Post-1960 values of the Briffa MXD series are deleted from the IPCC TAR multiproxy spaghetti graph. These values trend downward in the original citation (Briffa [2000], see Figure 5), where post-1960 values are shown. The effect of deleting the post-1960 values of the Briffa MXD series is to make the reconstructions more “similar”. The truncation […]
The theory of anthropogenic CO2 forcing is that outbound IR radiation is plugged up a little more in the atmosphere, causing a steeper lapse rate and warmer surface. The issue of inbound NIR water vapor absorption is that, if inbound NIR solar radiation is plugged up a little more in the atmosphere, then you would […]
A curiosity that might interest others. The tracking software for this site logs browser type. To my surprise, there are somewhat more Mozilla Firefox hits to this site than Internet Explorer. I would never have guessed. We’ll have about 50,000 hits in April. The biggest traffic days were the two days around the slashdot article […]
I might as well illustrate real-time frustrations in dealing with the Hockey Team. I’ve written back on Jacoby’s stonewalling to Climatic Change (who have been trying and who at least got a refusal from Jacoby) as follows.
Guess who recently said: "We cannot make claims as to the 1990s being the warmest decade."
I’ve been trying for over a year to get a location for the Gaspé cedars. Jacoby, as a Hockey Team member, refuses to provide such mundane information. At one point, Ed Cook, another Hockey Team member, promised to provide the information, but failed to deliver. Now Jacoby has told Climatic Change that the cedar location […]
Here is an interesting splice of Moberg and satellite data. Blue is Moberg, grey is Moberg error bars, red is instrumental, all downloaded from the Nature SI; purple is satellite. At right is the post-1850 blow-up. You can see that the post-1980 satellite temperatures are high but not off the charts relative to Moberg’s reconstruction.
Richard G. Anderson, William H. Greene, Bruce D. McCullough and H. D. Vinod have some very interesting comments in a recent Federal Reserve Bank of St Louis Working Paper about the importance of archiving data and code, in which they cite our work approvingly. Here’s a nice cut phrase that they quote: An applied economics […]
I find it difficult to believe that so many scientists have seemingly accepted the realclimate argument that Preisendorfer’s Rule N applied to a principal components calculation is somehow a substitute for proper statistical analysis. To show the goofiness of this argument, I asked a friend to compile a list of weekly closing prices for 20 […]
Briffa’s Tornetrask temperature reconstruction is done by regression analysis. Previously I reported that Briffa purported to justify his upward adjustment of 20th century MXD chronology (and downward adjustment of MWP reconstruction) by a very slight improvement of R2 (going from 0.503 to 0.553 – see Clim. Dyn 1992). I’ve attempted to replicate these regression calculations […]
Climate Audit 
"We cannot make claims as to the 1990s being the warmest decade."
Guess who recently said: "We cannot make claims as to the 1990s being the warmest decade."