UPDATE: 12:55PM Dr. Mann ducks a TV station reporter who requested an interview afterwards, see below.

Steve McIntyre recently published a new graph on his website Climate Audit.

Alerted to the fact that Dr. Mann would be speaking at the OC Water Summit, I was asked to submit a question, but I could not make it there in time given the short notice. A suitable proxy, our friend Roger Sowell, was kind enough to attend and ask a question. Here’s what I sent him in way of a primer, I don’t know the actual question he asked, but we hope to have a video presentation later as I was told it was recorded.

Figure 1. Yamal Chronologies. Green – from Hantemirov _liv.rwl dataset; red- from Briffa et al 2008.

How interesting it is that the Hantemirov data in green, diverges from the CRU 2008 “Hockey Team” data in red. This is due to a larger data sample. One tree core, YAD061 is responsible for most of the difference, when a small set of tree core data is used.

This graph demonstrates how trees simply don’t show a hockey stick shape when all of the data is used.

In MBH98, your paper Dr. Mann, has a similar problem to the Briffa data. Your solution was to not use tree core data after 1960 and to splice on the instrumental temperature record to in effect “hide the decline” of the trees after 1960.

How do you respond to the charge that the tree ring data was cherry picked to show a desired result, and that Mr. McIntyre has falsified your work by showing that the premise of a hockey stick falls apart when all of the data is used?

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Roger Sowell was in the audience this morning (thank you for responding on short notice). I received this answer via text from Roger Sowell, to a question he asked:

He responded that it was Bradley as coauthor, and his (MBH98) work did not use the Briffa data. Said the decline or divergence is well known but not understood, so is being studied. Basically dodged the question; called it “specious”. He said the warming is real and he addressed all this in his book.

It was hoped that Steve McIntyre would have provided a question for submission, but there was no email response from him in time.

Roger Sowell has done some excellent work in climate skepticism, I urge readers to read his recent presentation, here’s the primer:

The following is the presentation I made on April 17, 2012, to the Southern California Section of the American Institute of Chemical Engineers (AIChE), at their monthly dinner meeting held at Long Beach, California. The title for the presentation is “What if the Warmists are Wrong? Is Catastrophic Cooling Coming? Implications.” My heartfelt thanks to Mr. Alan Benson, chair of the Southern California Section, for the invitation to speak. I also appreciate those who attended, and especially for their questions. As always, it is an honor to address AIChE members.

The presentation was approximately one hour, followed by another hour of questions and answers. The presentation is in three parts, as suggested by the title: 1) Are the Warmists Wrong? 2) Is Catastrophic Cooling Coming? and 3) Implications.

Background: this topic could easily require a week to present the many aspects and interesting details. With a mere hour at my disposal, this presentation necessarily hits only the major points. My purpose here, firstly, was to inform the audience of what has transpired in the climate science arena in part 1, primarily as to the quality of the data and the climate models. It is important to note the scarcity of agreement between the model projections and actual data. Secondly, my purpose was to present the case for imminent global cooling in part 2. Thirdly, my purpose was to describe a few of the many and serious implications for imminent global cooling in part 3, tying this in to what engineers can expect. Engineers are problem-solvers, and this presents a great many problems to solve. I also described a few of the legal ramifications of imminent global cooling.

Full presentation here, well worth bookmarking.

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UPDATE: 11:40AM I’m told via telephone that a local TV station is going to be interviewing Dr. Mann, and also Mr. Sowell due to his question. He promises more details later. Stay tuned.

UPDATE2 11:55PM: I wrote to Roger Sowell, after getting the above message, he reports Mann ducked the interview with KOCE-TV, the PBS station in Southern California. When Mann can’t even appear on warm-friendly PBS, you know he’s on the run.

On Friday, May 18, 2012, Anthony wrote:

Dear Roger, Thank you most sincerely for taking time out of your busy schedule to do this, I am in your debt. Anthony,

He replied:

My pleasure. This has been noteworthy. Dr Mann refused the interview, and according to the reporter, he was extremely rude about it. My interview went ok, I believe. Roger

I’ll post that interview if it becomes available online.

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