Tag Archives: osborn_briffa_2006

More O.B. Confidential

Osborn and Briffa site chronologies differed from Esper site chronologies for 4 sites. Site chronologies can differ depending on the standardization method used; in order to analyze the effect, one needs to see the measurement data. Hundreds of measurement data sets have been archived at WDCP. The really weird thing is that the Hockey Team […]

O.B. Confidential

I’m up to 38 emails back and forth with Science now in trying to get data. A little more drifted in April, about which I’ll report on in a couple of posts. My most recent progress report was here One of the questions pertained to a discrepancy between the correlation between gridcell temperatures and foxtail […]

Taimyr in Esper and Osborn-Briffa

The chronologies for Taymir in Esper et al [2002] and Osborn and Briffa [2006] differ – not a whole lot but enough to be noticeable. Esper provided measurement data for Taymir, while Osborn and Briffa have refused. The letter from Science said: The other three series contain some non-identical tree-ring series derived from the same […]

The Yamal Substitution

The Polar Urals temperature reconstruction (Briffa et al, 1995) has been a mainstay of multiproxy studies. More data was collected at this site in 1998 (russ176), but in the two new studies (Osborn and Briffa, 2006; D’Arrigo et al., 2006), they relate their site selection to the Polar Urals, but substitute the Yamal RCS series […]

The Proxies of Osborn and Briffa [2006]

David Stockwell was intrigued by the seeming “robustness” of O&B results. There’s a reason for it: pretty much every one of the stereotyped Hockey Team proxies that are common to multiple studies are included in the O&B collation: bristlecones, Briffa’s re-processed series, Thompson’s Dunde and Guliya, Jacoby’s Mongolia. Pretty much every rascal has been gathered […]

Review of Osborn and Briffa [2006]

Osborn and Briffa [2006] , published today in Science, cannot be considered as an “independent” validation of Hockey Stick climate theories, because it simply re-cycles 14 proxies, some of them very questionable, which have been repeatedly used in other “Hockey Team” studies, including, remarkably, 2 separate uses of the controversial bristlecone/foxtail tree ring data. Also […]

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