I’ve written on a number of occasions on Briffa’s Polar Urals reconstruction, which is used in nearly every multiproxy reconstruction, no doubt because of its uniquely cold MWP. It’s one of the key series in Crowley and Lowery [2000] and Jones et al [1998]; it’s not as important in MBH98-99 (which is more or less […]
I’ve commented before on the lack of independence between authors in the supposedly "independent" multiproxy studies: Mann et al [1998, 1999], Jones et al [1998], Mann and Jones [2003], Crowley and Lowery [2000], Briffa et al [2000]. I’ve mentioned in passing that the proxies themselves are not independent, but not provided lists to show the […]
One of the big selling points of Crowley and Lowery [2000] was the “non-synchroneity of temperature change”. One of the key series in showing this was Zhu [1973]. I located Zhu [1973] today. It was great fun, not least for Zhu crediting the teachings of Chairman Mao for inspiring his work. I even reminisce a […]
Let no one say that I don’t give credit where credit is due. Keith Briffa, yes Keith Briffa, has archived 13 tree ring site chronologies at WDCP: it’s only 17 years since publication and 22-24 years since collection, but who’s counting?
A little relief from Mann source code (but don’t worry, I’m not finished with it.) In my post on IPCC 1990 arising out of the controversy about the WSJ editorial, I referred to the following quote from the Executive Summary to chapter 7 (p. 200), which stated (having the Younger Dryas in mind): We conclude […]
The webcast of the April 6, 2005 presentations by Bradley, Crowley and Ammann is here. There’s lots that could be said about this presentation. I can only pick off a few points here.
I’ve just been informed that a new paper is ‘in press’ snappily called "Testing the Fidelity of Methods used in Proxy-based Reconstructions of Past Climate", by Mann M.E., Rutherford S., Wahl E., Ammann C. It is due to be published in "Journal of Climate". If anyone can get a copy of this paper, then let […]
With the recent interest taken by the House Commitee in data archiving, I’d like to review some of my past thoughts on data policy. An audience seems to be developing for these issues. First and most importantly, here is some information on U.S. federal government policy on archiving of data. There are definite and long-standing […]
Crowley’s comments to The Chronicle of Higher Education were as follows: According to Mr. Crowley, the Duke professor, he received repeated e-mail messages from Mr. McIntyre demanding data and documentation, which grew increasingly threatening. "I’m usually happy to send people some stuff," said Mr. Crowley. However, he added, "McIntyre comes back time and again. He […]
In IPCC 1995 [SAR] – An Extended Excerpt, I quoted the following key statements from IPCC 1995: Alpine glacier advance and retreat chronologies (Wigley and Kelly, 1990) suggest that in at least alpine areas, global 20th century temperatures may be warmer than any century since 1000 AD and perhaps as warm as any extended period […]
Climate Audit 
UCAR Webcast of Bradley, Crowley, Ammann – Apr 6, 2005
The webcast of the April 6, 2005 presentations by Bradley, Crowley and Ammann is here. There’s lots that could be said about this presentation. I can only pick off a few points here.