I have been rejected at RealClimate! My first rejection! I have not posted there in about two years although I have occasionally read some of their consensus defences when they were relevant to what I have been looking at. They have been running a Steig Corrigendum thread concurrent with ours and I have followed it [...]
Real Climate has defended Steig against a plagiarism complaint from Hu McCulloch, covered by Pielke Jr here and Jeff Id here. Hu’s original post is here and the most recent CA discussion here. Hu’s complaint is here. Note: Hu’s email to the Steig coauthors is here. Steig was not the only recipient. All Steig authors [...]
US. federal policy defines plagiarism as follows: Plagiarism is the appropriation of another person’s ideas, processes, results, or words without giving appropriate credit. Here is a discussion of the topic from Penn State, where Michael Mann of Steig et al has an appointment. In an entirely unrelated development, Steig et al have issued a corrigendum [...]
Many CA readers know a lot about regression and quite a bit about principal components, but I dare say that a much fewer number are familiar with Truncated Total Least Squares (to which the regpar parameter belongs.) We’re seeing interesting interactions between PC=k and regpar=r – and there is little, if anything, in regular statistical [...]
During the 12-hour interval that Steig deigned to permit comments on his “Tutorial” about principal components, he made the following backhanded criticism of blogger communications with him: [Response: Ryan: Unlike most of your fellow bloggers, you have been very gracious in your communications with me. They could learn something from you. I don't know how [...]
Ryan O has produced a very interesting series of Antarctic tiles by calculating Steigian trends under various settings of retained AVHRR principal components and retained Truncated Total Least Squares eigenvectors (Schneider’s “regpar”). The figure below re-arranges various trend tiles provided by Ryan in a previous comment, arranging them more or less in increasing retained AVHRR [...]
Ryan O has observed a remarkable property of the Mannian algorithm used in Steig et al’s Antarctic temperature reconstruction described in a lengthy post at Jeff Id’s here and cross-posted at Anthony’s. Source code here (the source code style BTW evidencing engineering tidiness from which we should all take heed). I’m reporting here on one [...]
Following excellent notes transferred from a comment by Ryan O, who has been doing excellent analyses of the Steigian swamp.
I noticed something interesting in AR4 about Antarctic models, that no one mentioned in the initial commentary on Steig et al. When Steig et al 2009 came out, commenters had some fun teasing the clergy over at realclimate over Spencer Weart’s article the prior year. Pielke Jr Lucia CA Speaking for myself, I went to [...]
The Jeffs have been exploring the UWisc AVHRR data which is stored as a lot of gzipped ncdf files. I couldn’t figure out how to download and open this data into R. So, as I usually do in these cases, I asked CA reader Nicholas who, as usual, has a solution. I edited this slightly [...]
