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Comments 120001 to 120050:

  1. HumanityRules at 18:00 PM on 6 May 2010
    Kung-fu Climate
    38.Jeff Freymueller Here's a list of Mann's proxy's. I don't fully understand it but does Mann only use 18 non-tree proxies as well?
  2. Kung-fu Climate
    Thanks, Rob, for this post, which contrasts with the somewhat dreary and predictable tone that tends to characterises this blog. There's obviously scope for more work to be done on recent (i.e. during the present interglacial) paleoclimate, as I'm sure both Loehle and Mann would agree. When we've done with the MWP, then there's the (possibly even warmer) R (Roman) WP to consider. Climate varies, and has always done so. A source of plentiful references to literature on the MWP is the climate sceptic site www.co2science.org In the end paleoclimatology still leaves us with the question as to what has been happening to the earth’s climate during the last 150 years or so. There is a whole range of potential climate forcings which on theoretical grounds one might expect to have influenced, and in some cases raised, surface temperatures. Many of these forcings are anthropogenic. The net effect of all the known and unknown influences appears to have been a fluctuating upwards trend in surface temperatures. Disentangling the various forcings, in particular the anthropogenic ones, is not going to be a simple task. However a start on this task has been made by the group of workers associated with Colorado meteorologist Roger A. Pielke Snr. Pielke is not a climate sceptic - he believes in an anthropogenic influence on climate. He and his co-workers have an impressive list of peer-reviewed articles to their names, although there is little or no consideration of their work in the IPCC WG1 reports of 2001 or 2007 However this literature is referenced at Pielke’s blog www.pielkeclimatesci.wordpress.com
  3. Rain in the Canadian High Arctic in April?
    Perhaps that could be a new skeptical argument... "too much data", or "too much new data".
  4. HumanityRules at 17:14 PM on 6 May 2010
    Kung-fu Climate
    34.scaddenp Can you get estimates of forcings based on changes in atmospheric temperature? An El Nino can raise the global temperature by releasing more energy from the ocean without any change in radiative forcing. Ocean circulation can work on time scales of upto 1000years, can changes in energy release from the ocean work on these scales? Again Trenberths "missing energy" has one explanation in novel ocean processes that bring the deep ocean into play. To what extent can we rule out changes in ocean energy exchange rather than (or in combination with) changes in radiative forcing to explain changes in atmospheric temperature? The discussion of energy budgets in an earlier posting got me thinking of the atmosphere more as a conduit for energy transfer between the oceans and space. I think the variation of energy coming into the earth from the sun (or lack of it) has been well discussed on this website. And alot of time is spent on the transfer of energy through the atmosphere. But I haven't seen alot about the role of the oceans and the processes of energy transfer back to the atmosphere. Maybe this is just the wrong way to think about things and completely irrelevant to this discussion but it's something I've been puzzlinmg since the Trenberth / Pielke discussion.
  5. Jeff Freymueller at 17:01 PM on 6 May 2010
    Kung-fu Climate
    Nice work, Rob. Two questions come to mind. The first is that there must be far more than 18 non-tree proxies available, right? So how did Loehle select the 18 that he used? The second is how many of the proxies shown in the final figure are independent -- based on totally different data? If some are independent, they could be averaged to reduce random errors -- by eye an average of any two or more of the curves would tend to look more like a ... hockey stick. On the point of noise and averaging, one obvious drawback of using only a few records is that you can't average down noise. In the presence of noise (or non-climate variation), you would expect that a reconstruction based on fewer records will show more variability simply because of noise. What did Loehle give for the error bars on his reconstruction? Only with the error bars on the plots can you tell whether the variations are likely to mean anything. This is the biggest reason I prefer the IPCC's version of this kind of figure: they show the error bars through a shaded region.
