A news report says that the oldest living tree has been found on the Sweden-Norway border. The report comes from Leif Kullman, a prominent Swedish paleo-scientist. The story says: Prof Leif Kullman at Umeå University and colleagues found a cluster of around 20 spruces that are over 8,000 years old. The oldest tree, in Fulu […]
Based on my limited experience, it seems to me that journal peer reviewing faces an interesting challenge with the increased use of Supplementary Information (and I absolutely endorse detailed SI and obviously encourage even more detailed SI). In a very non-random of articles that I know inside-out (Team journal publications), my conclusion is that, in […]
Discussion of tectonic changes and climate change over long (million+) year periods. Note recent discussion by Hansen of climate change on 50 million year time frame.
Most of my previous discussion of MBH pertained to the AD1400 network. In recent discussion over at Tamino, some of the posters have stated that BCPs only matter for the AD1400 network and that everything is fine for the AD1450 and later networks, relying here on statements in Wahl and Ammann 2007. (I don’t suppose […]
In the MBH source code, they apply steps that purport to weight the temperature PCs in their regression calculations proportional to their eigenvalues. Comments on their code say: c set specified weights on data … c weights on PCs are proportional to their singular values This is one of two weighting procedures in MBH for […]
A couple of weeks ago, I said that I would document (at least for Jean S and UC) an observation about the use of squared weights in MBH98. I realize that most readers won’t be fascinated with this particular exposition, but indulge us a little since this sort of entry is actually a very useful […]
David Stockwell has an interesting post here on March 2008 temperatures, noting a divergence between NH and SH temperatures, with NH temperatures rebounding and SH temperatures continuing to cool. http://landshape.org/enm/march-2008-temperatures/
IPCC Review Editors have an extremely important function under IPCC procedures. In prior discussion of the Replies by WG1 Chapter Authors to Review Comments, we noted their unresponsiveness on issues that we were familiar with e.g. the deletion of the inconvenient post-1960 Briffa reconstruction results, the handling of the HS dispute. When the IPCC WG1 […]
Climate Audit 