McIntyre on Law Dome: "Osborn and the IPCC authors wanted not to show it also apparently “for obvious reasons”, a picture being worth a thousand words"

Gergis’ Two Medieval Proxies « Climate Audit

Much of the difference between the Mann and Jones 2003 and the Gergis reconstruction arises merely from the presence/absence of the Law Dome O18 series, as can be seen by comparing the Law Dome O18 series (shown below) with the Mann and Jones 2003 SH reconstruction.

Figure . Law Dome O18 record. Plotted from LD2.1yyr data set sent by email by Tas van Ommen on 2006-03-14.

If you compare the Law Dome series shown here with the Mann and Jones 2003 SH reconstruction, you can see how the Law Dome series directly affects its results. And thus why screening Law Dome out and replacing it with Oroko leads to a very different result. Although Gergis carried out an elaborate ensemble of 3000 permutations, none of these permutations included Law Dome.