Post-1950s warming in region unmatched in 1,000 years

Update October 2012: The manuscript “Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium” by Joelle Gergis, Raphael Neukom, Ailie Gallant, Steven Phipps and David Karoly has been re-submitted to the Journal of Climate and is being…

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Natural records taken from tree rings, coral and ice cores helped to provide a “climate picture” for the past 1,000 years. Flickr/kendura99

Update October 2012: The manuscript “Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium” by Joelle Gergis, Raphael Neukom, Ailie Gallant, Steven Phipps and David Karoly has been re-submitted to the Journal of Climate and is being reviewed again.

It was originally put on hold after the authors identified an inconsistency between the methodology described and the methodology that was ultimately used to produce the findings.

The lead author, Professor David Karoly, told The Conversation: “The actual method … included the long-term trend in the temperatures over the period from 1920 to 1990. The manuscript describes the method as having removed the long-term trend. So there’s an inconsistency between what is written in the manuscript and the method that was actually used.

“There’s a scientific debate as to which is the best method to use – whether the long-term trend should be included in looking at the relationship between the proxy data [such as data taken from tree rings] and the observed temperatures in the period from 1920 to 1990, or whether it should be removed and you should only look at the year-to-year variations. That’s a scientific discussion we’re not sure about, and we’re looking at both in reprocessing the data. The issue, however, was that the manuscript said one method was used, and another was used.

“Now that we’ve identified this issue, we will be double- and triple-checking everything. So we won’t rush this. We expect it won’t be until the middle of July until all the data processing is completed, and we expect to submit a revised manuscript back to the journal by the end of July.”


Post-1950s warming in the Australasian region is unmatched by any climate fluctuations over the past 1,000 years, according to the first large-scale temperature reconstruction for the area.

A team of scientists led by the University of Melbourne used natural climate records to study temperatures in the region over the past millennium and compare them to climate model simulations.

Lead researcher, Dr Joelle Gergis from the University of Melbourne’s School of Earth Sciences, said the results showed there were no other warm periods in the past 1,000 years that matched the warming experienced in Australasia since 1950.

The findings of the study, published today in the Journal of Climate, will form the Australasian region’s contribution to the 5th IPCC climate change assessment report chapter on past climate.

“What we did was to compare natural records like tree rings and corals and ice cores with climate model simulations to try to find out why the climate is changing the way it is,” Dr Gergis said.

These “palaeoclimate” records, provided by decades of work by more than 30 researchers from Australia, New Zealand and around the world, were needed to calculate climate variability before direct temperature records started in 1910, she said. The research team “crunched the numbers in 3,000 different ways to ensure the results were robust.

“We looked at things such as volcanoes and solar activity and things like ocean circulation, and what we found is that the post-1950 warming cannot by explained by natural variability alone, which suggests a strong influence of greenhouse gases in the Australian region,” she said.

“Tree rings and corals and ice cores have annual laminations, so they’re responding to things like temperature and rainfall variations, season to season and year to year,” she said. “So what you can then do is compare them directly to modern instrumental temperature records, and you develop a physical relationship between, say, tree ring growth and the temperature record, and then you can take that relationship centuries back in time.

“So they’re not direct thermometer readings or anything like that. But what we do is use a range of different records and we pull out the common signal, so it’s not biased based on just one record.”

Dr Gergis said reconstructions of regional temperature not only provided a climate picture of the past but could also reduce uncertainties about future climate change.

The study is part of the PAGES (Past Global Changes) global collaboration to reconstruct the past 2,000 years of climate across every region in the world.

In the Australasian region it was “difficult to get these really finely resolved records that resolve climate on annual timescales, so we didn’t have enough high-quality data to go back 2,000 years,“ Dr Gergis explained. "But for the past 1,000 years, we felt we could say with confidence we had enough records to come up with strong and reliable results.”

Collaborators included the Climate Change Research Centre and the ARC Centre of Excellence for Climate System Science, University of New South Wales where the climate modelling was conducted.

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101 Comments sorted by

  1. David Nutzuki

    logged in via Twitter

    Voters and people it turned out had the real consensus that mattered. Climate change is dead no matter what the world of science says. CO2 fear was a tragic exaggeration and the lack of visible action from the millions in the world of science proves it beyond any doubt.
    Occupy, the leading edge of progressivism does not mention climate change in its list of demands because of the bankster carbon trading stock markets ruled by corporations. Y2Kyoto is dead.
    Meanwhile, the entire world of SCIENCE and Liberalism and journalism had allowed bank-funded and corporate-run “CARBON TRADING STOCK MARKETS” to trump 3rd world fresh water relief, starvation rescue and 3rd world education for just over 26 years of insane attempts at climate CONTROL.
    Progressives have moved forward away from the CO2 blunder and tragic exaggeration so get up to speed and follow the herd.

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    1. Ian Ashman

      Manager

      In reply to Daryl Deal

      His CAPITALS make him SPECIAL!

