Blog Profile / Climate Audit

Filed Under:Issues & Causes / Climate Change
Posts on Regator:477
Posts / Week:1.4
Archived Since:December 20, 2008

Blog Post Archive

Pitfalls in climate sensitivity estimation: Part 2

A guest post by Nicholas Lewis In Part 1 I introduced the talk I gave at Ringberg 2015, explained why it focussed on estimation based on warming over the instrumental period, and covered problems relating to aerosol forcing and bias caused by the influence of the AMO. I now move on to problems arising when […]

Pitfalls in climate sensitivity estimation: Part 1

A guest post by Nicholas Lewis As many readers will be aware, I attended the WCRP Grand Challenge Workshop: Earth’s Climate Sensitivities at Schloss Ringberg in late March. Ringberg 2015 was a very interesting event, attended by many of the best known scientists involved in this field and in areas of research closely related to it – […]

Rahmstorf’s Third Trick

Rahmstorf et al 2015 Figure 5 shows a coral d15N series from offshore Nova Scotia (see left panel below). The corresponding plot from the source is shown on the right.  Original captions for both follow.  There’s enough information in the figures and captions to figure out Rahmstorf’s next trick. See if you can figure it out […]

Rahmstorf’s Second Trick

The Rahmstorf et al reconstruction commences in AD900 even though the Mann et al 2009 reconstruction goes back to AD500.  Once again, this raises the obvious question: why didn’t Rahmstorf show values before AD900?  Are these results adverse to his claims? Once the question is posed, you can guess the answer.  First, here is a slightly annotated […]

Rahmstorf’s First Trick

In any article by Mann and coauthors, it is always prudent to assume that even seemingly innocent choices use up a researcher degree of freedom – to put it nicely. For example, Rahmstorf et al focus on their “AMOC index” in the period ending 1995 and show their AMOC index up to as shown below. […]

Jones and Dixon Refute Conspiracy Theorist Lewandowsky

Jonathan Jones and Ruth Dixon have published (see Ruth’s blog here) a comment  in Psychological Science on conspiracy theorist Stephan Lewandowsky’s Hoax article, much discussed at CA at the time.  Although their statistical points are incontrovertible and clearly expressed, it took considerable persistence – see timeline here. Show More Summary

Reductio ad mannium

The new article by Rahmstorf and Mann (see RC here) has been criticized at WUWT (here here) for making claims about Atlantic Ocean currents based on proxies, rather than measurements.   But it’s worse, much worse than we thought. Rahmstorf and Mann’s results are not based on proxies for Atlantic current velocity, but on a network consisting […]

How Weaver Ignored Corcoran’s Segue

Four of the incidents in J Burke’s background chronology in Weaver v National Post (the January 27, 2005, February 15, 2005, August 2006 and February 27, 2008 incidents) relate, either in whole or in part, to a dispute between Weaver and National Post on whether Weaver had dismissed our research as “rubbish” or “balderdash” or a like […]

The implications for climate sensitivity of Bjorn Stevens’ new aerosol forcing paper

A guest post by Nicholas Lewis  In a paper published last year (Lewis & Curry 2014), discussed here, Judith Curry and I derived best estimates for equilibrium/effective climate sensitivity (ECS) and transient climate response (TCR). At 1.64°C, our estimate for ECS was below all those exhibited by CMIP5 global climate models, and at 1.33°C for […]

Weaver: “I do not lobby for more climate funding”

J Burke’s decision contains a chronology of prior interactions between Weaver and National Post, much of which, when closely examined, is highly misleading. In today’s post, I’m going to discuss one small but interesting issue: Weaver’s claim that he “did not lobby for climate funding”. J Burke referred to this when she said that Weaver […]

Another Upside-Down PAGES2K Non-Corrigendum

Kaufman and McKay recently and quietly issued an Arctic2K correction file at NOAA xls here that concedes yet another upside-down series previously pointed out to them at Climate Audit. Once again, they used information from Climate Audit without acknowledgement or credit (see NSF definition of plagiarism here). Previously, Kaufman and McKay had plagiarized Climate Audit […]

Weaver’s Next Generation Climate Model: Breaking News!!

According to the University of Victoria, Andrew Weaver says: the next generation of his climate model will address the influence of climate on human evolution—much like it’s now being used to examine the influence of humans on climate evolution”.   In breaking news, Climate Audit has obtained exclusive information on output from the first runs […]

Weaver Suggests Buddy Review for Mann et al 2005

Coauthors of Rutherford et al (J Climate 2005) (pdf) were Rutherford, Mann, Bradley, Hughes, Jones, Osborn and Briffa.  Its editor was Andrew Weaver.  It was formally submitted on Sept 16, 2003,  received two reviews in January 2004, revised and resubmitted on June 29, 2004, accepted without revision on September 27, 2004 and published in July […]

Brandon’s ebook on the Hockey Stick

  A couple of years ago, Brandon Shollenberger  wrote up a lengthy review of Mann’s Hockey Stick Wars at Lucia’s.  Brandon has fleshed out his review in an ebook here. Brandon summarized the book as follows: “there is a great deal of misinformation, and even disinformation, polluting the airwaves. One prime example was world renowned […]

Josh: Andrew, Put on your big boy pants

    Josh portrays what a sensible decision in Weaver v National Post would have looked like.

Weaver on Tortious Sarcasm towards an Academic

In 2005, serial litigant Andrew Weaver, now a politician but then an academic at University of Victoria active in public controversy, threatened Climate Audit about alleged defamatory remarks.  I asked Weaver to explain why the seemingly innocuous remarks (by John A, not myself) were supposedly defamatory. As I under it, Weaver’s explanation was that, in Canada, […]

How Mann tricked Weaver

In today’s post, I’ll show that even Andrew Weaver was tricked by Mann’s IPCC 2001 hide-the-decline. Weaver’s incorrect belief that the IPCC diagram showed “four” “independent” “hockey sticks” constructed using “different techniques” led him to believe that the research was much solider than it really was (or is), to say that our focus on the Mann […]

Andrew Weaver and the “Rhetoric of Deception”

Last year, Karl Rove was reported to have suggested that Hillary Clinton had brain damage: Karl Rove stunned a conference when he suggested Hillary Clinton may have brain damage. Onstage with Robert Gibbs and CBS correspondent and “Spies Against Armageddon” co-author Dan Raviv, Rove said Republicans should keep the Benghazi issue alive. He said if […]

Andrew Weaver: It was “defamatory” to say that he called for Pachauri Resignation

One of the more startling aspects of Andrew Weaver’s libel case was Weaver’s claim that it was defamatory in Canada to say, even in an opinion column, that Weaver had called for Pachauri’s resignation or even a change in leadership at IPCC.   It was even more startling that novice judge Emily Burke found in Weaver’s favour […]

Revkin’s Source

In Andy Revkin’s article about Pachauri’s resignation, Revkin, apparently without awareness of the irony, included the following quotation from Grist (from The Hindu in India). Some in India are also calling for Pachauri to step down from The Energy and Resources Institute (TERI), where he is currently on leave. “To safeguard the interest of global climate science […]

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