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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 82851 to 82900:

  1. Climategate CRU emails suggest conspiracy
    I don't believe the discussion is about comparison of lifestyles between citizens of different regions of the world, though any competant sociologist, geographer, or citizen who can analyze a map, can tell you that the United States and Europe have completely different topographies and urban/suburban living arrangements. Much of which should be evident with the single term "Interstate Highway System" which began originally as the Pershing map in 1921, but was officially implemented as policy by Eisenhauer in the 1950's. (ironically it was his experience with the Autobahn System in Germany in WW2 that caused him to see the benefit of such a system in the US for national defense). As someone who rides a bicycle many more miles a year than I drive a car, I do lament the unfriendly nature of our car culture toward more green transportation. I am realistic enough to understand why it is however. I doubt that we are alone in seeing a culture of conservation replacing a culture of consumption eventually causing economic hardship- surely Europe will see it as well, though it will be less of a shock than it is here. Most humans make their livelyhood engaged in one form of human industrial activity or another. Telling people they have to stop living, and it really is that brutally simple, to save the earth... how do you think they'll take that? To be transparant I am not a contrarian or denier but I'm not 100% sold on the consensus either. Many of us "fencers" speak in percentages, I'm 80/20 that it is warming, 50/50 that it's human caused/could we arrest it with current sociology trends such as the industrialization of India and China. In that respect I think we've already passed that point of no return long ago: http://www.theregister.co.uk/2011/06/09/annual_bp_energy_survey/ I would ask why there is not an uproar that it appears the Kyoto protocol was not only ineffective but probably has facilitated this global GGE increase? Something to do with that talk about "climate justice" or "carbon equity"?
  2. Miriam O'Brien (Sou) at 17:08 PM on 13 June 2011
    Forecast: Permanently Hotter Summers in 20-60 years
    I was able to download the pdf file, thanks for the link. Having suffered and survived (just) record extreme heat during 2009 IMO more attention to extremes is very useful. It's the extremes that get you more than the mean. Home air conditioners often don't work in extreme heat. People don't work either, especially when it's humid as well and your internal body temperature rises too high and you've no way of sweating it out. That's leaving aside the effect on crops, rainfall or lack of, power supplies that give up the ghost along with public transport etc - all of which has happened already in my home state during the heat waves of a couple of years ago. (Under Fig 1 there seems to be a typo - 20th Century when I think they mean 21st Century - if it's not too late to correct.)
  3. Examining Dr. John Christy's Global Warming Skepticism
    chris: you're telling us that Christy & Spencer made no less than five significant errors in their analysis, and that every single one 'just happened' to skew the answer towards indicating that the globe was cooling instead of warming? If they were genuine errors, surely you'd expect at least one of them to, perhaps, be on the warm side, rather than the cool. What are the odds of a climate skeptic making five genuine fundamental errors of analysis, with all five favouring their decidedly minority point of view? I guess it could be a sort of self-reinforcement, where they saw the answers that came out, and said to themselves "Hey, those numbers look really good!", rather than "Hey, those numbers are different to what everyone else in the world is getting, maybe we'd better double-check our analysis..."
  4. Climategate CRU emails suggest conspiracy
    bv "...we have indeed been questioning every bit of our lifestyles..." So how do Europeans manage the same standard of living, including holidays, but produce only half the CO2 emissions of US citizens?
  5. SkS Weekly Digest #3
    Note: I've just done the programming for the Daily Digest - so at the start of each day (eg - midnight Australia time), we'll start sending out an email summarising the posts from the previous day. So right now, subscribers should start receiving the summary for Sunday (featuring just Dana's post on John Christy). The reason for this is two-fold. Firstly, the number of blog posts on SkS seems to be on the rise so getting multiple emails per day was getting a bit much for some subscribers. Secondly (and this was what got me off my butt to do the reprogramming), my webhost complained about me sending out so many emails at one time so I've had to reprogram how the mail-outs function.
  6. Climategate CRU emails suggest conspiracy
    Tom is there any particular reason you chose to include those last two untasteful comments which were clearly directed at my person, which even preempt any opportunity to offer such evidence? I'm not even sure I want to engage someone who seems to be here not to discuss the principals of this issue but seems so willing to pounce on someone criticizing them. However back to the matter of Michael Mann and the Penn State review board, I don't know either way about Mann's actions, but it jumps out at me that the University itself would have the integrity of its science dept under fire for for allowing Mann to be inbvolved with any impropriety like this and would have every reason to try and protect their own- for this reason an "independent review" is almost always called for, not an "internal review" which is what seems to have been what went down here. I don't think I need to produce evidence to prove common sense now, do I? Neither on that or the economic hardships that have been and will continue as a result of sacrifices made by people in the name of conservation. In case you hadn't noticed, the US handily transformed its economy into a service and consumption based economic model by the turn of the millenium, and we have indeed been questioning every bit of our lifestyles and being told that any unnecessary energy use is going to cause irreperable harm and be a burden upon our children. People aren't going to the movies, they rethink that trip on summer vacation. Are you going to argue this is not one of if not the primary factors why our economy is in such trouble? Are we shocked we were selling a message and people actually may have been listening?
  7. Websites for Watching the Arctic Sea Ice Melt
    Thanks - I think I am getting distracted by the snowfall; the rectangles highlighting the differences help a lot.
  8. There's no room for a climate of denial
    Norman, your issue with localised extreme effects of what you describe as a "small" increase in average global temperature is nicely illustrated by this other GISS product. Northern latitudes are much, much more affected than the other two regions displayed. The fact that seasonal changes in the Arctic are also pretty drastic is not the point. Is it different from before? If so, is it getting more or less congenial for the plants, animals and people who rely on this region? And about 40 other questions which spring immediately to my mind. Blocking 'patterns'? We've had a couple of incredible consequences of extended blocking events, Pakistan/ Russia obviously. The possibilities are endless. These may be simple exceptional events. They may be related to Arctic melt. Or the first indicators of a new trend. Or an aberration related to an impending extreme La Nina. There is no way - yet - to know which of these or any other explanations may apply. The one thing we do know. A warmer ocean, a warmer atmosphere, more moisture, less ice will combine to produce more unusual weather effects more often. Which particular effects will have more impact in which regions we won't know for certain until the trends or 'patterns' show up in the numbers. My own view is that we have quite enough numbers already, even if we lack the wit to discern some of the patterns clearly. The glacier, Arctic sea ice and ocean acidifcation, heatwave and flood numbers are quite enough for me.
  9. Climategate CRU emails suggest conspiracy
    batvette @28, the initial review at Penn State was conducted by the Vice President for Research and Dean of the Graduate School; Associate Dean for Graduate Education and Research, College of Earth and Mineral Sciences, and Director of the Office for Research Protections, Research Integrity Officer. In other words, it was an inquiry by Michael Mann's boss, his bosses boss, and the chief ethical officer of the university. Now, unless you are suggesting the unusual idea that a persons boss should never have a role in disciplinary actions with regard to their employees, there could hardly have been more suitable people to make such an inquiry. However, as you are not only suggesting that they are unsuitable, but implying that they are involved in a cover up, perhaps you can present your evidence for what would be professional misconduct on their behalf. You will further notice that on the one matter on which the initial panel made no firm decision, they appointed a five person panel, all of whom where professors and/or heads of departments, and none of whom came from Michael Mann's own department. In other words, they were people who had the necessary knowledge and experience to judge the case but who were by any reasonable standard, independent. Again, your suggestion of a cover up implies professional misconduct by this panel. Do you have any evidence to suggest that professional misconduct - or do you think slanderous allegations require no evidence any time a panel disagrees with you? Finally, you make allegations about the harm being caused by the so far minimal and ineffective action being taken against global warming in Western nations. Babies, apparently, are going hungry because of anti-global warming policies. Frankly, I think that factoid was simply made up. But I'm open to persuasion, show me the evidence of babies being left hungry, indeed starving ("empty bellies") because of anti-AGW policies. In the absence of such evidence (on all three counts), two things will be obvious: 1) Your demand for open access to relevant information is for you a purely tactical demand which you have no wish to comply with yourself; and 2) You think the way to debate is to simply make up "facts" that suite your case.
  10. There's no room for a climate of denial
    Sorry my images did not work. I will send links... GISS January 2011. GISS February 2011. GISS March 2011. GISS April 2011. These links show a drastic change in surface temperature in the arctic regions in a period of 4 months. Was this switch due to the fact the globe has warmed 0.8 C in 100 years and it makes these wild fluctuations or it this just a normal cycle? Given time I could generate a GISS map for every month and look for overall patterns in how temperature moves around and see if blocking patterns that create heat waves in localized areas are a new phenomena that has only started to happen or it is part of the random fluctuations one sees with a temp difference of several degrees from pole to equator.
    Response:

    [DB] "Given time I could generate a GISS map for every month"

    If you do, please do not post them here.  If you have a point (see my response to your previous comment), make it.  Supposing correlations using Eyecrometers without any real analyis is not part of the aegis of this forum.  If that is your wish, please seek a different venue for it.

    Feel free also to write up your point in proper scientific fashion and submit it to a peer-reviewed publication.

  11. There's no room for a climate of denial
    Norman, the predictions from the models regarding extremes in flooding etc can be found here. Note especially 10.3.6.1 for the papers on why this is expected.
  12. There's no room for a climate of denial
    adelady, From the graphs it does appear flooding is increasing in Europe. But is that because the globe is warmer? The hypothesis is not a bad one...warmer temperatures over water allow for more evaporation which will fall as more rain, but is that the cause? Today the North pole is just above 32F while in Texas it was 108F a 76F difference. Weather is driven by a natural pattern to balance this difference. Cold air is heavy and dense and will push under the lighter warmer air. This causes the natural circulation for cold northern air to move south and visa versa. It is why the poles do not get so cold as they would in winter (no insolation) or the equator does not get so hot. This huge difference can cause massive temp swings. One day can be 20F above normal and the next few days can be the same temp below normal. Omaha Nebraska June temps with graph to demonstrate temperature extreme fluctuations. This article on the jet stream shows how dips in the stream can cause colder than normal in one area and warmer in adjacent areas" Images from GISS to demonstrate extremes as they move about, mostly look at the Arctic region. Greenland is very warm in January and Siberia is the cold spot, by April the pattern has totally shifted.
    Response:

    [DB] Before I take the time to try and fix your graphs, Norman, what is your point?  The topic of this post is "There's no room for a climate of denial".  Struggling to follow your thread of conversation, I see no real point other than a stance by you that any warming currently happening is part of a natural cycle or "It's not us".  Which are the subjects of different posts.