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    2. Ian Ashman

      Manager

      In reply to Ian Ashman

      Hey Conversation people - rather than just having 'insightful' and 'unconstructive', can we have a third button called
      'unfit to stand trial' ?

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    3. Bob Weis

      Film maker

      In reply to Ian Ashman

      Maybe we should be firm that there is no debate.

      Anyone flying in a plane leaves there flat earth ideas on the ground. 'Debating' gives oxygen to those who live from it and for it. The Merchants of Doubt.

      The general population don't get science or it's methods and should either be brought up to speed quickly and economically or spoken to as lay and not expert.

      Meanwhile time is being lost and we are already standing on a precipice.

      Of course there are those who should know better but for political and/or economic self interest pretend there is no problem. Nature will not pick out a special place for them or us.

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  2. Mike Swinbourne

    logged in via Facebook

    Cue the complete rejection of this study by Marc Hendrickx in 3... 2... 1...

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    1. Ian Ashman

      Manager

      In reply to Marc Hendrickx

      lol. Marc refers to Steve McIntyre as though he was an expert in this field (he's not). And he gives himself away as a full blown denier by saying "The pronounced Hockey Stick all to (sic) reminiscent of other studies debunked long ago." Debunked? Try replicated independently numerous times. Oh, sorry I forgot, in the denialosphere, the more something is proven, the more wrong it is...

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    2. Marc Hendrickx

      Geologist

      In reply to Ian Ashman

      Ian if you choose to be deliberately ignorant of the recent history of palaeoclimatology then I can't help you.

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    3. David Boxall

      logged in via Facebook

      In reply to Mike Swinbourne

      The parable of the blind men and the elephant comes to mind.

      In climate, we have a planet-sized elephant. We need to understand, not only the surface, but the entirety from ocean depths to the edge of space (keeping in mind influences from beyond those bounds).

      No individual can possibly know more than a tiny fragment of the whole. Climate scientists have the advantages of devoting more resources to the task and of collaborating to combine their fragments into a better picture of the whole.

      Some inevitably ignore whatever the majority may say that disagrees with their view of what should be.
      http://www.cs.princeton.edu/~rywang/berkeley/258/parable.html

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    4. John Nicol

      logged in via Facebook

      In reply to Ian Ashman

      Mike Swinburne and ian Ashman,

      Could you both please enlarge on your very interesting, intelligent and thought provoking comments, to explain how they actually contribute to this conversation.
      Thanks. Sincerly, John Nicol. jonicol18@bigpond.com

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    5. John Nicol

      logged in via Facebook

      In reply to David Boxall

      That is very true David.

      It also applies to the suggestions that an anlysis of an area of land in the tropics, which makes up 2.5% only of the surface of the elephant earth, can provide any significant claim to being a representative the whole.

      It was the use of a similar selection of limited data by the infamous Michael Mann that lead to the earlier claims of a Hockey Stick for the world. Since this has been shown not only to have used specially selected, dodgy, data, but also an algorithm…

      Read more
    6. Chris O'Neill

      Telecommunications Engineer

      In reply to John Nicol

      "the infamous Michael Mann"

      Mr Nicol, if you want to show that you're not being a hypocrite when you ask for polite discussion, then stop insulting scientists.

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    7. Ian Musgrave

      Senior lecturer in Pharmacology at University of Adelaide

      In reply to John Nicol

      "Since this has been shown not only to have used specially selected, dodgy, data, but also an algorithm to plot a "convincing" trace of temperature in what turned out to be a fraud, one has a right, I believe. to be at least cautious."

      This is not true, and you know it is not true. Why are you repeating this misinformation?

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    8. Alex Cannara

      logged in via Facebook

      In reply to Marc Hendrickx

      Marc certainly demonstrates the convenience of ignorance. Who again is paying you, Marc? You've yet to explain.

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    9. Alex Cannara

      logged in via Facebook

      In reply to John Nicol

      So John, now that your email address is exposed, and you have mine, are you ever going to respond to the comments I gave you last year on why your arguments are incorrect? Please see my comments below as well.

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    10. Alvin Stone

      logged in via Facebook

      In reply to John Nicol

      John Nicol: I imagine someone will probably do a proxy study of the entire Southern Hemisphere at some point. Would that convince you if it proved to have a similar fit to the Michael Manne plot?

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    11. David Boxall

      logged in via Facebook

      In reply to John Nicol

      John Nicol: "... suggestions that an anlysis of an area of land in the tropics, which makes up 2.5% only of the surface of the elephant earth, can provide any significant claim to being a representative the whole."
      Has anyone suggested that? Would any sane person suggest that the 2.5% should be ignored? Isn't the analysis a valuable contribution to understanding the whole?

      Are you trying to ignore whatever is said that disagrees with your view of what should be?

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    12. Ian Ashman

      Manager

      In reply to Chris O'Neill

      John Nicol = deep deep denial.

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    13. Ian Ashman

      Manager

      In reply to David Boxall

      David, it is pretty clear that John either hasn't read the paper or doesn't understand the paper. He is Plimeresque in his denial.

