It is reported here that the University of Pittsburgh Research Integrity Panel concluded that Dr. Gerald Schatten didn’t intentionally fabricate data, but he committed “research misbehavior” in signing his name to Dr. Hwang Woo-suk’s work in South Korea. The panel found Schatten, as co-author with Hwang on a 2005 article in the journal Science, “did […]
We have a number of readers who are highly qualified econometricians. I think that initially they find it hard to believe the description of Hockey Team statistical practices. Martin Ringo is one such reader, who has a doctorate in "finite sample properties of a variety of feasible, generalized least squares estimators". He’s sent in the […]
In the last few days the issue of funding the BBC was recently discussed on Slashdot. There is a proposal to tax personal computers on the off-chance that they might use the BBC’s online resources and even watch streaming video rather than watch TV. I’m pretty sure that such a tax would fall foul of […]
Readers of this site are familiar with various efforts by UCAR and UCAR personnel to discredit us, ranging from the April 6, 2005 presentation in Washington by Ammann, Bradley and Crowley discussed here , the long-standing effort by Ammann and Wahl to discredit us leading to the UCAR press release of May 11, 2005, announcing […]
I’m not sure that there’s a huge demand for more linear algebra on MBH98, but here’s the rest of the proof that the NH temperature index in an MBH98-type calculation is simply a linear combination of proxies and, when only one temperature PC is reconstructed, the weights are proportional to the correlation between each proxy […]
I’ve talked recently about the phenomenon of cherry picking tree ring chronologies with upticks in the small-subset (10-20) compilations used in typical Hockey Team multiproxy studies (e.g. Jones et al 1998; Crowley and Lowery 2000, etc., most recently Osborn and Briffa, 2006; and to a slight lesser extent D’Arrigo et al, 2006 (where there was […]
The Polar Urals temperature reconstruction (Briffa et al, 1995) has been a mainstay of multiproxy studies. More data was collected at this site in 1998 (russ176), but in the two new studies (Osborn and Briffa, 2006; D’Arrigo et al., 2006), they relate their site selection to the Polar Urals, but substitute the Yamal RCS series […]
Just when you think that you’ve heard of all the possible problems with tree rings, the newest issue comes from “positive” and “negative” responders to temperature within the same site. These issues are discussed in a number of articles by various post-docs associated with Jacoby and D’Arrigo with the latter as co-authors. So in fairness […]
There’s been a relatively lively discussion at realclimate here on O&B . I’ve got a couple of thoughts for now on (1) the independence of authors and (2) differences between datasets – two issues which I’ve frequently discussed.
D’Arrigo, Wilson and Jacoby [2006] represents state-of-the-art in dendrochronology and is hot off the press. It is unique among such studies in using a considerable amount of up-to-date data and is relatively candid about its results. I’ll try to discuss it in more detail. Here I want to pick up on one issue that featured […]
Climate Audit 
BBC hypes climate modelling scare again
In the last few days the issue of funding the BBC was recently discussed on Slashdot. There is a proposal to tax personal computers on the off-chance that they might use the BBC’s online resources and even watch streaming video rather than watch TV. I’m pretty sure that such a tax would fall foul of […]