    Out of deference to adelady and scaddenp, I'll leave this up to give you the chance to reply.

  13. Examining Dr. John Christy's Global Warming Skepticism
    "I notice he publishes quite a bit in Energy and Environment, unlike most climate scientists" Not to mention other scientists, in particular those dealing with environmental issues. How shocking :)
  14. Climategate CRU emails suggest conspiracy
    Re: A Pennsylvania State U. Board clearing Michael Mann of wrongdoing: In other news, A review board of Exxon stockholders and tanker captains has cleared Exxon Valdez captain Joseph Hazelwood of any wrongdoing, adding "environmental damage was minimal, and birds and fish in the region can just "get over" any ill effects and the oil may actually help them fly and swim faster". Facetious, well sure. What else when I'm reading these kind of arguments for a rebuttal? "Professor Jones’s actions were in line with common practice in the climate science community". And told I'm supposed to just forget about it, instead of ask why we aren't looking at the conduct of more of these people? You're asking everyone in an industrialized nation to feel horrible about getting in a car and going to work and earning a living. Whole segments of our economies are based on such things, people are going bankrupt and putting their babies to sleep at night with empty tummies. If these people have misled anyone it should not be swept under the rug.
    Response:

    [DB] If you are implying something untoward, I would remind you of the Comments Policy here at SkS.

    Please note that posting comments here at SkS is a privilege, not a right.  This privilege can be rescinded if the posting individual treats adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.

    Please take the time to review the policy and ensure future comments are in full compliance with it.  Thanks for your understanding and compliance in this matter.

  15. Freedom of Information (FOI) requests were ignored
    I think the "nothing at all to see here" nature of the rebuttal here is disingenuous in light of the objective purity expected and defended of science. The failure to meet FOIA requests is not at all solely based upon judgements by Phil Jones the requests were of a frivolous nature, as if they were all meant to waste their time which would better be spent on research. From the Inquiry by the House of Commons:(from the wiki page on the CRU emails controversy) "The committee criticised a "culture of non-disclosure at CRU" and a general lack of transparency in climate science where scientific papers had usually not included all the data and code used in reconstructions." " The report added that "scientists could have saved themselves a lot of trouble by aggressively publishing all their data instead of worrying about how to stonewall their critics." Stonewall their critics- these included people who wished to see all the data they used, and see if they could find errors in it which invalidated the work. If Jones intended to block this scrutiny, and in in the emails he used language to the effect saying FOIA requesters would only use the data to cast their work in doubt- how does this follow the scientific method or allow checks and balances? It's funny the rebuttal concludes with a statement about the mountain of evidence not being explained away by the behaviour of a few individuals. The inquiry also concluded: "There is no reason why Professor Jones should not resume his post. He was certainly not co-operative with those seeking to get data, but that was true of all the climate scientists". Perhaps they are saying if we could review the emails of all climate change researchers we'd find similar willful obstruction of scrutiny of their work? The behaviour of a few individuals is all we have the luxury of reviewing. Despite a whitewashing and the fact that most of the emails showed nothing and their work may be actually sound, a few of them did reveal intent to taint peer review and withhold data. Those pushing the more urgent position of AGW would do well to not pretend they see nothing, and instead of claim it's science and can't be flawed by human fault, admit science is only as good as the men behind it.
  16. Examining Dr. John Christy's Global Warming Skepticism
    scaddenp, that SoD item is brilliant! Not so much the post itself (I'm a fully paid up skip-the-equations club member), but the answers to questions in the comments are fantastically clear and straightforward. Anyone wanting to understand the difference between the 'what' of the adiabatic lapse rate and the 'why' of the adiabatic lapse rate can do no better than look at this.
  17. There's no room for a climate of denial
    Thank you for this Norman. I went looking for info from Munich Re and, somehow, got to the general info for the EU. Some great maps, graphs and all sorts of fascinating stuff. Very, very hard to get anything prior to 1970, but have a look at this one giving flood events, and related deaths, since 74. (Don't bother with the 'older versions' link. It doesn't go any further back, the newer versions just add in recent events.)
  18. Examining Dr. John Christy's Global Warming Skepticism
    Just as side-issue, Science of Doom has a piece on Gilbert 2010 published by E&E. This is a real howler which would give some idea about the standards of "peer review" (of denialers by denielers) there.
  19. Examining Dr. John Christy's Global Warming Skepticism
    jonicol - I've noticed that many of the scientifically qualified skeptics (Lindzen, Spencer, and Christy high on that list) will make ridiculous statements in interviews, in opinion pieces, etc. Not in the peer reviewed literature, although Lindzen (with his LC11 paper) appears to be an exception to that. These opinion pieces are not peer reviewed, but acquire status from the reputations of the originators, primary examples of the Argument from Authority fallacy.
  20. There's no room for a climate of denial
    #76 Tom Curtis, Your quote "You, of course, would have us believe that that had nothing to do with the record Sea Surface Temperatures around Australia at the time; and that those record Sea Surface Temperatures had nothing to do with global warming." I would not have you believe any such thing. I do not have enough available information to make any statement one way or the other. I am questioning that global warming is the cause but I am not stating it isn't. I did some research and you may have a good point with your Australia flooding... World record rain events. Rainfall amounts in the 2010-2011 Australian floods. Australian Ocean temp anomaly in 1979. The 1979 Australian temp anomaly for January does so ocean temps about 1 C above normal.
  21. Miriam O'Brien (Sou) at 10:23 AM on 13 June 2011
    Examining Dr. John Christy's Global Warming Skepticism
    That last comment was from SouT. Don't know what happened to my name or post number. Is there a glitch?
    Response:

    [DB] An earlier comment had an html coding glitch, which I fixed.

  22. Miriam O'Brien (Sou) at 10:21 AM on 13 June 2011
    Examining Dr. John Christy's Global Warming Skepticism
    I've looked more closely and Christy does publish quite a lot. I notice he publishes quite a bit in Energy and Environment, unlike most climate scientists.
  23. Are you a genuine skeptic or a climate denier?
    Your point of "confiscation of property of FF investors" seems something of an exaggeration. Until the market begins to adapt, there are no losses. As carbon demand goes down, then so should reinvestment levels, just like I imagine happened to investors in say pagers, or maybe blacksmiths with introduction to auto. Why should FF investors be protected anyway but not those in say fishing, seaside property or any other adversely affected by global warming?
  24. There's no room for a climate of denial
    77 Albatross, I looked at all the abstracts you linked to. Not enough for me to switch my view at this time. I am not closed minded. I like the information you provide and will always consider it. Do you think the links I send are flawed information because they are not in peer reviewed magazines?
  25. Examining Dr. John Christy's Global Warming Skepticism
    jonnicol @18, this should help, although I can't help but feel you would have found what you asked for (which may not be what you are looking for) had you followed the numerous links in the article.
  26. There's no room for a climate of denial
    #72 skywatcher, I thank you for the links. The Stu Ostro report was very interesting but very similar to the video Daniel Bailey posted. It takes many extreme events around the world. My problem is I can't find enough data on weather related disasters (on the Net) for 1954 to develop a case. I would probably have to go to the library and dig up microfilm records of papers and magazines of that year...way too time consuming.
  27. Forecast: Permanently Hotter Summers in 20-60 years
    Oslo @5, that link only takes me to a reproduction of the first page of the article, ie, the abstract plus one paragraph. Registering with Springer-link seems to make no difference. However, from publicly accessible material: actually thoughtful @4, Diffenbaugh and Scherer used the CMIP3 climate model, and reproduce information from that model in their figures. They may also have used other models. In the graphs linked below they show the modelled (black) and observed (black dashed) probability density function for differences between mean and maximum temperatures in the 1980-1999 period, which should give some idea of empirical fit. WheelsOC @1, from the graphs of the probability density function of regional areas, it is evident that there is far more variability in temperature in mid latitude regions (China, North America, Mediterranian, Southern Africa) than there is in tropical regions (India, S E Asia, Northern South America, Central Africa). This is true in both JJA and DJF. The greater range in temperatures means a greater warming is required before the minimum temperatures consistently exceed the maximum temperatures. Consequently this study is probably consistent with previous studies showing greater mean warming outside the tropics.  
  28. Examining Dr. John Christy's Global Warming Skepticism
    It would be nice to see somewhere in this site or on an acceeible link given here, the scientific refutations of the work of Lindzen Spencer and Christy. Nothing above tells us anything at all about the science being criticised. Somewhere, apart from the list of inaccessible papers, there should be a clear review article which other interested scientists who are retired or who no longer have easy access to a science/university library. Statements such as "After hearing Christy make erroneous and political rather than scientific statements on Australian Radio.." only makes the denouncement of his work less plausible. "Political" is difficult to interpret or quantify, but you should be able to substantiate with a few words and/or with reference to an easily accesible detailed, scientific argument, which does not need to be "peer reciewed" since the readers should have enough scientific understanding to judge it, but shows clearly why Christie's scientific statemnts are "erroneous".
    Response:

    [dana1981] This is a summary post.  As Tom Curtis notes in #19, Christy's specific claims are addressed in the posts linked within the article.  Or you could try clicking the Christy Crocks button, which has a tab listing all the posts pertaining to Christy.

