2 concentration reinforced the original warming in each of the past four interglacial warm periods (all of which were warmer than the present), it plainly did not trigger the warming, because the warming occurred first."
    About this, three points should be noted: 1) The claim that Monckton is rebutting is the claim that he said there was no correlation between CO2 and temperature over the last 500 million years. And indeed, he has made that claim as can be seen by watching further into the video. So if Monckton intended to refer only to the last 500,000 years he is shifting the ground of the discussion from an are in which he has been clearly refuted. That is typical of Monckton, and also typical of Monckton, once before a new audience in which he is not being challenged, he shifts back to the original claim. Alternatively, Monckton really does think the record of the last few glacials (500,000 years) is the record of the entire phanerozoic (500,000,000 years). But in that case he is plainly delusional. 2) Peter Hadfield at no point in discussing this point in discussing this issue mentions anything except correlation. He asserted that Monckton denied a correlation between CO2 and temperature (which is true), and that now he asserts there is a correlation (which is also true). He did not assert anything about the causes of that correlation, and in particular, he did not assert anything about Monckton's claimed reasons for the correlation in this section of the video. So, in this situation, Hadfield has not taken Monckton out of context. Rather, it is you who have taken claims out of context by implying that Hadfield has made a claim about Monckton's explanation of the correlation. 3) Further, you yourself have truncated the response. Monckton, as indicated above goes on to say that CO2 may well have a warming effect. The only thing he is not prepared to admit is that CO2 triggered the warming, which no climate scientist asserts.
  14. Infrared Iris Never Bloomed
    Good article. Dana #3, that is one question I would really like to hear an answer to from so-called skeptics, and one that should be raised every single time skeptics claim that climate sensitivity is low.
  15. Infrared Iris Never Bloomed
    The illustrated example of difference in low and high cloud feedback is interesting but unexplained. Why should higher cloud have lower albedo and higher radiative forcing than lower cloud? Is there evidence that this is so? As SST rises would the presence of low cloud be expected to increase over time and increase more rapidly than high cloud? Does low cloud reflect more sunlight or is this perceived to be the case because on average low cloud is more abundant than high cloud?
  16. Infrared Iris Never Bloomed
    Very interesting. One point is unclear in my understanding: the hypothetical "Iris" feedback seems to be nearly instantaneous as it is derived from clouds (relaxation time of the atmosphere is fast, nucleation's change follows change in water vapour concentration) and so, it should be observed at each warming phase (forced or by natural oscillation) in the tropical oceanic basins. No reason to wait for years or decades before the Iris "opens" and "closes". But if it is the case, there would no warming signal at all in the Tropics, just short term variations around a zero trend, with negative feedbacks compensating near immediately the warming. Should we consider the very basic fact that there is a multidecadal warming trend in the Tropics (and elsewhere of course) as a contradiction of Iris hypothesis?
  17. (Fahrenheit) 451 ppm
    " The problem is not to say ‘it is not bad’ – just to observe that the ‘it could be worse than all you imagine’ strategy is pragmatically unfruitful for the last 10 years .... Again, the best is the enemy of the good and I tend to think the more radical postures are just the expression of impotence. " Not quite. This is the expression of an unsuccessful communicator bewailing the failure of earlier communications. The correct communication strategy is unfortunately not well-suited to the sound-bite era. The right message is 'We can get ourselves out of trouble so long as we get started on it right away.' Unfortunately, apart from this message being a bit hard to get across, it's being shouted down by other messages. Think of getting a lazy teenager to clean up their room. Yes, you will get smells and mould, and moths, and cockroaches, and mice, maybe even rats into this house if you don't clean up your food waste and your dirty clothes. See! Your favourite sneakers are ruined by mould and moisture! And as you get more and more frustrated, the teenager in question doesn't even notice because of the headphones blaring and blocking any message you might want to get across.
  18. 2011: World’s 10th warmest year, warmest year with La Niña event, lowest Arctic sea ice volume
    Jeff Masters posted this colorful image in his 12 December blog: -- source The fraction of the country covered by extremely wet conditions (top 10% historically) was 32% during the period January through November, ranking as the 2nd highest such coverage in the past 100 years. ... The fraction of the country covered by extremely dry conditions (top 10% historically) was 22% during the period January through November, ranking as the 8th highest in the past 100 years. The combined fraction of the country experiencing either severe drought or extremely wet conditions was 56% averaged over the January - November period--the highest in a century of record keeping. The wet get wetter, the dry get drier - all at the same time.