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    14. Ian Ashman

      Manager

      In reply to Alvin Stone

      They are doing this Alvin - the Aussies got a chunk to do, others will publish studies into different longitudes.

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    15. Ian Ashman

      Manager

      In reply to Marc Hendrickx

      deny deny deny Marc. Alex asks a good question - who is paying you? I'd actually respect you more if you were being paid by fossil fuel interests because the alternative - that you believe the nonsense you spew - means you are a dunce and worthy of nothing but contempt.

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    16. Ian Ashman

      Manager

      In reply to John Nicol

      John, why does your group promote the Heartland Group? A group proven to tell lies and distort the truth?

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    17. Alex Cannara

      logged in via Facebook

      In reply to Ian Ashman

      Ahh, but John is my age, so he's simply shifting the inevitable costs forward to offspring. Wonder what they'll think of the old geezer?
      ;]

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    18. Alex Cannara

      logged in via Facebook

      In reply to Ian Ashman

      Ian, he's an advertizing geologist -- we know who's paying him. And, his offspring, if any, will be asking the hard questions later. So, pity Marc, especially when you see him in line for federal disaster compensation.

      There are always those depending on adults being in the room.
      ;]

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    19. Alex Cannara

      logged in via Facebook

      In reply to Ian Ashman

      Yet again I must apologize for our American-Petroleum-Institute-funded Heartland twits.

      http://legalplanet.wordpress.com/2012/02/22/peter-gleick-the-heartland-institute-and-scientific-ethics/

      We also now have the American Traditions Institute, funded by the Koch boys, etc. So Nicol & Marc may be seeing some of their $ slosh down there too.

      http://www.guardian.co.uk/environment/2012/may/09/climate-change-american-tradition-insitute

      We up here definitely need an ethics enema (high colonic in LA).
      ;]
      .

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    20. John Nicol

      logged in via Facebook

      In reply to Alvin Stone

      Alvin Stone,

      It would be very interesting to see such a large analysis of temperatures over the last 1,000 years in the Southern Hemisphere, for sure. Of course I would not commit absolutely to your suggestion untill I saw the details of such a study.

      But, yes, if there were to be shown a consistent sequence of the hemisphere's temperature over that period using either a uniform grid or randomly selected locations which were sufficiently representative of the whole area, over land and sea…

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    21. John Nicol

      logged in via Facebook

      In reply to Ian Ashman

      Ian,

      I am very sorry to find that you would use this space to simply write insults. In relation to the payment received by anyone, this is a strictly personal matter and should NOT be used as a stick to belt someone over the head.

      Most if not ALL, the climatologists who most strongly promote their own take on the science of Global Warming and simply make use of super computers to provide what they suggest is evidence of the influence of carbon dioxide, are all paid by the government…

      Read more
    22. John Nicol

      logged in via Facebook

      In reply to Ian Ashman

      Ian,
      I am the Chairman of the scientific advisory group attached to the ACSC, fi that is the connection yoiu are making.

      I do not take any significant interest in the web site itself which is run by others. I am not privy to the funding or connections established by ACSC.

      Having said that, the implications for any association you may wish to paint between myself and the Hearland Institute does not bother me in the least.

      The climate units in Australia and elsewhere have been funded by…

      Read more
    23. Alex Cannara

      logged in via Facebook

      In reply to John Nicol

      John, just as in the personal communication we had last year, you play victim when someone raises the hard questions.

      Who you get paid by to write the misinformation you do here is relevant to your descendents even more than to us. Your claims about CO2 effects being unsure are known to yourself as ridiculous -- you know you've no leg to stand on re sea rise and acidification -- those are indisputable and thermally & isotopically directly related to human combustion emissions.

      It's past time you joined serious folks and started doing something productive for the people in the world who have much to lose from problems they did not cause, while you aid whoever has gain from allowing things to get worse. And you even neglect your own offspring in their future challenges that you yourself actively take hand to worsen.

      For a man of your age, playing victim to combat discovery of your culpability is shameful.

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    24. Marc Hendrickx

      Geologist

      In reply to Mike Swinbourne

      Not by me but by co-author David Karoly...Errors founds in that paper and its been withdrawn, Perhaps The Con can provide an update.
      http://climateaudit.org/2012/06/08/gergis-et-al-put-on-hold/

      Via Climate Audit:
      Dear Stephen,
      I am contacting you on behalf of all the authors of the Gergis et al (2012) study ‘Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium’
      An issue has been identified in the processing of the data used…

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    25. Alex Cannara

      logged in via Facebook

      In reply to Marc Hendrickx

      C'mon, Marc, we all make errors: "Errors founds in that paper"
      ;]

      But again, kudos for hiding in the variances of air temps and studiously avoiding discussion of what your meter stick and pH meter would tell us all, if you had nerve to use them. Or, were paid to use them. Maybe we could bid for your services for truthiness? What would be the starting Au$ to consider?