  29. There's no room for a climate of denial
    Norman wrote : "what would interest me is mechanisms to explain how a small increase in global temps will lead to extreme climate events (more heat waves, floods, droughts, wildfires...). This is the part of the science I am interested in. The forces that make a sustained drought. Texas has a very bad drought condition. How did the 0.8 C degree Global temp increase cause this and sustain it?" Question (and answer) 9 at this link should help you.
  30. Examining Dr. John Christy's Global Warming Skepticism
    sout "He doesn't appear to do any research into the forces or impacts on climate." He's a scientist alright. But he seems to be hampered by other concerns so he's not free to go where the evidence should take him. I think of him as a musician sentimentally attached to an instrument which has lost the capacity to change key. He's perfectly capable of playing any piece of music, but he won't, because he refuses to replace or repair the only instrument he's willing to use.
  31. There's no room for a climate of denial
    Eric, US is 2% of earth area. I believe the sky was pointing you to global records.
  32. Forecast: Permanently Hotter Summers in 20-60 years
    I have been informed by Stanford (to be precise, Woods Institute for the Environment) that the full report is available online at http://www.springerlink.com/content/l2371617777412kp/ Comments made so far can perhaps be revised after reading the full online article.
  33. Are you a genuine skeptic or a climate denier?
    By the way, I hope CATO and other libertarian groups are loudly in favour the proposals to scrap fossil fuel subsidies. I would have thought subsidies of any kind an anathema to the right but so far that doesnt seem to be the case? (I only support subsidies on education and health). Killing any form of subsidy on fossil fuel is surely the simplest way to start.
  34. Are you a genuine skeptic or a climate denier?
    “I am simply frustrated by your apparent lack of willingness to adapt.” Eric, there is deeper issue here which is why I keep pressing. Firstly, your “adapt” stance appears to imply that you think it is reasonable for you to enjoy the benefits while other people pay the cost? Seriously? The right wing here do a lot of complaining about paying (tax) for other people’s benefit (education/health subsidies) and I doubt it is different in US. So surely the principle of paying for the adaption is acceptable? More importantly, you have stated in later post your reasons for opposition to carbon tax – I am trying to find an alternative to carbon tax which is more acceptable hence I am interested in possibilities that result from (legal) avoidance of liability and how conflict of rights is managed. You have so far avoided these questions. Remember that the hypothetical situation is what is “libertarian way” if convinced that cost of adaption will be higher than cost of mitigation. Denying that it could ever be possible isnt helping. You claim frustration about lack of specifics of cost and effects. Well the scientific consensus (as opposed to the Greenpeace version) on effects of climate change is found in IPCC WG2. Surely it’s perfectly clear there though regarded as excessively conservative by climate scientists. A costing of these effects is in Stern report. The costings have been criticized but I know of no better attempts that didn’t also assume (with no scientific basis) that WG2 was alarmist instead of conservative. One big problem is that this is area of science with least certainty. Policy must be made on imperfect knowledge. “OTOH, I agree the free market is far from perfect.” So do I. What I want is effective solutions. In many situations, a free or near free market provides them. When they don’t I look for alternatives rather than demanding some philosophical purity. How come an imperfect market is acceptable but an imperfect tax isn’t? (Don’t bother with that, I know the answer). Your answer here appears to be that if everyone was as wealthy as you, then there wouldn’t be a problem. (Or hope it is rather "I'm all right Jack, dont bother me"). Can everyone be as wealthy as you? In Bangladesh, population density is 11 per hectare for instance. Does the world have that much resource? It’s easy to create a political narrative using Haiti or other countries as examples – the problem is really ineffective government and overcoming the real barriers to changing that is not a simple task. Saying that a democratic rule of law with free market is the answer is easy – making it happen is not. “So I have to ask you, since your wealth came from the market, why won't you use your wealth to adapt?” I have no choice. What I resent is paying for a problem I have little responsibility for. Responsibility for this problem can be seen here here. “Why won't you promote the economic freedom needed to create that wealth in countries like Bangladesh. If you don't think that is feasible, why won't you give a small portion of your wealth to private relief organizations?” I do both, and not that small a portion either. “we don't talk about the airport anymore”. You are implying that I was overestimating the cost of adaption. The technological and monetary challenge is in fact enormous and I am not sure it would ever be built. Abandonment seems more likely. I pointed that out because fixating on airport rather than transport corridors was inappropriate. This method fixes all three and preserves land. Returning to original inquiry, so far the answer is bleak. It seems that even if we knew emissions would kill us, there is no libertarian way to limit emissions. I am still interested though in exploring the questions of resolving conflict of rights and legal responsibility.
  35. Examining Dr. John Christy's Global Warming Skepticism
    Glad you all like my post, the principle issue at stake is climate sensitivity, which from current records is low, as massive climate change has still not happened. Climate sensitivity is only high when, ice albedo is dominant, or when atmospheric albedo is affected by external events. Current CO2 levels of @ 400 ppm mean that sensitivity will remain low until a cataclysmic external input, and effectively means that the current glacial has ended. James Lovelock was right and GAIA is the dominant climate driver. Mad Mike
    Response:

    [dana1981 Wrong.  See Earth hasn't warmed as much as expected.

