Tag Archives: trick

The Trick

For the benefit of new readers, we discussed some aspects of the “trick” at Climate Audit in the past. Obviously, the Climategate Letters clarify many things that were murky in the past. On the left is a blowup of IPCC 2001 Fig 2.21 showing where the Briffa reconstruction (green) ends. More on this below.

IPCC: “Inappropriate” to show the decline

One reviewer of the IPCC 2007 Assessment Report specifically asked IPCC not to hide the decline. The reviewer stated very clearly: Show the Briffa et al reconstruction through to its end; don’t stop in 1960. Then comment and deal with the “divergence problem” if you need to. Don’t cover up the divergence by truncating this […]

New!! Data from the Decline

For the very first time, the Climategate Letters “archived” the deleted portion of the Briffa MXD reconstruction of “Hide the Decline” fame – see here. Gavin Schmidt claimed that the decline had been “hidden in plain sight” (see here. ). This isn’t true. The post-1960 data was deleted from the archived version of this reconstruction […]

Mike’s Nature trick

So far one of the most circulated e-mails from the CRU hack is the following from Phil Jones to the original hockey stick authors – Michael Mann, Raymond Bradley, and Malcolm Hughes.

IPCC Review Editor Comments

David Holland has written in raising an excellent point about the failure of IPCC WG1 to release the Review Editor comments. In our examination of specific issues e.g. the Briffa truncation, the handling of trends, etc., the Author Responses (online through an earlier CA initiative) show that the IPCC authors often made unconvincing and tendentious […]

IPCC and the Briffa Deletions

I’ve posted on several occasions on the deletion of the “inconvenient” section of the Briffa reconstruction. Now that the review comments are online, I want to reprise this, just so you can understand the IPCC process a little better. This repeats some earlier material. As an IPCC reviewer, I Show the Briffa et al reconstruction […]

How IPCC AR4 authors defended the Briffa data deletions

I recently received a copy of how IPCC authors answered the review comments, including their answers to the requirement of one reviewer that the deleted Briffa data be restored (and an explanation given for the inconvenient bits.) You may recall the observation of one reader in the discussion of Swindle, the reader observing: If a […]

Swindle and the IPCC TAR Spaghetti Graph

Our text for today remains: If a practising scientist selected a 1987 data set over more recent versions, failed to cite it correctly, altered the appearance of the data without a clear explanation and didn’t include the data from the last 20 years then I think we’d all be asking serious questions about their professionalism. […]

Replicating the Briffa et al 2001 MXD Reconstruction

Paul H made the following statement in the context of the Swindle discussion: If a practising scientist selected a 1987 data set over more recent versions, failed to cite it correctly, altered the appearance of the data without a clear explanation and didn’t include the data from the last 20 years then I think we’d […]

The Maestro is in da house

As I re-examined the IPCC TAR spaghetti , I noted that there was considerable evidence in Figure 2-21 that the Maestro himself is in the house and we should therefore be prepared for the unexpected. There is an interesting replication problem in the TAR spaghetti graph where I’d welcome ideas. Here’s the TAR spaghetti graph […]

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