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    26. Alvin Stone

      logged in via Facebook

      In reply to Alex Cannara

      Alex, I think Marc has a point here. It appears the study is being withdrawn and that there are errors in it that have been found after the paper was released.

      As one of our researchers said when this blew up yesterday, this is a great example of the public testing of a paper and the robustness of this public process when data is publicly available. The comments on the Steve McIntyre blog on the whole really explored the science in the paper, which is really good to see as opposed to the usual rants which are aimed at climate science.

      This is exactly how science is supposed to move, with results being challenged and discussed. While it is unfortunate that the paper was published and may now have to be withdrawn, it is a great example of how how science will be challenged now and in the future.

      I will be interested to see how the reinvestigation of the method, the data and the final results goes once the scientists concerned come at this problem again.

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    27. Danderson

      logged in via Twitter

      In reply to Alvin Stone

      What a load of bollocks. It passed peer review already, this public investigation shouldn't be required to identify basic issues with the methodology as has happened here. This paper is an embarrassment.

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    28. Alex Cannara

      logged in via Facebook

      In reply to Alvin Stone

      Alvin, I heartily agree that this is the way science is to work, and not by avoiding uncomfortable data.

      And the paper is apparently being pulled, as you say, for valid criticisms, by knowledgeable folks, independent of us here.

      The problem here remains cherry picking on some folks' part on what to critique.

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  3. Michael Block

    Idler

    I'm interested in how you measured "natural variability" and if you were able to put a quantitative measure on it?

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    1. Alvin Stone

      logged in via Facebook

      In reply to Michael Block

      My understanding of this is as follows. Specifically for this research, natural variability was determined by inputting the observational the data in a climate model to get it started. The researchers then ran thousands of simulations and removed or added a multitude of natural and man-made forcings to see what would produce the closest fit to the actual observations.
      The action of man-made greenhouse gases in the models was the only variation that produced a result which matched the proxy observations.

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  4. Danderson

    logged in via Twitter

    I've been to the Pages site, Focus 2 - Regional Climate Dynamics, and can't find any reference to this. Neither here, Journal of Climate (May) http://journals.ametsoc.org/toc/clim/current

    A temperature reconstruction is described with no reconstruction shown.

    Natural climate records compared to climate model simulations. (?)

    Australia, residing in the southern hemisphere which is known to have warmed less than the north, has not seen this level of warming in 1000 years. (post 1950!).

    Any chance we can see that reconstruction?

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  5. Marc Hendrickx

    Geologist

    Lead author Joelle Gergis, kindly provided a link to a copy of the paper.

    http://www.smc.org.au/2012/05/news-briefing-1000-years-of-climate-data-confirms-australias-warming/

    While I have not yet had a chance to look through in any detail, a number of potential issues immediately arise that are worth exploring further.

    1. Geographic bias in proxy locations. Not a single proxy on the Australian Mainland! Australian continental proxies comprise just three tree ring studies from Tasmania and…

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    1. Marc Hendrickx

      Geologist

      In reply to Marc Hendrickx

      following on....

      cave sites in Australia crying out for more detailed analysis. Plenty of swamps etc.

      4. Statistical methodology. I'm sure Steve McIntyre and others will be interested in seeing how this study was put together. Will the methodology be robust enough to survive McIntyre's forensic dissection? On past experience probably not. One does hope the authors will be more forthcoming with the algorithms required to repeat their results than Michael Mann was with his Hockey Stick.

      5. Only 2 proxies that just touch on the 1000AD mark. Not much confidence there. This does not comprise a "high resolution" study, quite the opposite.

      Congrats to the authors for their hard work in getting this published. The timing seems just right for inclusion in AR5, but the real value of the work and whether it will stand up to scrutiny is yet to be realised. The pronounced Hockey Stick all to reminiscent of other studies debunked long ago.

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    2. Fred Pribac

      logged in via email @internode.on.net

      In reply to Marc Hendrickx

      Just had a read through of the entire paper. I'm seeing it from a very different perspective to yours.

      To me the paper looks measured and quite robust in it's conclusions. There is a great deal of time spent on explanation of the methodology to the point of making most of the paper quite boring.

      My take on your points:

      1. "Geographic bias in proxy locations. ..." Agreed it would be nice to have a proxy from central Australia - however the proxies are broadly distributed and include land…

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    3. Marc Hendrickx

      Geologist

      In reply to Marc Hendrickx

      From the press release presentation these comments...
      http://www.smc.org.au/wp-content/uploads/2012/05/Aus2K_AusSMC_briefing_May_2012.pdf

      "The model agrees well with the reconstruction, and accurately reproduces the late 20th century warming"

      This is not the case. If one looks at the detail the comparison shows the modelled temps consistantly below the reconstructed temperature Until about 1900. The model then climbs while the reconstructed temps stay on trend till about 1970, when they kick up. There is in fact a strong disparity between the models and the reconstructed temperatures contrary to what the author's claim. Te differences and why they are present are glossed over.

