Category Archives: Yamal and Urals

Wilson on Yamal Substitution

Feb 22, 2006 – 8:50 AM

Rob Wilson has written in sharply criticizing me (Yamal Substitution #3) for a lack of a balanced presentation on the Yamal substitution, and, in particular, for not acknowledging the "clear statistical reasons (related to variance changes through time)" that he had provided me offline for why D’Arrigo et al 2006 made the Yamal substitution. Also […]

By Stephen McIntyre | Also posted in Briffa, Jacoby, Multiproxy Studies | Tagged , , , , , , | Comments (40)

More on Urals and Tornetrask

Oct 23, 2005 – 11:02 AM

I’m finally trying to finalize my presentation on Jones et al [1998] for the US GCRP workshop in November, which is necessarily mostly about the Polar Urals and Tornetrask reconstructions. Bot MXD chronologies and RW chronologies are supposed to correlate to temperature. So an obvious quesiton is how do they correlate to eachother. I’ve plotted […]

By Stephen McIntyre | Also posted in Briffa, Jones et al 1998, Multiproxy Studies | Tagged , , , | Comments (7)

Naurzbaev

Oct 5, 2005 – 11:42 AM

Naurzbaev et al [2004] is a terrific article by Naurzbaev, Hughes (yes, that Hughes) and Vaganov about deducing climate information from tree-ring growth curves in Siberia. (I find Naurzbaev’s work consistently interesting.) They studied 34 larch sites in a meridional transect from 55 to 72 N (at a longitude of about 90-100E) and 23 larch […]

By Stephen McIntyre | Also posted in Medieval, Multiproxy Studies, Proxies | Tagged , , , , | Comments (27)

Updated Polar Urals Data

Sep 26, 2005 – 2:09 PM

I have obviously been very critical of the 11th century portion of the Polar Urals dataset used in Briffa et al. [1995], without which Jones et al [1998] does not have a cold 11th century (and which is a staple of other studies). It turns out that Schweingruber collected new subfossil samples for this site […]

By Stephen McIntyre | Also posted in Briffa, Jones et al 1998, Medieval, Multiproxy Studies, Proxies | Tagged , | Comments (26)