Francois O writes in: For those interested in the role of the Sun on the climate, and how reconstructions can be used to assess it, there is an interesting paper just out in JGR by Nicola Scafetta and B J West. The paper is available here. This is a continuation of their previous work. Basically […]
Pete H has uploaded some terrific Almagre panoramas online here . Pete says: Also, I’ve uploaded many of the new panoramas that provide a way to see this bristlecone forest in context. They will soon be integrated into Google Earth. Visit http://www.GigaPan.org and search for Almagre to see this work in progress Integrated into Google […]
This is something that I should write up, but others are volunteering. Pete T asked for this thread. I don’t promise to accept or use anything. WordPress formerly had a Sticky button and I used to have a Road Map post as a sticky. An old one is here . I’m increasingly using the Pages […]
Doug Nychka’s fields package in R is really excellent. Among its nice functions is a command world() that draws an outline of the continents. I wrote him today inquiring whether there was an option in which land could be colored. Unfortunately there wasn’t. However by the end of the day, there was. Doug sent me […]
I then compared verification statistics for the different reconstructions as shown below. OLS yielded much the “best” fit in the calibration period, but the worst fit in the verification period. If OLS is equivalent to ICE, it actually finds the best fit (minimizes calibration residuals), and in proxy-temperature case makes the most obvious overfit. Let […]
I’ve already received my first condescending comments from the dendro world about the mysteries of standardization. Just to pre-empt some further pontification presuming that I know nothing about these mysteries, I’m posting up some notes that I wrote in 2004 on standardization – which was what I would have been working on had people just […]
Mission Impossible Team, here’s your assignment today. Unfortunately you failed your last assignment: replicating Mann’s claimed correlations. But that probably was impossible. Today your assignment is probably possible, but is a dangerous expedition into the dark underground – into the terrifying world of Mannian RegEM. Courage and perseverance will be required. You may not return […]
You may recall the post earlier this year where the USHCN official climate station with the largest positive trend in the USA turned out to be located in a parking lot at the University of Arizona in Tucson. See below: Click picture to see image gallery at surfacestations.org The GISS surface temperature plot for Tucson: […]
A couple of days ago, I received the Almagre measurement data from the excellent dendrochronological lab at the Univesity of Guelph. I’ve posted the measurement data online in two files (as I received them): crossdated and uncrossdated. There are 41 cores that have been crossdated and 20 cores are not crossdated. These files are as […]
Judith Curry and JEG have expressed an interest in talking about Mann et al 2007, Robustness of proxy-based climate field reconstruction methods, JGR pdf. This is successor article to Mann et al, 2005, Testing the Fidelity of Methods Used in Proxy-Based Reconstructions of Past Climate, pdf. Looking past the annoying and amusing faults, here are some […]
Climate Audit 