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    4. Marc Hendrickx

      Geologist

      In reply to Fred Pribac

      Fred,
      If you don't think cherry picking is a problem among recent palaeoclimate studies you need to read Andrew Montord's book, The Hockey Stick Illusion. If you read his excellent account of the Hockey stick wars you would also appreciate concerns about the free availability of data and algorithms for the purposes of repeating and verfying studies of this nature. If in any doubt see the recent to and fro between Gavin Schmidt and Steve McIntyre over recent FOI discussions about tree ring proxies…

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    5. Ian Ashman

      Manager

      In reply to Fred Pribac

      Fred, good points. If Marc bothered to refer to the 2011 paper on this topic, he would see why these sites were chosen.

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    6. Fred Pribac

      logged in via email @internode.on.net

      In reply to Marc Hendrickx

      Marc you have accused the authors of the article being discussed here of a form of scientific dishonesty without a hint of evidence. This is very poor!

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    7. Marc Hendrickx

      Geologist

      In reply to Fred Pribac

      Fred,
      Forgive me for being more than slightly cynical about the potential for observational bias and a lack of impartiality in this study. And yes this would be a form of scientific dishonesty, though the authors would be blind to it and I dare say would not be doing it intnetionally. The lead author of the study reveals a certain lack of impartiality her personal blog. It seems that someone's mind has been made up before the evidence is in.

      http://joellegergis.wordpress.com/2007/11/30/dawn

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    8. Marc Hendrickx

      Geologist

      In reply to Marc Hendrickx

      From the current paper "This proxy network showed optimal response to Australasian temperatures over the SONDJF period, and contains the austral tree ring growing season during the spring–summer months."

      So they went looking for a hockey stick and found one!

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    9. Marc Hendrickx

      Geologist

      In reply to Fred Pribac

      Fred see also this discussion at Climate Audit regarding requests to access data from the two lead authors of this study. Open access to data and methods is a corner stone of the scientific method. Seems someone missed that lesson.

      "Neukom (together with Joelle Gergis) has also published a recent survey of Southern Hemisphere proxies Neukom and Gergis 2011, one of the objectives of which was to report on the “availability” of SH proxies. Unfortunately, with the sort of blindness all too familiar from Climategate, Neukom and Gergis conflate availability of data to cronies with public availability – a situation that I am presently testing with a long-unarchived Eric Steig data set. "

      http://climateaudit.org/2012/01/19/neukom-and-the-steig-overunder/

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    10. Alvin Stone

      logged in via Facebook

      In reply to Marc Hendrickx

      Optimal Mark, not the most extreme or one that fitted any pre-conceived findings but proxies that were consistent, reliable and responsive to conditions over the 1000 year period. The proxies were selected because there was a high level of consistency over a very wide area and they were the best.

      To suggest scientists would go hunting for proxies that fitted pre-conceived notions is just another way of accusing them of scientific fraud.

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    11. Mike Hansen

      Mr

      In reply to Marc Hendrickx

      Marc says
      "The lead author of the study reveals a certain lack of impartiality her personal blog. It seems that someone's mind has been made up before the evidence is in

      Unlike Marc who runs the blog
      http://abcnewswatch.blogspot.com.au/
      where he refers to the "Klimate Kommissar" and much more in a similar vein.

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    12. Fred Pribac

      logged in via email @internode.on.net

      In reply to Marc Hendrickx

      I've looked at the blogs you have pointed to - thank you for the links.

      I'm not going to be drawn into "he said, she said" arguments on the blogosphere. I encourage people to evaluate the tenor of the blogs for themselves and, if they feel there are any valid points, to then compare with the other side of the story for themselves.

      I've also looked at the Joelle Gergis blog commentary you have pointed to and can see nothing there that is inconsistent with her scientific understandings, nothing…

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    13. Fred Pribac

      logged in via email @internode.on.net

      In reply to Marc Hendrickx

      Marc: "There is in fact a strong disparity between the models and the reconstructed temperatures contrary to what the author's claim. Te differences and why they are present are glossed over."

      No. My reading of the paper is that the principal features of the signal purportedly due to AGW are recovered by the models with the recognition that there are differences in some detail. These differences are explicitely discussed and accord well with understandings of the impact of neglect of industrial aerosols in the models used.

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    14. Marc Hendrickx

      Geologist

      In reply to Fred Pribac

      Well hats your opinion Fred, but it does'nt gel with the graph in the paper.

      The disparity between the shape of the curves at the modern end where data is better is striking.

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    15. John Nicol

      logged in via Facebook

      In reply to Ian Ashman

      Ian,

      I have not seen the 2011 paper but would like to if you could give me a pdf freference to it in full.

      However, looking at the selection from the main paper, I must say that Marc has a valid point since all of the sites are on very small land masses or close to the ocean. There may be quite a variety of different ocean and atmospheric circulations involved which could quite conceivably make major modifications to the evidence from tree rings etc. One ice core from Antartica seems a bit…

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    16. Mike Hansen

      Mr

      In reply to Marc Hendrickx

      McIntyre runs a particularly mendacious gossip blog about climate scientists designed to titillate the weak minded.