  36. Examining Dr. John Christy's Global Warming Skepticism
    Albatross at 07:47 AM on 12 June, 2011 since you brought up the constrast between the dreary attempts to contrive fault in Mann et al's paleotemperature reconstruction, and the free-ride given to Spencer and Christy despite their 15 years of mis-analysis, it's worth pointing out another interesting contrast between these two. Mann et al's "hockey stick" was really first published in their 1999 paper that included temperature reconstruction back to around 1000 AD. Mann et al were careful to highlight the uncertainties in their analyses as is apparent from their title: Mann ME, Bradley RS, Hughes MK (1999) Northern hemisphere temperatures during the past millennium: Inferences, uncertainties, and limitations Geophys. Res. Lett. 26, 759-762 Despite the "uncertainties and limitations" Mann et al have turned out to be broadly correct at least as indicated by the subsequent decade of updated analyses with improved methods and data. Christy and Spencer's analysis of tropospheric temperatures was hopelessly incorrect for 15 years and had repeatedly to be corrected by others. The gave no indication that there could be any doubt about the reliability of their analysis as indicated by the title of their main paper: Spencer RW, Christy JR (1990) Precise monitoring of global temperature trends from satellites Science 247, 1558-1562. As we know their "monitoring of global temperature trends" was anything but "precise", and it was horribly inaccurate.
  37. An Interactive History of Climate Science
    If Climatologists could accurately predict the weather a year in advance, then people would have a reason to trust predictions made for 20 or 100 years out. For now, no one has any reason to accept the climate studies.
    Moderator Response: [Dikran Marsupial] climate modelling does not depend on the ability to predict weather, only simulate weather with similar statistical patterns. They are based on Monte Carlo simulation methods, a well established branch of statistics developed for the Manhattan project, and have been successfully used to model a very wide range of complex dynamical systems. Climate is the long term statistical behaviour of the weather. Weather is chaotic and unpredictable, its long term statistical behaviour however is not, and can be predicted with useful skill, see for example Hansens 1988 pojections. The above comment is commonly encountered in discussions about climate models, however it is indicative of a lack of understanding of the way in which climate models operate and of the difference between climate and weather.
  38. An Interactive History of Climate Science
    Two points Aunt Sally: 1. the numbers in the interactive graphic are cumulative. There are only 4 "pro-AGW papers" for 1975 in the graphic. 2. "global warming" and "climate change" are restrictive designators for climate-science related research. If you use a less restrictive designator (e.g. "climate") there are lots of potentially relevant papers from 1975. For example of the 164 hits from a ISI Web of Science search for topic "climate" (year=1975), the following papers are likely to be relevant, and this list is only from the first 40 out of 164 hits: PARAMETERIZATION OF CLIMATE - GLACIER - RELATION Author(s): HOINKES H, STEINACKER R Source: RIVISTA ITALIANA DI GEOFISICA E SCIENZE AFFINI Volume: 1 Pages: 97-104 Supplement: Suppl. I Published: 1975 THEORY OF ENERGY-BALANCE CLIMATE MODELS Author(s): NORTH GR Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 32 Issue: 11 Pages: 2033-2043 Published: 1975 EFFECTS OF CHANGING SOLAR CONSTANT ON CLIMATE OF A GENERAL CIRCULATION MODEL Author(s): WETHERALD RT, MANABE S Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 32 Issue: 11 Pages: 2044-2059 Published: 1975 CARBON DIOXIDE CLIMATE CONFUSION Author(s): SCHNEIDER SH Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 32 Issue: 11 Pages: 2060-2066 Published: 1975 Title: LONG-TERM CYCLES IN VARIATION OF ATMOSPHERIC RADIOCARBON, RELATED TO CHANGES IN HOLOCENE CLIMATE Author(s): MCFADGEN BG Source: SEARCH Volume: 6 Issue: 11-1 Pages: 509-511 Published: 1975 Times Cited: 1 NONSPHERICAL AEROSOLS AND CLIMATE Author(s): CHYLEK P, COAKLEY JA, GRAMS GW Source: TRANSACTIONS-AMERICAN GEOPHYSICAL UNION Volume: 56 Issue: 12 Pages: 997-997 Published: 1975 CLOUD PARAMETERS FOR CLIMATE STUDIES Author(s): COAKLEY JA Source: TRANSACTIONS-AMERICAN GEOPHYSICAL UNION Volume: 56 Issue: 12 Pages: 997-998 Published: 1975 ROLE OF DESERTS ON GLOBAL CLIMATE Author(s): ELLSAESSER HW Source: TRANSACTIONS-AMERICAN GEOPHYSICAL UNION Volume: 56 Issue: 12 Pages: 998-998 Published: 1975 WEATHER AND CLIMATE MODIFICATION - HESS,WN Author(s): SEWELL WRD, FOSTER HD Source: HUMAN ECOLOGY Volume: 3 Issue: 4 Pages: 289-291 Published: 1975 CLIMATE OUTLOOK - VARIABLE AND POSSIBLY COOLER Author(s): LANSFORD H Source: SMITHSONIAN Volume: 6 Issue: 8 Pages: 140-& Published: 1975 RECENT SECULAR VARIATIONS IN MID-ATLANTIC WINTER EXTRATROPICAL STORM CLIMATE Author(s): RESIO DT, HAYDEN BP Source: JOURNAL OF APPLIED METEOROLOGY Volume: 14 Issue: 7 Pages: 1223-1234 Published: 1975 CLIMATE RESPONSE AND FLUCTUATION DISSIPATION Author(s): LEITH CE Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 32 Issue: 10 Pages: 2022-2026 Published: 1975 NUMERICAL EXPERIMENT ON EFFECTS OF REGIONAL ATMOSPHERIC POLLUTION ON GLOBAL CLIMATE Author(s): KOENIG LR Source: JOURNAL OF APPLIED METEOROLOGY Volume: 14 Issue: 6 Pages: 1023-1036 Published: 1975 APPLICATION OF SOIL DUST OPTICAL-PROPERTIES IN ANALYTICAL MODELS OF CLIMATE CHANGE Author(s): RUSSELL PB, GRAMS GW Source: JOURNAL OF APPLIED METEOROLOGY Volume: 14 Issue: 6 Pages: 1037-1043 Published: 1975
  39. Bob Lacatena at 06:00 AM on 13 June 2011
    Websites for Watching the Arctic Sea Ice Melt