  6. mothincarnate at 17:00 PM on 6 May 2010
    Kung-fu Climate
    Great write up, as always. I've recently ended up in a fight with an economist from NZ which has ended in a stalemate position with the science only reflected on one side of the debate. For very much the same reason as you summed up at the end of the piece, that's why I am where I am. I have a 10yo son and thinking about him I often find myself wondering why are we watching a fight which doesn't seem to address the point, when regardless of the slope, we are obliged to do our best to leave the place better than we found it. Nothing would be worse than watching him enter the workforce having to address issues that I was aware of and did nothing to mitigate in any way. As with this debate I found myself getting wrapped up in; focusing on such a fight itself induces a form lethargy instead of action. Anyway, cheers for putting the fighter in the same ring together so we can get a good look at what the fight is truly about! Tim
  7. nautilus_mr at 15:15 PM on 6 May 2010
    Kung-fu Climate
    The Hockey stick is far from discredited -and certainly not by McIntyre and McKitrick. Readers interested in reading what the 'smartest guys in the room' have written about M&M should look at RealClimate's guide to the Hockey stick. NASA's Gavin Schmidt uncovers the failings of M&M 2007 in detail here.
  8. Doug Bostrom at 15:11 PM on 6 May 2010
    Kung-fu Climate
    So no specific complaint about the Hadley data Poptech was griping about. In any case, fortunately science does not work by having researchers slavishly following scripts produced by earlier workers, so even if there were a problem there we'd have already seen it. In fact, the "problem" Poptech is worried about turns out not be any problem at all but rather an advantage. Thanks for helping to clear that up, Poptech.
  9. Kung-fu Climate
    And funnily the uncertainties in the determining the forcings are also high. See the Mann 2009 paper for error-bars in determining global temperature as well as the error bars on various model reconstructions based on estimated forcings. Nothing that invalidates the climate model which includes the physics of greenhouse gases.
  10. HumanityRules at 14:53 PM on 6 May 2010
    Kung-fu Climate
    28.scaddenp "......but whether the MCA is consistant with known forcings" "If the global variation in MCA/LIA... " Which MCA/LIA? fig 3 suggests there are plenty to choose from.
  11. carrot eater at 14:24 PM on 6 May 2010
    Kung-fu Climate
    On second thought, maybe CRU was chosen here because it goes further back in time than GISS. So you get more overlap with the reconstruction. There's also more uncertainty in that period, though.
  12. Doug Bostrom at 14:21 PM on 6 May 2010
    Kung-fu Climate
    Speaking of Hadley (still), I wonder Poptech if you feel you are better qualified to recommend a reliable source of data than is Dr. Loehle? If so, why do you include Loehle's paper in your list, presuming you are the authentic Poptech aroused to defend Loehle? Why should you believe his conclusions when you disagree on his choices regarding such a fundamental matter?
  13. carrot eater at 14:21 PM on 6 May 2010
    Kung-fu Climate
    How does it matter whether you graft CRU or GISS as your choice of instrumental record? The plot is going to look exactly the same either way, especially with the smoothing and the zoomed-out axes. Harping on that is a red herring and a pointless distraction from a discussion on the merits of Loehle's simplistic methodology.
  14. Doug Bostrom at 14:18 PM on 6 May 2010
    Kung-fu Climate
    Ho-hum on the "lost" data, Poptech. Or can you say why it matters? What, specifically, is the problem with the Hadley set you're complaining over?
  15. Kung-fu Climate
    Poptech. If you use GISS it makes no difference whatsoever to the graph. CRU is something like 95% GISS and before climategate was much preferred by skeptics since it showed generally slightly less warming. The issue with MCA is not some as yet unexplained "natural variation" but whether the MCA is consistant with known forcings. Nothing to suggest it isnt and plenty to suggest you dont get current temperatures without including the CO2 forcing. If the global variation in MCA/LIA is stronger than current understanding it says sensitivity is higher and we are in more trouble.
  16. HumanityRules at 14:11 PM on 6 May 2010
    Kung-fu Climate
    11.CoalGeologist The Journal of Quaternary Science in Jan 2010 produced a special edition entitled "Special Issue: The 4th IPCC Report and Beyond: Palaeoclimate Perspectives" The introductory article makes good reading. IPCC and palaeoclimate - an evolving story? (p 1-4) Chris J. Caseldine, Chris Turney, Antony J. Long Published Online: Dec 4 2009 12:14PM DOI: 10.1002/jqs.1336 It nicely goes through the history of paleoclimate data in the IPCC. It would suggest that it's not just the "sceptics" that have increasingly seen the importance of this field of study. When you say "climate scientists have looked long and hard for contemporary natural drivers other than AGHGs" I'd suggest they look longer and harder. I'd like to know the role of clouds and water vapour, aerosols and given the 'missing energy' issue just what is the role of the oceans.