      I do not read it.

      When he or his fellow travellers publish some science let me know. I do not expect a call anytime soon.

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    17. Marc Hendrickx

      Geologist

      In reply to Mike Hansen

      What a total misrepresentation of Climate Audit.
      The list you are looking for is here...http://climateaudit.org/multiproxy-pdfs/

      So come on Mike give Steve a call! Or does leaving the comfort and safety of the echo chamber of ideas that is the SS blog cause you some trepidation? Are you afraid that you might learn something?

      Call me Anytime, anyplace, anywhere, any way
      Anytime, anyplace, anywhere, any day-ay
      http://www.youtube.com/watch?v=y6QBaZHltJw

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    18. Mike Hansen

      Mr

      In reply to Marc Hendrickx

      From **your** link
      MM Published Articles
      McIntyre and McKitrick, Energy & Environment, 2003 MM03 SI
      McIntyre and McKitrick, GRL 2005a SI
      McIntyre and McKitrick, E&E 2005b SI
      McIntyre and McKitrick 2005c, Reply to Von Storch and Zorita
      McIntyre and McKitrick 2005d, Reply to Huybers, GRL

      Ignore the junk E&E - one publication and 2 replies in 2005 - nothing in the last 7 years yet in that 7 years plenty of op eds, plenty of gossip and accusations of scientific dishonesty on his blog.

      http://www.desmogblog.com/steve-mcintyre
      http://deepclimate.org/2010/02/04/steve-mcintyre-and-ross-mckitrick-part-1-in-the-beginning/

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    19. Marc Hendrickx

      Geologist

      In reply to Mike Hansen

      Links to smears from the gutter and no attempt to deal with the science. Is that the standard response from Kookite HQ?

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    20. Fred Pribac

      logged in via email @internode.on.net

      In reply to Marc Hendrickx

      Actually I thought the fit between proxy and model remarkable! There may be some decadal signal there that the model hasn't captured but once again ... it's discussed very openly in the paper.

      It does seem to me that you have two standards of proof: an incredibly severe (basically unmeetable) one for climate scientists and a lackadaisical one for your preferred bloggers.

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    21. Ian Ashman

      Manager

      In reply to John Nicol

      John, you write a lot of words but none of them relate to the paper. Just have a crack at reading some of the papers listed and then come back and discuss things. The concepts of proxies and gridding are not difficult - even a full blown denier like you will get it eventually...

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    22. Ian Ashman

      Manager

      In reply to Alex Cannara

      Lol! Climate Audit. Even the deniers have disowned these jokers. Marc needs to update his denialist portfolio. McIntyre and McKitrick - the Bevis and Butthead of climate science...

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    23. Alex Cannara

      logged in via Facebook

      In reply to Fred Pribac

      Fred, we can note the latest satellite observations of Cyanobacterial blooms in the Southern Ocean, which is unusually large and raising sea surface temps there over 1 additional degree C.

      We're fortunate that the current sunspot maximum is mild, as it is every 90 years or so. The worldwide temp rise would have been larger this year, had the solar maximum been as strong as, say, in the Medieval Warming.

      Hope you folks get to see Venus transit the Sun on the 5th...
      http://www.spaceweather.com/

      With that, and our eclipse up here tomorrow, maybe folks like John & Marc can record some data to show we're all really cooling?
      ;]

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    24. Chris O'Neill

      Telecommunications Engineer

      In reply to Mike Hansen

      "McIntyre and McKitrick, GRL 2005a"

      GRL is lightly reviewed, so a lot of junk, including MM2005a gets through.

      "give Steve a call"

      Been there, done that. Nothing but intellectual dishonesty and its attack dogs.

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    25. Fred Pribac

      logged in via email @internode.on.net

      In reply to Alex Cannara

      Here in Tasmania it's prime viewing location I believe - the only problem we have is fairly changeable weather. Keeping our fingers crossed.

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    26. Alex Cannara

      logged in via Facebook

      In reply to Marc Hendrickx

      There goes Marc again (where's Mr. Ice Volvo?), skillfully avoiding actual science, and definitely fearing any discussion of sea rise & ocean acidification. -- you know, Marc, the things even you can measure. But don't look below, please!

      Sea rise is 8" since 1880, and knowing seawater's expansion coeff. we're able to compute global sea warming, exclusive of ice melt.

      pH has moved down 0.1 in the same period and is now just 0.1 above the point at which the base of oceanic food chains fails to be able to extract carbonate ions from seawater. Oops.

      But, Marc has set up a trust fund to cover all that, just in the very, very remote case that he just might, perhaps be wrong (or at least he's being paid enough that he doesn't care about anyone, including his offspring). You just let us know, Marc.
      ;]

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    27. Marc Hendrickx

      Geologist

      In reply to Ian Ashman

      That paper withdrawn after errors found by Steve McIntyre. This note from Co author Karoly of interest.

