I’va added a number of new categories in the frame at right and have indexed a lot of old postings. For example, I’ve indexed comments pertaining to Jones et al; Crowley; IPCC; bristlecones; geological proxies; modeling; satellite and gridcell temperatures and a few others. The format needs to be tidied a little.
It’s pretty hard to have a blog on climate issues and not comment on Hurricane Katrina and the devastation of New Orleans and Mississippi. On the other hand, most comments to date emanating from climate circles seem very tasteless and suggest any comment from someone interested in climate will be pretty risky.
In the ES&T article, Jerry Mahlman, rather than using ad hominem techniques like discussing biases in principal components methodology, spurious significance of RE statistics or the validity of bristlecone pines as temperature proxies, described us simply as "quacks". We start our consideration of the use of the technical term "quack" in climate science through the […]
One of the points made by ES&T to supposedly marginalize the Wall Street Journal article was: Although most other U.S. newspapers, with the notable exception of the New York Times, also provide minimal coverage of climate change studies in science journals, ES&T found no other newspaper that reported on the McIntyre and McKitrick article. The […]
There’s a long article in Environmental Science & Technology about the proprietor of this blog (thanks to Dano for the reference) .
Chas. has sent in a recipe for showing random walks in Excel. These sorts of things are much, much easier in R (see http://www.r-project.org for free download). I’ve posted up a little script below which generates random walks and ARMA(1,1) walks together with trend lines and t-statistics.
For the several people who’ve asked that the autocorrelation comments be collected, I’ve added a Category labelled “Spurious” in the right sidebar. When I get some time, I will update the Categories as they are a useful way of keeping track of things.
I’ve recently run across an article on changing water use efficiency in bristlecones, which pretty much put the nail in the coffin on any lingering ideas that 20th century bristlecone ring widths might be a temperature proxy. Tang et al. [1999], "The dC13 of tree rings in full-bark and strip-bark bristlecone pines in the White […]
I’ve been posting up on some fundamental articles on spurious regression, involving autocorrelated processes. Here are some illustrations of what different examples look like, with specific comment on a realclimate article.
Science has recently weighed in with an editorial in which the editor of Science, Donald Kennedy, stated that he is “outraged” by the Barton Committee inquiring into processes for due diligence and disclosure in connection with science being applied for large-scale public policy. I thought that people might be interested in an account of my […]
Climate Audit 
Von Storch and the Mighty Ducks
In the ES&T article, Jerry Mahlman, rather than using ad hominem techniques like discussing biases in principal components methodology, spurious significance of RE statistics or the validity of bristlecone pines as temperature proxies, described us simply as "quacks". We start our consideration of the use of the technical term "quack" in climate science through the […]