We’ve been discussing Briffa and Yamal at CA for a couple of years and many, if not most, regular readers understand the significance of the Yamal collapse. For example, as recently as Sept 19, we were observing the dependence of the Kaufman reconstruction on the Yamal series. So the long-sought fresh information on Yamal (and […]
Category Archives: Briffa
The second image below is, in my opinion, one of the most disquieting images ever presented at Climate Audit. Two posts ago, I observed that the number of cores used in the most recent portion of the Yamal archive at CRU was implausibly low. There were only 10 cores in 1990 versus 65 cores in […]
Before continuing with Yamal, I’m going to make a little detour through the Avam-Taimyr series, the measurement data to which was also archived at the same time as the Yamal data. Taimyr, also originating in Briffa 2000, has been another staple of Team reconstructions in the past 10 years, but doesn’t have a HS pattern. […]
A few days ago, I became aware that the long-sought Yamal measurement data url had materialized at Briffa’s website – after many years of effort on my part and nearly 10 years after its original use in Briffa (2000).
The old Sodankyla church was built in 1689. Nine cores from beams at this church have been measured and archived. Briffa 2008 used one of 9 cores. Why only one of 9? Your guess is as good as mine.
I have some happier news to report from Phil Trans B, which, unlike the International Journal of Climatology, has a data policy and takes it seriously. Phil Trans B is a science journal published by the Royal Society as opposed to a climate science journal published by the Royal Meteorological Society. Last summer, I reported […]
Question One of my follow-up FOI questions on Oct 31, 2008 about the gridded Briffa et al MXD data was the following: I examined Gridbox 7(132.5E 72.5N) in more detail. It contains one series: omoloyla. The gridded series (#7) has values from 1400-1991, but the underlying omoloyla chronology at ITRDB only goes from 1496 to […]
After years of effort, the chronologies of Briffa et al 2001 were recently made public, although the date on which these became public is itself clouded in mystery. [Update - this minor mystery is clarified: it looks like the data was unlocked on Sep 9, 2008, the day after my FOI request but before my […]
We’ve noted that Briffa’s gridded MXD has high correlations to temperature, much higher than run-of-mill proxies. We’ve also noted that Mann (like Briffa) truncated this data at 1960 because of divergence. At the time that Mann et al 2008, the gridded MXD data was not available anywhere – Mann cited a webpage as follows: The […]
On Sep 9, 2008, I sent an FOI request to the University of East Anglia, requesting a copy of the MXD data set as provided to Mann et al. Today (Oct 2, 2008), I was notified that they would provide this data and, sure enough the data is now posted (Oct 2, 2008) at http://www.cru.uea.ac.uk/~timo/datapages/mxdtrw.htm […]