      Dear Stephen,
      I am contacting you on behalf of all the authors of the Gergis et al (2012) study ‘Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium’
      An issue has been identified in the processing of the data used in the study, which may affect the results. While the paper states that “both proxy climate and instrumental…

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  6. Marc Hendrickx

    Geologist

    PS Justin Norrie, I note The Conversation still has not corrected errors in the post..."Floods and heatwaves to increase across NSW". Just wondering if The Con has a corrections policy? Or like the ABC do you prefer to let your errors live on?

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  7. Daryl Deal

    retired

    Merely reinforcing the rock solid case of man made greenhouse gas forcing.

    Reality has a well known liberal bias.

    Instead of fighting science and demeaning climate scientists, we should focus on solutions.

    We really don’t need more Moncktons in this debate.

    We need people who are respectful, scientifically literate and focused on solutions.

    We need people who are not afraid of trusting in our own ingenuity to solve this problem.

    We need people who have the courage to take action now for the sake of our future generations.

    Wouldn’t that be a breath of fresh air?

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  8. Ken Swanson

    Geologist

    A challenge for David Karoly who I heard speaking about this study on ABC Radio yesterday.

    Engage with the leading skeptical scientists in a public forum to explain how the study came to these conclusions so everyone can hear them and try to understand them.

    The discussion about this article has only revealed that unless some independent moderation process is established for the public to engage with, the throwing of rocks from one side of the fence to the other will continue and the general…

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    1. Alvin Stone

      logged in via Facebook

      In reply to Ken Swanson

      Ken, I believe the moderation you are calling for is called peer review.

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    2. Ken Swanson

      Geologist

      In reply to Alvin Stone

      Alvin

      I agree, but no one believes them.

      We need to deal with the reality of the popular mood or this argument will be lost.

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    3. John Nicol

      logged in via Facebook

      In reply to Ken Swanson

      Ken Swanson,

      I agree with you entirely for the need for an ongoing forum, debate, Royal Commission or whatever to clarify the basic scientific approach to this horrendous problem.

      However, it has to date proven impossible to obtain an agreement from any one from the Australian Climate Units or CSIRO to provide people who are prepared to debate either in public, or even in private, with other scientists who do not share their views on the role of carbon dioxide in the warming of the earth…

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    4. Alex Cannara

      logged in via Facebook

      In reply to John Nicol

      This gets so intriguing when Nicol enters and grouses about "unhelpful statements"! It reminds me of when John asked me for direct discussion last year and then fell silent when he got from me clear proof that what he was saying was incorrect.

      Apparently to John, who advertizes himself as a "spectroscopist (a technician, not a scientist or engineer), any facts are "unhelpful".

      So to help you, John, why not re-engage our email exchange? You sputtered off into your own chaff without a murmur…

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    5. Ian Ashman

      Manager

      In reply to Ken Swanson

      Ken, you exemplify the problem. You don't even wait for the information to be published before you dismiss it. Normally it's polite in denier circles to at least read what is published before you throw it on the "CAGW alarmist" junk heap.

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    6. Ken Swanson

      Geologist

      In reply to Alex Cannara

      Alex
      Great links.
      Now lets get these contributions into a public forum broader than the Conversation.
      Scientists of both sides then questioned in a structured legal environment under oath and asked to state what it is their study actually says and what it does not say, free of spin and journalistic overreach. Remember Alex I said both sides.
      Scientists should then be asked directly a few recurring questions about how what they say they have found empirically affect some basic metrics like for example:
      Global Temperature
      Sea Levels
      Sea Levels
      Melting Ice Caps
      More floods
      More droughts
      I pick these simple ones as these are the metrics most used in the press daily, and which have become familiar with the public at large.
      A common framework for the public as a reference point is what is needed.
      Only then will public opinion of Climate Science improve.
      What we discuss and point score on here in this blog matters little and will do little.

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    7. Alex Cannara

      logged in via Facebook

      In reply to Ken Swanson

      Yes Ken, but getting folks who are used to fibbing to agree to be legally bound by anything is counter to their human nature -- just look at how we 'discovered' and, after killing a few thousand of our soldiers, sort of 'undiscovered' Iraqi WMDs some years back!

      One 'official' review this past month covered the state of knoledge, even including ocean acidification, which is too often skipped over. It will likley be the first truly regrettable cause of grief for a billion or so folks, and sooner…

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    8. Ken Swanson

      Geologist

      In reply to Alex Cannara

      Alex
      What do you think could be done to establish an accountability framework that the public could buy into?
      What we have now in the IPCC is no longer respected by the public and is seen to only represent one side of the argument by most.
      I just cannot see how we can advance acceptance of climate science without changing our current approach, which leaves it too open to be torn down by skeptics.

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    9. Ken Swanson

      Geologist

      In reply to Ian Ashman

      Ian
      This post is insulting.
      I have read the paper.
      I am not a denier.
      I do not appreciate your rudeness.

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    10. Chris O'Neill

      Telecommunications Engineer

      In reply to Ken Swanson

      So how is it physically possible to change the "approach", whatever that means? Climate science is a complex and technical subject. It is extremely easy to sabotage most people's understanding of it. It just requires a very small number of intellectually dishonest people who are in abundant supply.