    54, Chuckbot, Not sure what you're looking at. Here's the most recent view, with the differences focused by the yellow boxes. You'll note that the areas of increased melt are all at lower latitudes around the edges (warmer temps, warmer water). Honestly, at the moment, in my opinion, this year is clearly shaping up to be the worst on record. It could turn on a dime, but right now, my opinion is that without an abrupt stall (as happened last year) we're actually in for the new record low. (I also skipped the area of the Nares Strait, at the upper left corner of Greenland from this perspective. It's not as obvious, but in 2011 you see an empty patch in the strait itself, with green/sparse ice, while in 1980 you see a very small empty patch surrounded by more higher ice concentrations). If you go to Cryosphere Today to see the more detailed image, you can see it better, as well as seeing how much further advanced the melt is just a few days later than the 6/9 images here.
  40. An Interactive History of Climate Science
    Continuing from my previous post... if I do a web of knowledge search for "global warming" or "climate change" in the topic [which is searching (i) Science Citation Index Expanded (SCI-EXPANDED); (ii) Social Sciences Citation Index (SSCI); and (iii) Arts & Humanities Citation Index (A&HCI)], I find only 4 peer-reviewed publications for 1975 -- a far cry from the 230 publications for that year that this graphic indicates. Not sure yet why the spectacular discrepancy, but would be interested to year from the creators...
  41. An Interactive History of Climate Science
    This is a wonderful visualization. However... ...I'm a bit "skeptical" about the numbers. Specifically, they don't seem to square very well with the numbers in Peterson (2008) -- as pointed out in severa SkepticalScience posts (see here, for example: http://www.skepticalscience.com/christy-crock-1-1970s-cooling.html). Petereson found a total of 71 peer-reviewed publications on the topic of global warming and climate change in the 15-year period 1965-1979. Yet according to the graphic in this post, the year 1975 alone had 240 publications. Something seems askew...
  42. Eric the Red at 05:45 AM on 13 June 2011
    There's no room for a climate of denial
    Sky, I understand that some people may not accept this as a valid source, but it is tabulated nicely and correlates well with other sources. http://en.wikipedia.org/wiki/U.S._state_temperature_extremes Almost half the state records hgih were set in the 1930s. The last new state record high was set in 1995 (two have been tied since).
  43. Websites for Watching the Arctic Sea Ice Melt
    'Notice above how much more ice there was in 1980. The snow data is only present for the past few years.' I keep looking and keep not seeing it - it looks like there is more ice at present? I looked up the comparison again and it looks the same there; perhaps the answer is that the 2011 image displays sea + land ice whereas the 1980 image only displays sea ice? The website writes: 'Historic snow cover data not displayed on these images. ... Snow cover data is displayed only for most recent dates.'
  44. There's no room for a climate of denial
    Norman, With a couple of exceptions, you seem intent on not providing peer-reviewed papers form the scientific literature to support your claims. You, contrary to advice offered to you, continue to cherry-pick and ignore the sage advice of some here. You posts are a perfect example of someone who is in denial about the severity of the situation we face should we continue along this path. And you fail to recognize that paleo data is one of the major reasons climate scientists are concerned about what we are doing and where we are headed, rather than a reason fro complacency or to fuel denial. In fact, with respect, you have your logic backwards, and your attempt to justify the reason for no concern amounts to nothing more than a form of argumentum ad absurdum. Read the IPCC AR4 they have extensive sections on past climate, yet they understand that we are in for a bunch of hurt should we continue along this path. Also, do not forget that the global population will be near 10 billion later this century, so climate disruption will likely exert an even greater toll than it would have centuries ago when people had the ability to move. Here is a lists of some recent papers on extreme rainfall from the literature, available links here: "Wentz et al. (2007, Nature): "Climate models and satellite observations both indicate that the total amount of water in the atmosphere will increase at a rate of 7% per kelvin of surface warming. However, the climate models predict that global precipitation will increase at a much slower rate of 1 to 3% per kelvin. A recent analysis of satellite observations does not support this prediction of a muted response of precipitation to global warming. Rather, the observations suggest that precipitation and total atmospheric water have increased at about the same rate over the past two decades." Zhang et al. (2007, Nature): "We estimate that anthropogenic forcing contributed significantly to observed increases in precipitation in the Northern Hemisphere mid-latitudes, drying in the Northern Hemisphere subtropics and tropics, and moistening in the Southern Hemisphere subtropics and deep tropics. The observed changes, which are larger than estimated from model simulations, may have already had significant effects on ecosystems, agriculture and human health in regions that are sensitive to changes in precipitation, such as the Sahel." Lau et al. (2008, JGR-A) Allan et al. (2010, Env. Res. Letters): "Analysing changes in extreme precipitation using daily data within the wet regions, an increase in the frequency of the heaviest 6% of events with warming for the SSM/I observations and model ensemble mean is identified. The SSM/I data indicate an increased frequency