  17. Doug Bostrom at 14:01 PM on 6 May 2010
    Kung-fu Climate
    Poptech, why should it matter if the current warm period is within the range of natural variations? The current warm period appears -not- to be a natural variation according to the best synthesis we can produce. The paper does not seem relevant to the topic, except maybe as a rhetorical lever.
  18. Doug Bostrom at 13:59 PM on 6 May 2010
    Kung-fu Climate
    Poptech, Loehle apparently has no issue w/Hadley, he supplied it to Ron after all. Why should you? Are you aware of any problems w/Hadley data? If so, specifically what are they?
  19. Doug Bostrom at 13:55 PM on 6 May 2010
    Kung-fu Climate
    Nice article, Rob, and thank you. But I guess I'm w/CoalGeologist on this-- what's the big deal? Strangely enough (or perhaps I'm not as strange as I think) I wasn't aware of this article prior to reading about it here. What I gather is, Dr. Loehle has teased out what he sees as better understanding of the MWP's magnitude although not its areal extent and he adds the further conclusion "The warmest tridecade of the MWP was warmer than the most recent tridecade, but not significantly so." What if anything about this paper speaks to current climate forcing theories, prognostications and observations?
  20. nautilus_mr at 13:47 PM on 6 May 2010
    Kung-fu Climate
    The deniers' focus on discrediting the hockey stick is due to its political value, not because of its role in the science. It is the most easily recognisable symbol of AGW and, I would argue, did more to win broad public support than any other item of evidence. Like many of the contributors above, people who see global warming as a scientific matter tend to scratch their heads about the extreme emphasis on this one small part of a huge body of research. But we must remember: certain well organised and noisy organisations see data and scientific jargon as nothing but a political tool, not to achieve truth, but 'truthiness' (S. Colbert's contribution to modern english). Fox and the Heartland Institute couldn't care less about scientific accuracy. They are after the 'hearts and minds' and they understand the minds are easier to win with good old FUD, than with complicated analysis.
  21. Rob Honeycutt at 13:43 PM on 6 May 2010
    Kung-fu Climate
    @Poptech... I have to disagree with you about the battle. I believe you maybe do not understand my broader point that there are a lot of versions of the paleo reconstructions, each vying to be the definitive chart. But I'm trying to say that is far less important than what we see today and how we respond to the challenges we face. Honestly, I am more concerned when I see charts like Loehle's with a large variation in temperature because that suggests much greater climate sensitivity and could spell a much worse situation for us going forward. We should all HOPE that it's Mann's chart that is the more accurate one. Then we may be able to respond in time to what could be a looming crisis.
  22. Rob Honeycutt at 13:37 PM on 6 May 2010
    Kung-fu Climate
    @Poptech... You are correct. I misread Loehle's statement in his paper. But the data that I appended to his chart is the Hadley data that he provided to me.
  23. garythompson at 13:09 PM on 6 May 2010
    Kung-fu Climate
    i enjoyed this piece Rob, thanks. a question i have always had was how accurate are tree ring proxies from many years past? can someone point me to a link or paper that describes this tree ring proxy procedure, how it was verified, etc.? without being familiar with the procedure, my question is as a tree ages for hundreds of years, those inner rings would come under pressure and perhaps shrink thus skewing the actual temperature of those older timeframes. i'm not a biologist nor do i have extensive experience doing this but i'm just mainly intersted in learning about the procedure. many thanks ahead of time for helping me out!
  24. Kung-fu Climate
    ubrew12 - I think comments about arctic methane really are alarmist. see arctic methane on the move. If continental shelf hydrates were lost, then that would be problematic but I think there is any serious science to suggest this is likely? Like coalgeologist (hey I spent a lot of my life as one too), I fail to understand the obsession with MWP. Though as Rob has pointed out, the instrumental data on the same graph gives one pause to think about the rate of warming compared to past periods.
  25. Kung-fu Climate
    Just to be certain, could the base period for each anomaly be attached to each graph so that we know, rather than having to assume, that they all refer to the same benchmark.
  26. carrot eater at 12:36 PM on 6 May 2010
    Kung-fu Climate
    Credit to Loehle in that there were a number of sloppy errors in the original attempt; the corrected version is improved. Spencer Weart: I think only three of Loehle's proxies were Southern Hemisphere. From the nature of the proxies used, there's also going to be some dating error. If nothing else, Loehle's reconstruction is the people's reconstruction. The method may not be the best, but it's simple enough that anybody could do it. But beyond the issues with the amount of data and simplistic processing, is the question of exactly why these results support scepticism. Loehle's results show a bit more variability than others. Sceptics like to jump from that to various unsupported conclusions.
