David Stockwell was intrigued by the seeming “robustness” of O&B results. There’s a reason for it: pretty much every one of the stereotyped Hockey Team proxies that are common to multiple studies are included in the O&B collation: bristlecones, Briffa’s re-processed series, Thompson’s Dunde and Guliya, Jacoby’s Mongolia. Pretty much every rascal has been gathered […]
Osborn and Briffa [2006] , published today in Science, cannot be considered as an “independent” validation of Hockey Stick climate theories, because it simply re-cycles 14 proxies, some of them very questionable, which have been repeatedly used in other “Hockey Team” studies, including, remarkably, 2 separate uses of the controversial bristlecone/foxtail tree ring data. Also […]
You’d think that there would be little left to figure out about Mann’s PC methods. I’ve been re-examining the PC1 in Mann and Jones [2003] and Jones and Mann [2004] for reasons that I’ll explain further in my next post. The data is at WDCP here but I wasn’t able to replicate this result and […]
The National Research Council of the National Academies has empanelled a blue-chip committee to study "Surface Temperature Reconstructions for the Past 1,000-2,000 Years". The chairman will be Gerald North. The request came from the House Science Committee – I presume that they are trying to assert possession over this piece of turf. 8-10 speakers are […]
What I’m going to show here is that the MBH98 method can be reduced to a few lines of code and, in doing so, show some other interesting results as well. Today I’m just going to get to the reconstructed temperature PCs, but I’ll show that these are linear in the proxies and later show […]
A recurring question which was asked again on at Eurotrib: in the Wikipedia spaghetti graph, how many of the spaghetti strands are from the Hockey Team? I guess it depends how you define the "Hockey Team". Almost exactly one year ago, I posted up the following listing http://www.climate2003.com/blog/hockey_team.htm of who I thought was on the […]
I’ve got something that’s a little bit amusing today. In MM03, we pointed out collation errors in pcproxy.txt (which I’ve recently hypothesized was used in the version of Rutherford, Mann et al [2005] submitted in July 2003 and was laundered after MM03). We pointed out that the PC series all seemed to start one year […]
Over on Warwick Hughes’ blog, a new article by Lars Kamél on the GISS adjusting temperatures for an apparent “urban cooling effect” that mysteriously happens to some small Swedish towns but not others nearby. I wonder how deep this “adjusting key data for unlikely causes” rabbit hole actually goes…
This is pretty much the one-year anniversary of our two 2005 articles in GRL and E&E. There’s a very interesting assessment of the status of the debate at Europa Tribune here. About one year ago, January 2005, an article of Steve McIntyre and Ross McKitrick was published in the Geophysical Research Letters with harsh criticism […]
There is an interesting dispute going on at Benny Peiser’s CCNet among some eminent scientists about the date of the Cretaceous/Tertiary (K/T) boundary. It’s not an issue that I’d ever thought about very much – although my 5-year old granddaughter has gotten interested in dinosaurs and asked me why they are “extincted”. (She’s the one […]
Climate Audit 
National Academies Panel on Temperature Reconstruction
The National Research Council of the National Academies has empanelled a blue-chip committee to study "Surface Temperature Reconstructions for the Past 1,000-2,000 Years". The chairman will be Gerald North. The request came from the House Science Committee – I presume that they are trying to assert possession over this piece of turf. 8-10 speakers are […]