  19. Infrared Iris Never Bloomed
    We've often remarked that arguments for low climate sensitivity (and climate stability in general) seem to conflict with the planet's many large climate shifts in the past (i.e. see our discussion with Pielke here and here). We have yet to receive any sort of explanation as to how these two arguments gel. Frankly, paleoclimatology is a bit of a thorn in the side of the low sensitivity crowd, which they seem to prefer to ignore.
  20. (Fahrenheit) 451 ppm
    En francais, "sourd" = "deaf". (Sorry about the circumflex). I do have the sense that you two are on the same wavelength, but not hearing what the other guy is saying. On a besoin d'un appareil auditif? This is a really good discussion. Keep it up, both of you.
  21. The Monckton Maneuver
    Everyone: Thank you for your replies. Sorry to make the thread go in a direction away from the topic at hand. I will address the issue of trustworthiness in another thread at another time.
  22. Infrared Iris Never Bloomed
    DrTsk "What evidence is there that the phase space of the climate system has "very" stable points that pertubations out of those points will dissipate and the system will relax to the same point?" I'd say that the short answer is "none". On the contrary, we may anticipate that the system has instabilities, only we don't know where.
  23. Galactic cosmic rays: Backing the wrong horse
    Eric#6: "there would be much drier air for less cloud formation;" Glacial stages cannot be dry - accumulated precipitation (albeit frozen) is a requirement for firn/glacial ice advance. In addition, much of the globe wasn't ice-covered. I don't think your 'we won't see GCR evidence during glacial stages' idea has much support.
  24. (Fahrenheit) 451 ppm
    Sphaerica : As an aside, if a doctor told you that you had terminal cancer but couldn't tell you the exact time and date of your demise, would you than ignore his diagnosis? This question shows that you miss my point, as I'm supposed to have missed yours! We would call here that a dialogue de sourds. The correct metaphor would be in my mind: if a doctor diagnose a cancer, I don't want him to give me a broad description of the disease and the agony, but a realist prediction of the symptom I'll suffer, a precise assessment of my chance of remission at diverse conditions, the treatments I can access, their costs, their side-effects, etc. And I think it is the usual way we deal with adverse condition. Of course we're "playing with matches". That could be a succinct and symbolic definition of Anthropocene, beginning with the agricultural Neolithic according to Ruddiman, with the industrial Watt's engine commercialization according to Crutzen. (Sooner for me, with the first megafauna extinction of Paleolithic—notably due to fire use, for staying on the metaphor). I take the Anthropocene hypothesis seriously. We affect the whole Earth system, and we know that, so time is to fix the rules of the game. That does not mean to forbid the game. And we won't discuss these rules from the nature's point of view, but from humans' point of view. That's why the consequences of our act on ecosystem services must be precisely adressed, so as to allow their acceptation or rejection.
  25. (Fahrenheit) 451 ppm
    Sphaerica: Kudos on a very well written article. Having said that, perhaps you should add a paragraph or two about the impact that the ever increasing levels of CO2 released into the atmopshere by the activites of mankind is having, and will have, on the the pH of the world's ocean system.
  26. Infrared Iris Never Bloomed
    Great science. Thanks for the information dana1981. However, how long are we going to tolerate Homeostasis arguments?? What evidence is there that the phase space of the climate system has "very" stable points that pertubations out of those points will dissipate and the system will relax to the same point? e.g. warming will cause the Iris to open and the system will return to its previous stable state? Given the vast time that the system has existed, such stable points would have been "explored" by the system and the climate would have settled to a stable state. In the same sentence they claim chaotic dynamic systems that we have no prayer in understanding and Homeostasis. Am I missing something?
  27. Galactic cosmic rays: Backing the wrong horse
    Eric #60, I thought you were better than that. You've provided no supporting evidence (and I suspect there is none) for any of the statements in #60 (yes, the LGM was dusty, but not insensitive to climate change). "Life which can be killed off by possible coincidental solar flares..." Pull the other one, Eric, this is a rubbish climastrological statement. The world might end on December 21st too. jmorpuss, does your link actually have any relevance to the OP?
