As I mentioned yesterday, Malcolm Hughes and/or the University of Arizona Laboratory for Tree-Ring Research had gone to the trouble of blocking my IP address from accessing their website. Thanks to the help of a couple of CA readers, I was able to circumvent the block. This is the sort of petty behavior that gives […]
Recently Keigwin’s Sargasso Sea dO18 temperature reconstructions have been mentioned in the climate public eye. Keigwin’s reconstruction famously has a warm MWP as shown below. This reconstruction uses modern dO18 measurements at Station S to calibrate two cores (with modern Station S values specifically shown in the graphic below): I observed last year that the […]
I hope that many of you have visited Pete Holzmann’s photo gallery here. If you click on each picture on this page, you get a separate “gallery”. Today, I’m going to post up a quick overview together with a few maps.
Don’t you think that someone on the Team might have been a little curious as to what bristlecone ring widths have done during the past 25 years? For this, we have the classic excuse of Michael Mann and the Team for not updating bristlecone and proxy records is that it’s not practical within the limited […]
Last fall, I discussed information sources on West Greenland ice core series, noting that the West Greenland version attributed by Juckes to Jones et al 1998 was a version that I’d not seen before. While I was looking at the proxy decisions in Juckes et al, I noticed the following intriguing rationalization: The Greenland stack […]
Many climateaudit readers will remember Mann’s “CENSORED” directory, in which Mann calculated principal components on a network that excluded bristlecone pines (which needless to say didn’t have a HS shape. Now Juckes et al introduces us to a new type of climate data: “restricted” data. The Team has introduced a novel data classification system – […]
In order to assess the 2006 anomaly in John V’s 2006 calculation reported previously, I’ve calculated a gridded anomaly for the U.S. using standard spatial smoothing software in R. This enables the calculation to be done in a few lines as explained below. I’ll also show results which reconcile most of the results to date. […]
John V has posted some graphics recently arguing that CRN1-2 yielded pretty much the same results as major temperature indices and, in some sense, vindicated these results. As Gavin Schmidt has pointed out, the U.S. is only 2% of the world’s surface; and as I’ve observed on many occasions, the statistical methodologies and data quality […]
Climate Audit 