“Right in the middle of the thing our resident genius admits to throwing out data which goes against the theory that the trees are measuring temperature. Those trees that DO correlate to temp, have some magic and unknowable property which binds them inextricably to temperature for all time. Somehow this magic also doesn’t allow them to be identified any other way than after looking at the data. Really old trees that exist prior to the temperature record are usually left unsorted. We readers of such drek, typically have no idea how many trees must be examined before a magic ‘thermometertree’ is selected because the expert scientists don’t bother to tell us. Now the sets are so predetermined that experts don’t even look at non-sanctioned data so we have a functional presort as a defacto standard. D’Aroigo may make no apologies for the statistical scatology being peddled but it doesn’t mean that it is defensible or even remotely scientific. In fact, were the ‘scientists’ to do the job correctly the rejection vs acceptance of trees during sorting IS quantifiable and can be used to statistically determine if the trees have a valid signal, but a far less biased and more scientific person than Rosanne D’Arrigo is clearly required”
So a Willis Eschenbach article at WUWT caught my attention this afternoon and cost me several hours. It is basically an average of 54 different tree ring reconstructions around the world. The sheer volume of data which went into each hockey stick and then was processed into the final hockeystick is huge. Willis demonstrated the indescribable method used to combine the data turned out to be equivalent to a simple average. The result: Hockeystick!
Graph per Willis Eschenbach — WUWT article linked above Last millennium northern hemisphere summer temperatures from tree rings:
Rob Wilson a, b, *, Kevin Anchukaitis b, c, Keith R. Briffa d, Ulf Büntgen e, g, h, Edward Cook b,
Rosanne D’Arrigo b, Nicole Davi b, i, Jan Esper j, Dave Frank e, Bj€orn Gunnarson k,
Gabi Hegerl l, Samuli Helama m, Stefan Klesse e, Paul J. Krusic f, k, Hans W. Linderholm n,
Vladimir Myglan o…
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