  27. CoalGeologist at 12:31 PM on 6 May 2010
    Kung-fu Climate
    I’m flummoxed, as ever, by the obsessive fixation AGW “skeptics” have with the MWP and LIA. Even if one concedes that certain regions of the Earth may have been episodically cooler during the LIA, or warmer during the MWP, in what manner does this negate the warming effect of anthropogenic CO2? Geologists have an expression: “The present is the key to the past”, which suggests that if we are able to understand natural processes occurring on the Earth today, we will be in a better position to understand events that occurred in the geologic past. The implication, however, is that the same or similar processes have occurred in the past as are occurring today. This is only partly true. Geologists now recognize that rare, catastrophic events are disproportionately represented in the geologic record. Many AGW “skeptics” attempt to invert this principle by stating the something like: Climate change has occurred naturally in the past; Therefore contemporary climate change might be natural as well. So far, so good, and most climate scientists would agree. The problem arises when “skeptics” commit a perversion of logic in extending this to infer, “Climate change has occurred naturally in the past, therefore present climate change must be natural also.” (I might not have represented this fairly, as the logic eludes me.) The problem is that climate scientists have looked long and hard for contemporary natural drivers other than AGHGs, and can’t find any that can adequately explain the observed warming. One contribution geologists can make to present situation is that there is no precedent in the geologic record for the sudden release of such massive quantities of CO2 into Earth’s atmosphere—certainly not during the Middle Ages. CO2 levels have been higher in the distant past than they are today; however, the sun was cooler then, or the configuration of the continents was different, etc. We are dealing with a unique set of circumstances today. Therefore, the MWP does not illuminate our understanding of contemporary warming. In both the “hockey-stick” diagram of Mann et al. and the “camel-back” diagram of Loehle, we may be seeing the intrusion of bias into the representation of the proxy temperature data. On the one hand Mann et al. may have felt justified in emphasizing the uniqueness of contemporary warming. Loehle may have felt justified in showing that the “hockey stick” may have exaggerated the steadiness of temperature over the past 2000 years by decapitating his poor camel at the base of the neck, as nicely documented in the present analysis. The important conclusion for us—here and now—is that it doesn’t matter if both diagrams were simultaneously valid and invalid. Either way, the present is NOT the key to the past, nor vice versa. It would be nice if we could just move on, but “skeptics” will not allow the poor hockey stick to rest in peace.
  28. Kung-fu Climate
    As many here already know, if the Kung Fu alarmists win incorrectly, they are chaining their children to an unnecessary 2% drop in global GDP (according to Krugman, citing other studies) this entire century. If the Kung Fu skeptics win incorrectly, they are chaining their children to a 5% drop in global GDP (again Krugman) this century. But, there's a small chance (Arctic methane) that they may actually be destroying any chance of their children's having a future. Admittedly, those odds are small, by why go there?
  29. HumanityRules at 12:16 PM on 6 May 2010
    Kung-fu Climate
    Putting aside whether the MWP was warmer or not what is the importance of the level of natural variability suggested by these records because that appears to show some significant differences on fig 3. By eye, and just to illustrate, Loehle's reconstruction (dark blue) maybe shows 1oC between the highest and lowest points. Jones and Mann 2004 (orange) is maybe 0.5oC (for the non-industrial period). What does this natural variability tell us? And what difference in natural radiative forcing, if any, is suggested by the different estimates?
  30. Rob Honeycutt at 11:38 AM on 6 May 2010
    Kung-fu Climate
    @HumanityRules... I did notify him about it. That's when he sent me the Hadley data. I'm sure he'll be here before to long with some comments.
  31. Rob Honeycutt at 11:37 AM on 6 May 2010
    Kung-fu Climate
    Correction. Loehle says 0.07C warmer. But also 0.53C warmer than (I believe) the end of his 2008 chart.
  32. HumanityRules at 11:37 AM on 6 May 2010
    Kung-fu Climate
    Rob, It does sound like dr Loehle was co-operative. Did you tell Dr Loehle you were going to post this? Or did you maybe mail him the the post and get any feedback on it? It would be great if you could encourage him to reply to this here.