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    11. Alex Cannara

      logged in via Facebook

      In reply to Ken Swanson

      Ken & Chris, my experience in explaining the real effects of the history & dangers of combustion emissions is to lay out some simple facts folks can easily check.

      For example, sea rise, glacier melt, including Greenland, and ocean pH. These are all available and understandable without models that make arcane assumptions or omissions. We need not develop a computer model for earth's climate & water disposition to clearly notice real changes.

      We have a wealth of land, ocean & satellite data…

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    12. Alex Cannara

      logged in via Facebook

      In reply to Ken Swanson

      Ken, there are groups who clearly have no axes to grind as parts of funded research, like IPCC -- though those folks volunteer their research results to IPCC free, unlike what Heartland, etc. do.

      Folks like 350.org make a point of teaming up with locals, like churches, Occupy... so that accurate info can get out in understandable form. I think a grass roots effort on the part of many different, unbiased organizations can do te job. One is the Unitarian Church's "Green Sanctuary" program around the country up here. But there are many others.

      The problem is getting focus on the main points and what needs to be done besides saving energy & water in homes & businesses. The green building folks often don't consider what happens outside a structure, as long as it's insulated has low-flow plumbing, etc. It takes lots of local effort to get folks to grasp what the key knobs are to turn on the spacecraft we're flying called Earth.
      ;]

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  9. Alex Cannara

    logged in via Facebook

    OMG, guessed on 1st try again which Conversation article would have Marc (with a "c") chaffing against climate research on warming.

    C'mon Marc, still awaiting your reasoning as to why sea rise has been 8 inches since 1880, or why ocean acidification has moved over half way toward plankton extinction in the last 100 years.

    Actually, still waiting for you to take the bet Monckton wisely refused, or even for you to set up the trust for your offspring to use, just in the off chance you're a wee bit wrong about human CO2 emissions not causing problems.

    Guess we'll be waiting a long time, eh Marc? But when time comes to collect compensation for floods, droughts, whatever, we'll see you near the front of the line, right? No disappointing now. Marc.
    ;]

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  10. Bob Weis

    Film maker

    I can't tell you all how dispiriting and depressing it is to come here and read all this climate denial and sophistry. Well said Alex and let us not give energy (sic) to those merchants of doubt who would make political capital and short term financial gains by denying the science.
    It is obvious that Monckton, Plymer and Carter are pushing an agenda for their different and spurious reasons but these guys are obvious. Do not feed this "debate" further.

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    1. Fred Pribac

      logged in via email @internode.on.net

      In reply to Bob Weis

      Bob: I think many of us share your frustration.

      Unfortunately, in my opinion, ignoring the trolls and blogs is probably not a good idea because the denialist rhetoric is very damaging. It has succeeded in derailing appropriate actions that should already be in place to properly mitigate and manage across the identified risks. It also besmirches many honest, dedicated and hard working people.

      It can't go unanswered.

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    2. Ian Ashman

      Manager

      In reply to Fred Pribac

      Fred, very true.

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  11. Alex Cannara

    logged in via Facebook

    Just a general FYI on more possible pollution of information spilling from our slush-fund orgs up here (Heartland, American Traditions, Koch...) perhaps making their way Down Under to your few, but sad & phony 'researchers' & 'institutes' -- http://checksandbalancesproject.files.wordpress.com/2012/05/national_pr_campaign_proposal.doc

    Not approving of wind 'farms' myself, but approving less of un-American organizations whoring for the combustion folks, it's a wonderment that we've so many with so little regard for what their moms taught them and for what their offspring will be faced with. Imagine forcing one's kids, grandkids... into your own Fool's Wager on climate, in return for the pittances these orgs dribble out to their hack 'scientists'.

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  12. Marc Hendrickx

    Geologist

    Once again a handful of bloggers raise serious questions about the validity of a piece of published work....

    http://www.bishop-hill.net/blog/2012/6/7/another-hockey-stick-broken.html

    "Sibelius's difficulties were confirmed by others, including Steve McIntyre, but perhaps most significantly, by CSIRO's Nick Stokes, who is no sort of a sceptic. Stokes agreed with Sibelius that, when detrended, the correlations for the 27 proxies used in the Gergis reconstruction were insignificant, completely…

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  13. Alex Cannara

    logged in via Facebook

    For a very recent summary of the last 24k years. via isotopic analyses of ice cores, see AAAS Science, 11 May 2012, articles on p682 & 711.
    .

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  14. Gerard Dean

    Managing Director

    This article originally troubled me because the author did not provide the name or links to Dr Gergis' paper which was published by the Journal of Climate. The only link, PAGES(Past Global Changes) only contained a brief summary and pictures of the team.

    The paper is titled "Evidence of unusual late 20th century warming from an Australasian reconstruction spanning the last millenium" by Dr Joelle Gergis et al. It was paywalled by the American Meteorological Society, however I eventually found…

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