Tag Archives: briffa

A Return to Polar Urals: Wilson et al 2016

Wilson et al 2016, like D’Arrigo et al 2006, includes a ‘Polar Urals’ chronology as one of its components.  Tree ring chronologies from Polar Urals and Yamal have long been a contentious issue at Climate Audit, dating back to the earliest days (see tags Yamal, Polar Urals). Whereas the D’Arrigo et al 2006 version had one […]

Evasions and Fantasy at Real Climate

Several readers have asked me to respond to recent comments about me at Real Climate: briefly, Osborn has made one misrepresentation after another and made statements with seemingly complete indifference as to whether he has any basis for making the claims. In respect to Schmidt’s whinge, as Lucia sagely observed a couple of years ago […]

Treeline Changes and Altitude Inhomogeneity

The apparent inconsistency of ring width chronologies with analysis of changes in treeline elevation has long been an issue that I’ve urged specialists to address. Unfortunately Briffa et al 2013 failed to address the inconsistency at Polar Urals, even though they took note of an obsolete Shiyatov article on treeline changes. (More recent work by […]

Briffa Condemns Mann Reconstructions

Not in so many words, of course. However, Briffa et al 2013 took a position on the use of radially deformed tree ring cores that would prohibit the use of strip bark bristlecones in temperature reconstructions, thereby emasculating Mann’s reconstructions. And not just the Mann reconstructions, but the majority of the IPCC reconstructions used by […]

Briffa 2013

Briffa’s new paper on Yamal is online today here, together with Supplementary Information here. Yamal has been a longstanding issue at Climate Audit. The new article appears to be their long awaited response to criticism from Climate Audit (though this criticism is not referred to anywhere in the aticle.) In resisting FOI requests for their […]

Eudora and the Briffa Attachments

In March 2010, Eugene Wahl admitted to the NOAA Inspector-General that he had destroyed his email correspondence with Keith Briffa about changes to IPCC and falsely stated that “all” the emails were in the public domain. This was untrue. The attachments were not in the public domain. Not only were the attachments not in the […]

Osborn: “I don’t have any core measurement data and therefore have none to give out!”

In yesterday’s post, I discussed the inconsistency between the climate community’s desire to rebuild trust and CRU/East Anglia’s continuing refusal of FOI requests, most recently for the 2006 version of the Yamal regional chronology. The moral of that post was that providing such information – even if they didn’t “have” to – was the sort […]

Muir Russell and the Briffa Bodge

There has been some recent discussion of the Briffa bodge – an early technique to hide the decline. I had drafted a post on the topic and its handling by the Muir Russell “inquiry” in early July 2010, but did not publish the post at the time. In today’s post, I’ve slightly updated my July […]

Provenance of the Briffa File in the Jones 1998 Archive

Recently I noticed that there was an (otherwise digitally unavailable) version of the Briffa reconstruction in a second (undocumented) sheet attached (the worksheet tab denoted “Science3”) to the Jones et al 1998 archive at NCDC (see here). Using this version, I was able to replicate graphics that had hitherto been impenetrable. Although the spreadsheet itself […]

Hide the Decline: Sciencemag # 3

The day before yesterday, I reported that Briffa and Osborn (Science 1999) had not just deleted the post=1960 decline (see also CA here), but had deleted the pre-1550 portion as well – the deletions contributing to an unwarranted rhetorical impression of consistency between the reconstructions, an impression that was capitalized upon in the commentary in […]


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