Yesterday in Errors Matter #1, I argued that any new reconstruction now proposed by Mann et al. as a means of salvaging MBH98-type results has to also meet the representations and warranties of MBH98 used to induce widespread acceptance. I showed that the no-PC reconstruction recently proposed by Mann et al. as a way of […]
Mann et al. have responded to our criticism by claiming that the errors which we have identified “don’t matter” because they can “get” MBH-type results under several different methods, one of which is through not using any PCs. Ross and I previewed an initial reply to these arguments here and plan to issue a pdf […]
I’ve written a script in R to collate Moberg data from original sources (plus 3 collations of tree ring site chronologies which I’d done previously and 1 digitized version sent to me). This is a working document and subject to change as more information becomes available, but is posted here in case other people are […]
I can’t complain about news coverage in senior journals with a trifecta of Nature, Science and the Economist. Here’s link to the Economist article. The Science and Nature are pay-per-view, but I quoted from them here and here. While none of them are exactly throwing rose petals as we walk, neither is there a knee-jerk […]
I think that Mann et al. are on the horns of an interesting dilemma on variance scaling (and there is no injustice in this.) MàÆàⵢerg et al. [2005], following von Storch et al. [2004], argue that the use of regression-based methods in MBH98/99 result in the lesser variability in the shaft of the hockey-stick. Here […]
Quelccaya accumulation are 2 of only 14 proxies in MBH99. I think that it was the very first Mann proxy series that I posted about (circa May 2003), as the underlying data looked very strange when plotted. Hans Erren has posted up an interesting analysis which both explains the strange appearance of the series as […]
There’s a combined discusison of MM05 (GRL) and MàÆàⵢerg et al [2005] in tomorrow’s Science, together with a new spaghetti diagram that differs from the MàÆàⵢerg rendering of proxy data a few posts ago. Figure 1. Spaghetti Diagram, Kerr, Science
I wasn’t sure whether there would be any interest in these comments, although M&M is getting quite a bit of publicity right now. Yesterday this site got 1426 hits from 819 users – so I guess I’ll keep blogging for a while anyway. M&M got a couple of references in major publications this week . […]
I’ve collated public versions of Moberg data to the extent possible and have posted up some comments from a first inspection of the data, including the apparent avoiding of ice core dO18 series, prominent in Hockey Team studies. I’ll post up a script collating the data into R if anyone’s interested. Moberg doesn’t directly use […]
If you google "moberg climate" under News, you get the Nature announcement – but look at the announcement and the avatar: Past climate comes into focus but warm forecast stays put Nature.com, UK – 4 hours ago – Fluctuations in global temperature during the past millennium may have been larger and more frequent than […]
Climate Audit 
A Trifecta
I can’t complain about news coverage in senior journals with a trifecta of Nature, Science and the Economist. Here’s link to the Economist article. The Science and Nature are pay-per-view, but I quoted from them here and here. While none of them are exactly throwing rose petals as we walk, neither is there a knee-jerk […]