Monthly Archives: February 2006

Thompson, Hardy, Hemp and the Snows of Kilimanjaro

An interesting article was published in Der Spiegel a week ago on the glaciers atop Mount Kilimanjaro, and the research into why the glaciers are melting. The article features Lonnie Thompson who has been taking cores from tropical glaciers for a long time, and publishing articles about them, without bothering to put the data into […]

Moberg Corrigendum #2

I checked the Lauritzen series sent to me a few days ago by Moberg and found more discrepancies. I originally observed a discrepancy between the figure in the source article and the figure shown in the SI to Moberg et al [2005] as shown below. The graphic in Nature ended in the 1930s, while the […]

Bloomfield's Advice to Briffa

Briffa et al [Holocene 2002] describes a procedure for estimating confidence intervals that is applied in Jones et al [2001] as well. Bloomfield (pers. comm.) is cited as a source, although it’s inconceivable that he was aware of the Briffa truncation. I don’t see how you can claim precise confidence intervals when your post-1960 completely […]

NAS News and Schedule

Here’s the appearance schedule. There are 10 presentations. Hughes and Mann each get a separate speaking slot while Ross and I are combined into one. It’s a pretty blue-chip set of speakers. We get the last speaking spot on Thursday at the end of a long day, just before cocktails. Hughes and Mann get to […]

Briffa vs Esper #2

People have been wondering why there is such difference between Polar Urals versions. In many cases, the archived Osborn and Briffa [2006] version (smoothed) is consistent with the emailed Esper et al [2002] version – but not always. It’s always worthwhile examining differences and here are a few.

Polar Urals Spaghetti Graph

I’ve got to get back to the NAS presentation and this will be my last post on Polar Urals and Yamal for a while, but it is all quite delicious. Anyway, here is a spaghetti graph of 3 Polar Urals results – including the results from Esper et al [2002] just disclosed by Science, all […]

Polar Urals: Briffa versus Esper

It’s interesting that the Hockey Team seems to be able to make spaghetti graphs of world temperature history when they can’t even arrive at a spaghetti graph for the Polar Urals. I posted up the difference between Briffa’s Yamal substitution and the updated Polar Urals ring widths. But before either one, there was Briffa’s Polar […]

Reply to Science

As noted a couple of days ago, I received a response from Science in respect to my request for data from Osborn and Briffa [2006]. They asked that the response be confidential, but pointed me to a file archived at WDCP on Feb. 9, 2006, which proved to contain, not original data, but smoothed versions […]

Moberg Corrigendum

If you look at the Category Moberg on the right frame, you’ll see discussion of frustration that I had in connection with replication of this article and, in particular, with the Lauritzen series. Yesterday, the following Corrigendum was issued: The authorship of this Letter is amended to include Stein-Erik Lauritzen. Details of the SàƒÆ’à‚ⷹlegrotta Cave […]

Polar Urals “Grass Plot”

Here’s another look at Polar Urals using a “grass plot” showing cumulative ring width for individual trees against time. The trees plotted in black are from the original archive (russ021) and the ones plotted in red are form the 1998 update (russ176). This gives a little different viewpoint on variance stabilization issues. First, one of […]