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The Kaufman Backstory
The backstory to the development of the Kaufman et al 2009 reconstruction is pretty interesting. A few years ago (after the MM criticisms of paleoclimate reconstructions), the US National Science...
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Invalid Calibration in Kaufman 2009
Darrell S. Kaufman, David P. Schneider, Nicholas P. McKay, Caspar M. Ammann, Raymond S. Bradley, Keith R. Briffa, Gifford H. Miller, Bette L. Otto-Bliesner, Jonthan T. Overpeck, and Bo M. Vinther...
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Is Kaufman 'Robust'?
A common meme in Team-world these days is that any issues or errors are minor and that none of them “matter”. As we peel back the layers of Kaufman et al, this is the first line of Team defence. The...
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Kaufman's BSi Selection
Below is a plot comparing sediment BSi (biological silica) to depth (cm) from two of Kaufman’s lakes (done by different students). I’ve shown it by depth (rather than ascribed age) since the dating of...
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Five Alaskan BSi Series
At the second meeting of Kaufman’s PIs, one of the scientists plaintively asked: But shouldn’t we aim to do a synthesis that is only lake seds (at least as first step)? This logical building block was...
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Kaufman's "Classical" Log Regression
I observed yesterday that I had been unable to replicate the archived version of Kaufman’s Hallet Lake series – something that I thought was due to a change in the archived version (since the NCDC...
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Atte Korhola: political and social playground
There is an interesting, and, in my opinion, very bold, comment (dated 9/27, here in Finnish; Google Translation) in a Finnish web journal by professor Atte Korhola entitled “Recession in Climate...
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The Kaufman Corrigendum
In a draft Corrigendum dated Oct 10, 2009 (most recently modified Oct 21, 2009), Kaufman gives what is obviously a warm and heartfelt shout-out in which they: thank those who have pointed out errors...
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Sciencemag Enforces Data Archiving
As I surmised, Science has taken a dim view of Kaufman’s failure to provide data that was supposedly “publicly available” and most of the problems have now been dealt with. There are still a couple of...
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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....
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