  28. (Fahrenheit) 451 ppm
    #53 muoncounter : "And thus you would counsel abandonment of this strategy?" It will decline by itself. Nobody need fuzzy and scary pictures: deniers are totally immune, believers are already convinced, policymakers henceforth search precise projections in climate and creative solutions in energy. "AR4 is from 2007" "Failure to discuss an increase in the frequency/intensity of extreme events would be gross negligence indeed" SREX is from 2011: its conclusions are supposed to be the IPCC synthesis of recent scientific literature about extreme events and how to cope with them. Of course we must discuss that. By the way, does SkS wait for the full report? I was amazed to find no article when the SPM was released.
  29. The Monckton Maneuver
    #41 Tristan: I doubt that too many of Monckton's 'mistakes' are truly accidental. Apart from being shown to be wrong on the science more times than the Flat Earth Society (I think Google backs me up on that!; and see John Abraham's presentation; and Peter Hadfield's Monckton Bunkum series), he doesn't make too many gaffes that suggest that CO2 is too strong a primary driver of climate change. Funny, that... #32 SirNubWub - Monckton is responding to the Other Brian's summary point, which states 500 million years, so I really doubt it's a typo. Few ice core records are 500,000 years long - Vostok is ~400,000 and EPICA is ~800,000. And surely you can accept that some of the time Monckton says there's a CO2-temperature correlation, and some of the time he says there is not. That's the inconsistency. His typos are irrelevant, as it's the points he's making that contradict each other. Monckton's truly, demonstrably, not worth listening to.
  30. Galactic cosmic rays: Backing the wrong horse
    jmorpuss, thanks for the links. Lots of interesting effects measured by the Dynasonde but I'm not sure how much energy is involved.
  31. (Fahrenheit) 451 ppm
    skept.fr,
    If somebody tells me ‘we’re nearly sure Amazon will become a savanna before the end of the century’ while science tells me ‘we don’t really know how Amazon will evolve during this century’...
    With this comment you've demonstrated that you clearly missed the underlying point of my post, and so cannot seem to comprehend its value (at least, as I perceive it). My point is that the details (such as if and when the Amazon will transition) are very important on one level, but completely irrelevant on another. If you need details like that you are never going to be convinced, because that is your nature. [As an aside, if a doctor told you that you had terminal cancer but couldn't tell you the exact time and date of your demise, would you than ignore his diagnosis?] But the point of this post is that we don't really have to work out that many of the details to see that what we're doing is very, very risky. We are applying a force of nature that has continually reshaped the world more than a dozen times in the past million years alone. We're playing with fire, plain and simple. Do I guarantee we'll get burnt? No. Can I guarantee that letting a child play with matches will hurt them? No. Do I let children play with matches? No.
  32. (Fahrenheit) 451 ppm
    BillEverett@50: Methane is a potent greenhouse gas (20-30x CO2) because its concentration is so low. It's on the steep initial (non-logarithmic) part of the absorption vs concentration curve. On the other hand, the obvious oxidation channel, CH4 + 2O2 -> CO2 + 2H2O, makes three greenhouse-gas molecules out of 1. This is oxidation by combustion, of course, but even if there are other reaction channels, you're still going to manufacture more GHG than you started with. So the stuff is quite potent.
  33. Huber and Knutti Quantify Man-Made Global Warming
    Yes, because the IPCC uses a consensus process, it tends to be quite conservative, as is the case in global warming attribution.
  34. Huber and Knutti Quantify Man-Made Global Warming
    So this study would imply that the IPCC assessment of "very likely" (90% or above) and "most of the observed warming" (> 50%) since mid-century is too conservative. They appear to be putting a 90% range around 74%-122% (lower bound not extending down to 50% as the IPCC implies). "Skeptics" really need to stop pretending that IPCC assessments are too confident.
  35. The Monckton Maneuver
    Numerical typos during a presentation may be unprofessional but they are not examples of inconsistency. While such gaffes are ripe for mockery, I suspect that this site should focus on the logical inconsistencies rather than the sort of oopsies that anyone can make.
