In July 2003, Tim Osborn advised Tom Crowley that there were multiple versions of Yamal (and Tornetrask) and that he needed to contact Briffa prior to using:
The other files are “tornad.rcs” and “yamal.rcs” which are RCS-standardised tree-ring width series. I would really strongly suggest that you contact Keith Briffa about exactly what these series are and what the primary reference to them should be. The reason is that there are multiple version of Tornetrask and Yamal series and the differences are certainly not insignificant!
Something that people might bear in mind before assuming that the Yamal version used for corridor standardization in Hantemirov et al 2002 would also be used for RCS standardization.
On March 31, 2006, Osborn of CRU told the editors of Science:
We did not use tree-core measurement data in our paper, only chronologies that had previously been assembled by others from core measurement data. I don’t have any core measurement data and therefore have none to give out!
Contrary to Osborn’s claim not to have any “core measurement data” for Yamal, the Climategate documents show that CRU had an extensive collection of Yamal measurement data – see the Climategate Yamal directory. [Note: this website only lists the files, but doesn’t contain the files. The files are in the original download.]
Not only did CRU actually have Yamal measurement data (which it had had since the 1990s), the CRU letters showed that CRU had funded collection of the Yamal data (at least in part).
I haven’t parsed the Yamal measurement directory yet, but have glanced at it and readers will be interested in the results when I get to them.
[Update/Jean S: FOIA files are online here: http://junkscience.com/FOIA/]