  33. Rob Honeycutt at 11:36 AM on 6 May 2010
    Kung-fu Climate
    @HumanityRules... I'm sure there are camps on both sides of this and Loehle stated to me that he falls into the camp of believing it's not right. But even he does comment on this at the end of his paper and states that current temps (being 1992 for the smoothed average) are 0.7C higher than his MWP temps. I personally don't see how you can NOT at least make the attempt to concatenate the data in some meaningful way because this is the very essence of the debate about climate change. @ nautilus_mr... I just emailed the information for John to post.
  34. HumanityRules at 11:27 AM on 6 May 2010
    Kung-fu Climate
    Thanks for that Rob, Something that's been bugging me for a while is the way instrumental temperature records are pasted onto the end of these graphs. Can you just confirm that there is no issues with doing this? I don't mean your attempt just the general practice of doing this. I remember the recent post about the Mclean paper specifically critisised this sort of splicing of data sets.
    Response: The problem with the McLean paper was the way they spliced the data - they hid the splicing boundary by breaking the graph into different boxes, they used different Y-axes for the different boxes and the way the data overlapped, the splicing also hid the incline in temperature. This problematic graph was then cited by the authors as proof that humans weren't causing global warming.
  35. Kung-fu Climate
    Rob, You have achieved what many fail to do: you have done science and you have done so with a story. Essentially, you have kept the novice interested which means your message was received. Kudos to you. Alan Alda would be proud of you. Scott A. Mandia, Professor of Physical Sciences Selden, NY Global Warming: Man or Myth? My Global Warming Blog Twitter: AGW_Prof "Global Warming Fact of the Day" Facebook Group
  36. Spencer Weart at 11:19 AM on 6 May 2010
    Kung-fu Climate
    I don't have access to Loehle's paper, but I note from the abstract that he derives his result by averaging 18 series. Most such data comes from the Northern Hemisphere, so that's probably what he is mainly measuring. Fair enough, so did the original Mann hockey stick and many others. We should note, however, that there is considerable historical evidence of an ocean "see-saw" whereby when one hemisphere warms, the other one cools. The MWP may therefore not have been a global phenomenon, and indeed this is what Mann's most recent work tells us. Now here comes the kung fu move. The current situation is strikingly different, since for sure both hemispheres are warming together. The argument that we have seen something like this before, therefore, is mere speculation, since strong warmth in the S. Hemisphere in the Medieval period has not been demonstrated.
  37. nautilus_mr at 11:14 AM on 6 May 2010
    Kung-fu Climate
    John, a quick suggestion: would you mind editing the paragraph before Fig 3. to indicate which colour lines relate to which studies?
    Response: All the other reconstructions come from this Wikipedia page which includes the sources along with each colour.
  38. Where is global warming going?
    "The boring thing is that G&T are just applying traditional thermodynamics and find that the CO2 AGW theory just does not stack up." They are misinterpreting classical thermodynamics. Consult a text book. ( eg Fundamentals of Heat and Mass Transfer). This was covered well at: The imaginary second law
  39. Where is global warming going?
    suibhne #83 Please excuse my rusty chemistry, but I think you've made a fundamental error. Please correct the below if it's wrong. The IR absorption of CO2 has very little to do with the electron energy levels (except from the context of forming the bonds in the first place). The bond energy in the CO bonds in a co2 molecule is around 1500kj per mole of CO2. So in order to break the bonds of the co2 molecule you have to supply 1500kj of energy to 1 mole of co2 molecules before the bonds break, and the energy levels of the electrons come into play again. Again, my chemistry is very rusty, but this is my understanding. I really don't think that quantum effects are relevant at all in the way that you are claiming they are.
  40. A visual depiction of how much ice Greenland is losing
    notcynical (#72), Applying localization and rainfall amounts, that's a neat 'trick'! I'm putting that in my bag for later use.
  41. Doug Bostrom at 08:13 AM on 6 May 2010
    Where is global warming going?
    Suibhne, in order to say "they just don't", you must also say what they do. What do photons emitted from a cool body do when they encounter a warmer body?
  42. Where is global warming going?
    suibhne, nice reply: "they just don't". In fact they do, as already shown. P.S. review your quantum mechanics and in particular how bosons work.