  36. The Monckton Maneuver
    I'd go further on this. The question is not "who" do you trust, but "what". It would be childish to trust any politician but politics is how we take collective action on anything and science must inform policy. Gore would be well-informed but what you should be trusting is his sources. If you "PhD scientists" are refuting him, then they had better be doing that with peer-reviewed papers to the contrary (which would be interesting to hear about on the appropriate thread). The PhD by itself is not a reason to trust. Scientists make mistakes. There is a also a long line of scientists that have "gone emeritus" (Hoyle, Pauli, etc) backing theories that should have been rejected but with which they became emotionally/ideologically attached. However, science itself is self-correcting. A new paper might be "interesting" but it doesnt become really interesting until after other scientists have had a chance to scrutinize in light of their own work. Usually mistakes are picked up then in rebuttals or different interpretations. If a result cant be reproduced then the paper vanishes. However, if the paper really does provide good insight, then it will be used as basis for new science and papers, garnering citations. Sounds complicated to evaluate? Well luckily in climate science you have expert group of hundreds of scientists doing that evaluation for you and publishing their results. The IPCC. The default position is trust their assessments unless there is new science published which will change their assessment. Have you ever looked at IPCC WG1?
  37. The Monckton Maneuver
    SirNubwub - "This makes the whole debate very frustrating to me. .... I can't trust anyone ... because everyone is suspect." I prescribe (a) learning enough science to evaluate claims, (b) using that information to rank sources for reliability, and (c) focus on the science, not the rhetoric. In terms of 'enough science', some basics on statistical significance can help greatly, as can looking at papers supporting one hypothesis or another and then using something like Google Scholar to look at responses. If the majority of responses incorporate the hypothesis and build upon it - great. That hypothesis then has some holding power. If the majority of responses are critical - not so good, that hypothesis has received criticism, it's weak. In terms of ranking sources - if the source has a record of well supported work, it's likely that future work will also be strong. If, on the other hand (as in Monckton's case), the source has a record of distortions, misquotes, and deceptive presentation, you may find it possible to dismiss their work, or consider that the real answer is whatever that source says it is not. This is not to say that anything should be discarded without some examination. A broken clock is still right twice a day, after all. But you can certainly decide what to spend the majority of your time on - based upon previous performance. Rhetoric - flamboyant claims, conspiracy theories, identifying with Galileo, claiming that the speaker never said something in the first place (something recorded, and demonstrably wrong, as per Monckton) - these are clear indications of a poorly supported case. Presenting data with testable assertions, peer-reviewed papers, on the other hand, that's science.
  38. The Monckton Maneuver
    The starting point for deciding what to trust is with what is published in peer-reviewed science journals. The IPCC reports summarize what has been published. Their review process is transparent - you can see what every reviewer said and editors comment if not accepted into report. Blog articles by non-scientists might help elucidate the science but there is a hell of lot of disinformation out there. Short answer, if it doesnt cite peer-referenced literature, then it is probably worthless.
  39. The Monckton Maneuver
    SirWubNub I think I see where you are going with Monckton's 'context'... essentially in the section where he says that there is a correlation between CO2 and temperature Monckton is falsely claiming, as you put it, that, "Temperatures change in one direction first, then CO2 levels follow the change." Then when he says there is NOT a correlation his intended meaning is to, again falsely, claim that CO2 does not influence temperature. So, while the wording of his statements is directly contradictory, his intent was consistent. However, given that this intent is blatantly false (see the 'CO2 lags temperature thread KR pointed you towards') it hardly seems fair to accuse Hadfield of deliberately misrepresenting Monckton... if he HAD interpreted Monckton's statements the way you suggest he'd have to come away concluding that Monckton was flat out lying in both cases. Basically, Hadfield's mistake was thinking that Monckton actually got it right once.
  40. The Monckton Maneuver
    SNW: "makes the whole debate very frustrating to me" Perhaps your frustration is due to your starting point being the Watts and Moncktons et al and not the science. Once you come to understand the science, identifying the charlatans becomes quite easy. And yes indeed, the 'normal person' can do this if he or she has the interest and the time to invest.
  41. The Monckton Maneuver
    DSL- yes, I dislike unfair arguments no matter what their source. This makes the whole debate very frustrating to me. To have to verify everyone and everything is beyond any normal person. I can't trust anyone (Gore, UN, Wattsupwiththat, etc) to do it for me because everyone is suspect. Yet trillions of dollars are at stake.
