This is a very pretty example, though the problem is endemic as Mann et al 2008 uses Mannomatic methods for industrial strength voodoo correlations. This one came up from trying to replicate Mannian confidence intervals from original data – an effort which promptly foundered because my CPS emulation, which, after much effort, finally worked on […]
Anthony has a post reporting NOAA’s 2008 results, with NOAA reporting: For 2008, the average temperature of 53.0 degrees F was 0.2 degree above the 20th Century average. Anthony showed the following image from NOAA: Readers need to keep in mind that there is a substantial “divergence” between NOAA US and NASA US temperatures as […]
Ex post selection based on correlation has been a long-standing issue at this blog (and has been independently discussed at other blogs from time to time – Luboš, Jeff Id and David Stockwell have all written on it independently. The issue came back into focus with Mann 2008, in which there is industrial strength correlation […]
Both Luboš and David Stockwell have drawn attention today to the distribution of digits in Hansen’s GISS, suggesting that the distribution is, to borrow an expression, a fingerprint of anthropogenic impact on the calculations. I disagree with both Luboš and David and don’t see anything remarkable in the distribution of digits. I don’t disagree with […]
Lucia has an interesting post on how GISS Model E deals with heat from viscous dissipation here. This is an excellent and technical discussion of a specific modeling issue. It is precisely the sort of discussion that I think is instructive and useful in this field: a specific issue about a specific model. If the […]
Mannian confidence intervals have always been a mystery with MBH99 confidence interval methodology remaining an intractable mystery that has defeated all reverse engineering (and engineering) efforts by UC, Jean S and myself to date (though we haven’t picked up this file for a while.) I was very interested to see how Mann 2008 calculated confidence […]
Note: I’m having trouble publishing new posts at WUWT, so since it has been awhile since I posted at CA, I thought I’d share this puzzle with CA readers while I wait for the issue to be resolved. – Anthony A simple question; what is that red dot on the map? I was looking at […]
Most of you are aware of the voting right now for the 2008 Weblog Awards. Anthony is winning handily; Climate Audit is also doing well, running a strong third. (2008 Logo on right leads to vote.) Anthony is a friend of mine and I’m very pleased on his behalf, though, truth be told, I’d be […]
I had a pleasant interview yesterday afternoon with Tom Yulsman of the Center for Environmental Journalism in Colorado. He also posted an article yesterday reporting on an interview with Roger Pielke Jr in which Yulsman described me as a “gadfly”. I don’t know whether this was posted before or after our interview; he didn’t mention […]
While Steve is a little “under the weather” (it must be all the snow that Al Gore sent him), I thought I’d mention an interesting article in the New York Times which sings the praises of the programming language R. R is similar to other programming languages, like C, Java and Perl, in that it […]
Climate Audit 