Here’s another look at Polar Urals using a “grass plot” showing cumulative ring width for individual trees against time. The trees plotted in black are from the original archive (russ021) and the ones plotted in red are form the 1998 update (russ176). This gives a little different viewpoint on variance stabilization issues. First, one of the resaons for the change in the update is simply the addition of several very large medieval trees – remember that Shiyatov said that the medieval period was especially favorable. Also you see the much increased relication in the eleventh century where I’ve argued that Briffa et al 1995 misdated 3 cores – and that their “cold” 11th century was an artifact of incorrect crossdating.