  42. Greenland has only lost a tiny fraction of its ice mass
    Yes, thanks John for the pointer, and Daniel for imbedding the graphic. That'll teach me to respond to comments without reading back through the earlier parts of the discussion...
  43. Greenland has only lost a tiny fraction of its ice mass
    Moderator DB: Thank you for importing the graphic.
  44. (Fahrenheit) 451 ppm
    skept.fr#51: "The problem is not to say ‘it is not bad’" Look at the 'Most Used Climate Myths' in the upper left of every SkS page. 'It's not bad' is #3. "the ‘it could be worse than all you imagine’ strategy is pragmatically unfruitful for the last 10 years" And thus you would counsel abandonment of this strategy? "what models actually produce in their projections or IPCC reports actually acknowledge in their conclusions." AR4 is from 2007. Research and data continue to accumulate. Contexts which were 'projections' then are coming into focus (see Arctic ice melt faster than expected, for example). "If somebody tells me ‘we’re nearly sure Amazon will become a savanna before the end of the century’" Such focus on a specific prediction about a specific area and a specific time frame tends to make one blind to the larger issues. There are still those in the denial-world who focus on 'the Himalayas will be free of snow by 20xx' as a 'failure,' entirely missing the point that worldwide glaciers and snowpacks are dwindling before our eyes. This is not about predicting specific events; 'the trend's the thing.' "If SkS wants to be trusted, it’s necessary to rely strictly on what science says," Please provide an example where that is not the case; in this, the 'fire age' discussion is very clearly an extrapolation: What, then, will this new age, the one that follows our "green age," look like? ... I would suggest that we are now heading into a "fire age.". "Skepticism about 'doom and gloom' discourse..." Turn this premise around: Failure to discuss an increase in the frequency/intensity of extreme events would be gross negligence indeed.
  45. (Fahrenheit) 451 ppm
    angliss@12 "...that the cross correlations are so broad means that, as a function of lead and lag in a control system..." First, let me be perfectly clear that I am not interested in engaging in any arguments here. My response is intended only to clarify (and in one case amplify) what I meant, nothing more. I use the structure "x leads (or lags) y" only in terms of statistics of time series and never (or almost never) in direct relation to a dynamic system (or control system, as you call it). The time series data may result from observations of nature or may result from running a simulation model of a dynamic system. Within a dynamic system, I might speak of "delayed responses" and "time-lagged feedbacks" or "delayed feedbacks." I consider "simplistic" to be an inherent characteristic of a statistic. Simulation models of real dynamic systems are also "simplistic," some more so and some less so. I have had some small experience with simulation models of varying degrees of simplicity in various fields (demography, economics, politics, hydrology, urban and regional planning, etc.). I expand on my comment about discrimination being related to purpose, although it is off topic. I took a useful lesson from Anatol Rapoport about 1970. If we are interested in the biomass of small (not tiny, not large) mammals in our forest and want to know how it varies in time, then we trap some four-footed furries (FFFs), weigh them to determine their average mass, and conduct some surveys to estimate the total population of FFFs in our forest. We do this year after year and find that the FFF biomass seems to be at a stationary equilibrium. On the other hand, if we become interested in the life cycles of individual FFFs, then we may find it useful to discriminate between long-eared, short-tailed FFFs and short-eared, long-tailed FFFs. We may then find not a stationary equilibrium but a dynamic equilibrium (with an orbit in the phase space) and may even be led to discover a predator-prey relation between foxes and rabbits. The point is that how much (and what) we aggregate and how much (and what) we discriminate should bear a useful relation to our purpose in studying something and frequently has a direct impact on what we can discover. A small thought experiment: Suppose we have developed a perfect paleoclimate simulation model that with the proper initial data exactly reproduces all the available relevant time series data for the time period 799000 BC to 1000 AD. Will this model be able to correctly predict our future climate? I tend to doubt it. If we had such a model, then I think we would know more than we do now about some of the complex interactions we should take into acouunt. Nevertheless, we may be in an entirely new ball game with a new set of rules. Using the analogy with a business firm, we have taken a huge amount of long-term fixed assets (buried hydrocarbons, for example) and converted a small portion of them into current assets (plastics and crops, for example) and the vast majority into liquid assets in circulation (CO2 in the air and water). That may take us outside the applicability domain of our perfect paleoclimate model. Moreover, we appear to have started a long-term rapid warming episode with CO2 as the initiating GHG and with no large ice sheets in the NH. This also may take us outside the applicability domain of our perfect paleoclimate model. I frankly expect the next few thousand years to be very interesting with many new things to be learned about the climatology of Earth. We might even be able to observe what happens in a chaotic region of the system phase space.
