Category Archives: Multiproxy Studies

Signal to Noise Ratio Estimates of Mann08 Temperature Proxy Data

Guest post by Jeff Id from The Air Vent (used by invitation) Occasionally when working on one thing long enough, you discover something unexpected that allows you to take a step forward in understanding.  At the ICCC conference, I met Steve McIntyre and took time to ask him how come Mann07 “Robustness of proxy-based climate […]

Mann and his bristlecones

Gavin Schmidt and others have claimed that the M08 usage of the Tiljander sediments didn’t ‘matter’, because they could “get’ a series that looked somewhat similar without the sediments. They’ve usually talked around the impact of the Tiljander series on the no-dendro reconstruction. But there are two pieces of information on this. A figure added […]

A Small FOI/EIR Success

As CA readers, CRU, the Met Office and a couple of other UK institutions had more or less stonewalled David Holland’s FOI requests. One of Holland’s particular interests is one that is perhaps a little appropriate/inappropriate for Easter Sunday – Caspar and the resurrected Jesus paper. Holland had tried for some years to determine exactly […]

Boulton’s Climategate Associates

Two of Boulton’s close associates at the University of Edinburgh (see Bishop Hill here – scientists hired as professors in 2007 while Boulton was a very senior professor in the same department – are Climategate correspondents. In the searchable anelegantchaos version, Hegerl gets 41 hits; Gabi 29 hits and Crowley (her husband, also an Edinburgh […]

The Boulton Hockey Stick

Following (below left) is the Hockey Stick diagram endorsed by Geoffrey Boulton, General Secretary of the Royal Society of Edinburgh, in their December 2009 (post-Climategate) Policy Advice statement Climate Change and the U.N Copenhagen Summit here. On the right is a confirmation plot from data archived in late 2009 and February 2010 by Boulton’s associate […]

Boulton Associate Archives Data

Boulton’s Hockey Team associate, Gabi Hegerl, archived the proxy versions used in Hegerl et al 2007 in February 2010 – see here ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hegerl2007/nh-temp-hegerl2007.txt . I’ve discussed this reconstruction in earlier CA posts. Boulton used Hegerl’s Hockey Stick in the Royal Society of Edinburgh submission on Copenhagen. I’ve had the proxy versions for a couple of […]

Say My Name – February Rerun

Science has published a Correction and Clarification to Kaufman et al (2009), see here. Since they only needed to correct four out of 23 proxies, there is no need to name those who pointed out errors. ;) There is a small improvement over the draft version though; congratulations Hu! We thank H. McCulloch and others […]

Yet another Upside Down Mann out

Science published today yet-another-Mann-et-al-reconstruction: Michael E. Mann, Zhihua Zhang, Scott Rutherford, Raymond S. Bradley, Malcolm K. Hughes, Drew Shindell, Caspar Ammann, Greg Faluvegi, and Fenbiao N: Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly, Science 326 (5957), 1256. [DOI: 10.1126/science.1177303]. Seems to me that Mann has re-discovered the Medieval […]

New!! Data from the Decline

For the very first time, the Climategate Letters “archived” the deleted portion of the Briffa MXD reconstruction of “Hide the Decline” fame – see here. Gavin Schmidt claimed that the decline had been “hidden in plain sight” (see here. ). This isn’t true. The post-1960 data was deleted from the archived version of this reconstruction […]

Mike’s Nature trick

So far one of the most circulated e-mails from the CRU hack is the following from Phil Jones to the original hockey stick authors – Michael Mann, Raymond Bradley, and Malcolm Hughes.

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