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 […]
In a presentation on April 7, 2009, Steven Chu uses the Graybill strip-bark bristlecone chronology (aka the Mann hockey stick) in a presentation. See page 7 here. (h/t to reader Gene). The Chu graphic even uses Mann’s overlay of temperatures, opportunistically ending at the high point of 1998. I wonder how Chu does at identifying […]
In recent discussions of Steig’s Antarctic reconstruction, one of the interesting statistical issues is how many principal components to retain. As so often with Team studies, Steig provided no principled reasoning for his selection of 3 PCs, statements about their supposed physical interpretation were untrue and, from some perspectives, the choice of 3 seems opportunistic. […]
About 2 weeks ago, I observed that the PR (Paleoclimate Reconstruction) Challengers, stung by various challenges to the non-transparency of their data and methods, had promised that, by April 2009, they would, among other things, make a website containing: – Collection of reconstruction codes, documentation, and related data. Interestingly, on April Fool’s Day itself, NOAA […]
The other series in Trouet that contributes to their NAO reconstruction is the Morocco chronology from Esper the non-Archiver. In the Scotland speleo series, we observed an awkward detrending step prior to the NAO reconstruction. In the Morocco series, there proves to be some awkward splices: a splice of two different series versions at a […]
The two proxies that carry the water in the Trouet NAO reconstruction are the Baker speleothem in Scotland and Esper’s tree ring chronology in Morocco. The briefest examination of the Scotland speleothem shows that the version used in Trouet et al had been previously adjusted through detrending from the MWP to the present. In the […]
Trouet et al was released on April 2, 2009 with an SI that did not include any data. Discussion began here on April 3 in the comments here and later that day I posted on it here observing: Unfortunately, the authors failed to provide any digital data citations (see for example AGU policies on this, […]
Jeff has made some progress on the basis that PC was applied to the AVHRR data before RegEM. See a good post here . This is obviously inconsistent with claims at realclimate.org by Gavin Schmidt and Eric Steig, but we’ve known for a while that their explanations are not accurate. This is a different exercise […]
Climate Audit 