Have any of you seen any articles discussing which model runs are archived? It doesn’t appear to me that all model runs are archived. So what criteria are used to decide which model runs are archived by the modelers at PCMDI? (This is a different question than IPCC selections from the PCMDI population.) We’re all […]
Lucia did a recent post on the construction of IPCC Figure 9.5, which I’d also been looking at in light of the Santer model information but I had different issues in mind. IPCC Figure 9.5 says that they extended selected 20th century runs (the “20CEN” models) with A1B models in order to produce the graph […]
The new USHCN was scheduled to come out a couple of years ago. A paper describing it has finally appeared, discussed by Pielke Sr here. I haven’t reviewed the new paper – something that I’ll be looking for is whether they rely on “homemade” changepoint methods to supposedly achieve homogeneity – “homemade” in the sense […]
CA readers are well aware that Phil Jones of CRU has jealously refused to provide the surface temperature data set used in the prominent HadCRU temperature index, going so far as to repudiate Freedom of Information requests. Efforts to obtain this data have been chronicled here from time to time. As a result of the […]
I reported a while ago on Santer’s refusal to provide the T2 and T2LT data as collated. Despite Santer’s rude refusal, PCMDI placed the data online anyway, notifying me that this had been their plan along. I reported on this at the time, but so far haven’t reported on the collated data. The T2 and […]
For a seemingly simple topic, the calculation of trends and their confidence intervals has provoked a lot of commentary (see any number of threads at Lucia’s). Today, I’m presenting what I think is an interesting approach to the problem using maximum likelihood. In a way, the approach builds on work that I did last year […]
Jeff Id did an interesting post a few days ago on Antarctic sea ice in which he provided the following interesting graphic of Antarctic seaice area anomalies, which, from the texture, is daily, rather than monthly: Figure 1. Antarctic seaice area anomaly (Jeff Id version) Jeff’s data reference was to the following webpage at NSIDC, […]
A few years ago, I noticed some interesting presentations by geology undergraduates at the Keck Symposium – see 4 papers online here – describing fossils from the Miocene and Pliocene (both well after the Cretaceous) in the Arctic. Here’s a tree from the Pliocene – which is not “hundreds of millions” of years ago, but […]
I don’t like talking about political appointees, but Chu is supposed to be a “scientist”. If you don’t know the answer to something, it’s a good idea not to pretend that you do. Take a look at Chu’s appearance before the House Energy and Commerce Committee url (h/t reader Gene) [self-snip] Chu was there as […]
Climate Audit 