of the heaviest events with warming, several times larger than the expected Clausius–Clapeyron scaling and at the upper limit of the substantial range in responses in the model simulations." Allan and Soden (2008, Science): "We used satellite observations and model simulations to examine the response of tropical precipitation events to naturally driven changes in surface temperature and atmospheric moisture content. These observations reveal a distinct link between rainfall extremes and temperature, with heavy rain events increasing during warm periods and decreasing during cold periods. Furthermore, the observed amplification of rainfall extremes is found to be larger than that predicted by models, implying that projections of future changes in rainfall extremes in response to anthropogenic global warming may be underestimated." New et al. (2001, IJC): "Data from a number of countries provide evidence of increased intensity of daily precipitation, generally manifested through increased frequency of wet days and an increased proportion of total precipitation occurring during the heaviest events. Over most land areas there has also been an increase in the persistence of wet spells."" Also, from here, "Lenderink and Meijgaard (2008, Nature): "Here, we analyse a 99-year record of hourly precipitation observations from De Bilt, the Netherlands, and find that one-hour precipitation extremes increase twice as fast with rising temperatures as expected from the Clausius–Clapeyron relation when daily mean temperatures exceed 12 °C"
  45. actually thoughtful at 04:10 AM on 13 June 2011
    Forecast: Permanently Hotter Summers in 20-60 years
    I would like to understand which models they are using that show such good correlation with empirical data - this is always a point of contention amongst skeptics, that models are not accurate. Which models did this team rely on and how good was the fit?
  46. History Matters: Carbon Emissions in Context
    Eliminating the use of carbon fuels should be the goal of any country's effort to stop manmade global warming. Thus, Australia should spend 100% of its "global warming" money in the search for new energy sources that will eliminate the need for carbon energy. If not 100% then what about 50%? Ironically, this isn't happening and will never happen, will it? It's intuitively obvious that taxing the use of carbon fuels is the way to go... especially when there's no alternative full time energy available... Right? WRONG! Money should never be spent on any CO2 reduction scheme unless and until taxpayers are informed of the quantifiable benefit that would result. Ironically, this isn't happening and will never happen, will it? As a taxpayer, a person of modest means, why should you be OK with this?
  47. Extreme weather isn't caused by global warming
    "A strong jet stream is required." Upper or low-level jet or both? And not necessarily. You are clearly talking through your hat Norman. You might want to wander over to Desmogblog where I have been in a technical discussion with someone who claims to be in the know about these things. Regardless, the experts agree that trend now and in the future in tornadoes are hard to pin down, mostly on account of the poor nature of the data and changing building codes, and monitoring platforms etc. What we do have confidence in is that extreme precipitation events and severe thunderstorm events are likely to increase in certain areas as low-level moisture increases (see Desmogblog post for papers). In fact, extreme rainfall events are already on the increase.
  48. Miriam O'Brien (Sou) at 03:48 AM on 13 June 2011
    The Critical Decade - Part 3: Implications for Emissions Reductions
    I understand the point that it's not too late yet. However, given the economic growth rates in developing countries and community expectations that goes with that, it's difficult to conceive of them being able to cut emissions and maintain civil order. Even in developed countries where carbon emissions aren't increasing to the same extent (but still increasing) it will be very difficult politically to stabilise let alone reduce emissions. I remain hopeful but not optimistic. And I'm generally an optimist. I see very difficult times ahead for the world as a whole.
  49. Geologists and climate change denial
    I've met geologists who use their knowledge of the past to state the bleeding obvious: "The climate has always changed". My standard response is that "Indeed it has, but the last time, there was not a civilisation in the way"! Denier geologists who use this argument are particularly math-challenged. It's not just climate change that's the issue; it's the *rate* of change that poses the biggest challenges. Using denier geologist logic, I could argue that driving your car into a tree at 60 mph is no problem. After all, cars have decelerated from 60 to 0 with no harm to the passengers countless times in the past. Therefore, only auto safety alarmists would argue that folks shouldn't drive their cars into trees at 60 mph.
  50. Miriam O'Brien (Sou) at 03:30 AM on 13 June 2011
    Examining Dr. John Christy's Global Warming Skepticism
    After hearing Christy make erroneous and political rather than scientific statements on Australian Radio, and seeing his performance at US House Committee hearings, I figure that he's not really a climate scientist as such and doesn't care about his scientific reputation (he must have tenure and not be ambitious professionally I suppose). Does he do anything other than convert satellite readings into temperature equivalents (and has even got that badly wrong in the past from what I read)? His articles in google scholar suggest not much. He doesn't appear to do any research into the forces or impacts on climate. But happy to be corrected.

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