Tag Archives: paico

The Kaufman Tautology

Oct 31, 2014 – 6:15 PM

The revised PAGES2K Arctic reconstruction used 56 proxies (down three from the original 59).  Although McKay and Kaufman 2014 didn’t mention the elephant in the room changes in their reconstruction (as discussed at CA here here), they reported with some satisfaction that “decadal-scale variability in the revised [PAGES2K] reconstruction is quite similar to that determined by Kaufman […]

By Stephen McIntyre | Posted in Uncategorized | Also tagged , , , | Comments (123)

Decomposing Paico

Oct 11, 2014 – 2:51 PM

In today’s post, Jean S and I are going to show that the paico reconstruction, as implemented in the present algorithm, is very closely approximated by a weighted average of the proxies, in which the weights are proportional to the number of measurements.  Paico is a methodology introduced in Hanhijarvi et al 2013 (pdf here) […]

By Stephen McIntyre | Posted in pages2k, Uncategorized | Also tagged , | Comments (67)

PAGES2K vs the Hanhijarvi Reconstruction

Oct 7, 2014 – 11:04 PM

The PAGES2K (2013) Arctic reconstruction of Kaufman et al has attracted considerable attention as a non-Mannian hockey stick. However, it’s been fraught with problems since day one, including a major re-statement of results in August 2014 (McKay and Kaufman, 2014 pdf), in which Kaufman conceded (without direct acknowledgement) Climate Audit criticism that their results had been […]

By Stephen McIntyre | Posted in pages2k, Uncategorized | Also tagged , , , , , , | Comments (42)