Tag Archives: wahl

Letter to Climatic Change

I was asked to review the Wahl and Amman submission in May 2005 and recently posted up my review here. The first recommendation in my review was that all Wahl and Ammann remove all arguments that depended on their rejected GRL article. They didn’t and now it’s come back and should haunt them. Despite providing […]

The RE Benchmark in A&W

There’s an interesting irony in the GRL rejection of the Ammann & Wahl Comment and it will be interesting to see how this gets handled. It turns out that the A&W Climatic Change depends on their GRL submission for their test of statistical significance for the RE statistic. So even though the GRL referee thought […]

Ammann and Wahl Little Whopper Rejected

GRL has rejected the Ammann and Wahl Little Whopper (shortly after Climatic Change accepted the Big Whopper). We previously posted up our Reply to the Little Whopper here. You can see previous discussion of this by the category "Wahl and Ammann". Since the Comment is not being published, neither is the Reply. I wonder whether […]

Ammann and Wahl – July 2005 Review

I’m posting up our July 2005 review of Ammann and Wahl. The recently accepted A&W version is here. I’m posting this up for a variety of reasons. Mann relied heavily on Ammann and Wahl in his NAS panel testimony (which wasn’t even online as accepted last week) and so it’s hard to finish off the […]

Peer Reviewing Ammann and Wahl #1 – The Correspondence

Mann cited Ammann and Wahl’s recently released paper at NAS (which was not available to us in time for the NAS panel, although I’d seen and reviewed an earlier draft.) After reading it, Per said that he thought that the reviewers had done a lousy job. Now I was only a reviewer for the first […]

Ammann at AGU: If You Had One Question..

Ammann made a presentation at the same AGU session as me, spending a considerable amount of time criticizing us — though with nothing new to say that we haven’t already rebutted here and in print. There was time for one question (AGU is fanatical about schedules) and I was recognized. So here’s my question to […]

UCAR, Ammann and Wahl and GRL

Several years ago, there was a great controversy at the journal Climate Research regarding the publication of an article by Soon and Baliunas. Three editors, including Hans von Storch, felt that the peer review leading to acceptance of this article was flawed and resigned in protest. I want to compare some of these events to […]

Wahl and Ammann: Some Verification Statistics

I’m now completely file compatible with Wahl and Ammann. In terms of my algorithm, I had to tweak the procedure for scaling RPCs a little, but the RPCs themselves were identical. It took some patience to reconcile differing data setups. I archived results from a complete run-through from their base case a couple of days […]

Wahl-Ammann: More Early Returns

As I discussed previously here, I had been able to quite accurately replicate Mann’s temperature principal components (the first 16 of which have been archived for a long time). Notwithstanding that these calculations can actually be replicated quite accurately, Wahl and Ammann calculated new reference temperature PCs using annual data on the basis that they […]

Wahl and Amman: The Early Returns

I’m progressing nicely with the process of parsing Ammann. The correlation between our AD1400 emulations of the MBH98 reconstructed PC1 is 0.9993201! See illustration below. The emulations are virtually identical up to scaling/centering. W-A do not use archived MBH temperature PCs, but re-calculate them; this appears to account for scaling differences identified so far (and […]


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