Yesterday’s results connecting eigenvector patterns in the Stahle SWM network to Toeplitz matrices and spatial autocorrelation were obviously pretty interesting. Needless to say, I was interested to test these ideas on out some other networks and see how they held up. There is a large literature on spatial autocorrelation and there appear to be well-known […]
Tamino, in his continuing effort to bring every one of Mann’s questionable practices back into the light of day, has stumbled into the treeline11.dat series, which he proclaims triumphally in his most recent post as having a hockey stick shape. This is none other than the notorious Gaspé cedar series, which was analyzed at length […]
Today’s post, which has a forbidding title, contains an interesting mathematical and statistical point which illuminates the controversy over how many PCs to retain. In my re-visiting the totally unknown corner of Mannian methodology – regression weights and their determination – I re-parsed the source code, finding something new and unexpected in Mannian methodology and […]
In order to illustrate a useful application of principal components, Tamino showed coordinate systems for the motion of a canoe. In the context of MBH, it would have been more instructive to show how principal components apply to tree ring networks than to canoes. In such a context,a non-Mannian centered PC1 will typically show some […]
I’m finding some benefit to having spent some time on station histories prior to my present re-visit to Mannian proxies. Digging into the handling of station histories gives some interesting perspectives on network handling that are worth considering for tree ring networks. For example, assume for a moment that North American tree ring chronologies used […]
The CA server has been a bit balky this week, so I want to see if the volume of info on unthreaded #31 (768 comments) might have something to do with it by starting a new thread to see if the issues abate. Also per John A, can I recommend that contributors to Unthreaded conversations […]
Anthony reports: Here is a link to the audio and the transcript of the radio interview I did with Glenn Beck on Monday at the International Conference on Climate Change in New York. http://www.glennbeck.com/content/articles/article/196/6727/?ck=1 For those that would like to see my slide show presented at ICCC that day, see this link: http://gallery.surfacestations.org/watts-NYC-2008/index.html UPDATE: The […]
I’ve been parsing through the NASA data set in order to evaluate the prevalence of NASA using obsolete data versions e.g. a Rurrenabaque version ending in 1989 when data is available to 2008). As I was doing so, I noticed that a surprising number (97) of NASA stations included in their inventory (http://data.giss.nasa.gov/gistemp/station_data/v2.temperature.inv.txt) appear to […]
On Feb 20, 2008, I wrote a post reviewing the provenance of various versions of an individual USHCN station (Lampasas), observing that a much more recent version was available at NOAA than at CDIAC) (the source used by NASA. I made the following recommendation: Regardless of whether these station histories “matter”, surely there’s no harm […]
Climate Audit 