  46. The Monckton Maneuver
    SirNubwub - You might be interested in the CO2 lags temperature - what does it mean thread. Monckton argues that paleo records showing CO2 lagging temperature mean that CO2 cannot be a cause of rising temperatures. He fails to understand (or perhaps, fails to indicate) that while CO2 has in the past acted as an amplifying feedback to other forcings (Milankovitch cycles), it has also acted as a forcing itself, bringing the Earth out of "snowball" conditions, and is currently acting as a forcing due to our producing 30B tons per year. Monckton has repeatedly and demonstrably misinterpreted science, misgraphed data in misleading fashion, quoted out of context, etc ("Mis - oh Mis!") - there's much more on the Monckton Myths pages. Personally, I find little to defend.
  47. The Monckton Maneuver
    Let's suppose you're right, SirNubWub. I haven't looked yet, but I will. You say, "If the editor is taking Monckton out of context in the one area that I recognize, I suspect that kind of treatment with the other quotes that are given." By the same logic, you should condemn Monckton, Watts, and many other so-called "skeptics" for their repeated failures of the same type. Are you willing to do that?
  48. The Monckton Maneuver
    In defense of Monckton: I do not know many of contexts of Monckton's statements, so I can't and won't defend them all. Perhaps he is a hack. But I do need to defend him on one issue that I recognized off the top of my head... The context of his statements about there being/not being a relationship between CO2 and temperature is being abused. At 4:50 in the first video, he says that there is a correlation, but this is taken out of context. A sentence is underlined stating that there is a correlation, but the NEXT sentence that is NOT underlined states that the correlation is not what is expected by the AGW proponents. Temperatures change in one direction first, then CO2 levels follow the change. Even Al Gore now recognizes that fact. Mr. Monckton appears to have done a typo and wrote 500 million years for this when it should have been 500,000 years of ice core data. The graph that I believe he is referring to is seen here: http://www.sahfos.ac.uk/climate%20encyclopaedia/co2.html Evidence that he just did a typo in the years includes that the quote shown discusses 4 interglacial periods. I think that would limit the timeframe to hundreds of thousands of years and not hundreds of millions of years in the past. This sloppiness that Monckton has with time frames is seen again at the 5:00 mark of the video where he says 600,000 years and the subtitle indicates he mean 600 million years. In the next scene where he is showing a graph where CO2 is graphed in black and the temperatures in blue, he is looking at data for a different time frame of 600 million years. The graph can be seen here: http://www.climateconversation.wordshine.co.nz/docs/012_no_more_global_warming.htm So, in this case, Monckton is seen to be a dweeb in not being able to keep his time frames correct. Maybe this would disqualify him as being a good source of info. But the video editor is seen to be dishonest in taking things out of context. (not underlining the next sentence that clarifies his statement) If the editor is taking Monckton out of context in the one area that I recognize, I suspect that kind of treatment with the other quotes that are given. I will need to look myself to be sure. But I will have to say this happens all to often when AGW proponents attack skeptics.
  49. Greenland has only lost a tiny fraction of its ice mass
    The article referenced by John Russell #11 is based on “2010 Spike In Greenland Ice Loss Lifted Bedrock, GPS Reveals” posted on the Ohio State University (OSU) website. The OSU posting contains a graphic, “The 2010 Uplift Anomaly (green arrows), superimposed on a map of Greenland showing the 2010 Melting Day Anomaly (shaded in red)” which I have attempted to import into this posting, but alas to no avail. Perhaps on of the more technically capable moderators would be able to do so.
    Response:

    [DB] Try this:

    Click to enlarge

    [Source]

  50. Plimer vs Plimer: a one man contradiction
    re: survival of the species People say such things in the hope that they'll sound bold and optimistic, but the question isn't of survival of a species. What a terrible criterion. "Civilization may founder. Millions or billions may perish, but if enough hominids survive the destruction, well, keep up the good work. Carry on. As you were. Don't tax the carbon." Loons. We're surrounded by loons.

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