  43. What causes Arctic amplification?
    slightly off the point but possibly of general interest: The European Geosciences Union annual meeting currently underway in Vienna have put some of their summary "Press release" presentations on line as webcasts. There is an interesting presentation by Peter Wadhams entitled "Arctic sea ice is in terminal retreat" available from here. The question/answers session at the end is interesting.....
  44. Where is global warming going?
    doug_bostrom In order for your assertion to be true, photons emitted from a lower temperature source must somehow be unable to interact with surfaces radiating at a higher temperature. Well they just don't. KR (78) puts it quite well. Here's my guess from Quantum Mechanics. The higher temperature energy levels will already be full from bottom up. Lower energy photons will not find any "slots" to fill and will be at something of a loose end.
  45. Where is global warming going?
    KR This is what your link led me to! To ensure top quality, review articles are by invitation only and all research papers undergo stringent refereeing. We welcome you to submit your research papers to IJMPB for publication. You say further .....If you want to claim that the last 100 years of thermodynamics, radiation equilibrium ... are wrong. Who wants to claim such nonsense. The boring thing is that G&T are just applying traditional thermodynamics and find that the CO2 AGW theory just does not stack up.
  46. Philippe Chantreau at 03:29 AM on 6 May 2010
    Rain in the Canadian High Arctic in April?
    Interesting facts Mauri. I won't hold my breath to see it reported on the "skeptic" web sites where the record February snow cover was trumpeted as some sort of proof of something or other...
  47. Doug Bostrom at 03:24 AM on 6 May 2010
    Are we too stupid?
    What sort of philosophy produces the following behavior? It was hailed as a breakthrough in the fight to cut carbon emissions. In 2007, researchers found that heavy electricity users cut their consumption after being told that they used more energy than their neighbours. Almost a million US households have since received similar feedback and have cut electricity use by an average of 2.5 per cent. But a new study has identified a wrinkle in the plan: the feedback only seems to work with liberals. Conservatives tend to ignore it. Some even respond by using more energy. The findings come from a study of over 80,000 Californian households, just under half of which received feedback on energy use. Overall, the technique worked: households who got the feedback cut electricity by around 2 per cent, say Dora Costa and Matthew Kahn at the University of California, Los Angeles. But important difference emerged when Costa and Kahn looked at the political leanings of those in the survey. Homeowners who identified themselves as Republicans cut energy use by just 0.4 per cent on average. And those Republicans who showed no practical interest in environmental causes – people who did not donate to environmental groups and did not choose to pay extra for renewable energy – even increased electricity use by 0.75 per cent. Republicans won’t be nudged into cutting home energy Why would somebody behave like that? I can understand doing nothing, but actively increasing one's electric bill as well helping to erase efficiency gains? What's up with that?
  48. Rain in the Canadian High Arctic in April?
    Sometimes an event such as the rain even here is spatially or temporally limited and of as such is an isolated weather event. If it coincides with other events spatially and temporally then it is just another measure of a broader event that is important. For example February had the 3rd highest mean snowcover extent of the last 44 years in North America according to the Rutgers Global Snow lab. The most extensive melt off of snowcover in the last 44 years has occurred in March and April. Leading to March mean snowcover extent being the 18th of 44 years, and April being the 41st highest of 44 years. That is correct going from third most to third least snowcover. This indicates a continent wide period of unusual melt conditions.
  49. michael sweet at 22:23 PM on 5 May 2010
    Rain in the Canadian High Arctic in April?
    Westwell: Perhaps your reporter in the Hawaii story should have reported on ice in the great lakes last year, since they used data from last year. There was a lot of ice in the great lakes last year. It was a La Nina year. This year, in contrast, was record lows. Last year was high for recent years, but not record highs. It is easy to cherry pick data to try to influence people who are uninformed. You will have a lot more trouble on this site where people check what you say.
  50. Rain in the Canadian High Arctic in April?
    Climate change? Global warming? Maybe it's just the weather, did anyone think of that? Lots of Ice—But No Media Coverage http://www.hawaiireporter.com/story.aspx?0b9e4b5f-5225-40c7-b775-03c822fbffc8 Catastrophic” retreat of glaciers in Spitsbergen http://wattsupwiththat.com/2010/05/02/catastrophic-retreat-of-glaciers-in-spitsbergen/

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