Yesterday I described the work done to the surface station records in Hansen Step 2 in preparation for adjusting urban stations to match the trend of nearby rural stations. The basic substeps are Deciding which stations are rural and which are urban. The methodology used for most of North America differs from that applied to […]
CA reader, Nicholas, an extremely able computer analyst, has helped me with a number of problems with downloading data in compressed formats into R. One of the most annoying and heretofore unsolved problems was how to get Z files into R without having to handle them manually – a problem that I revisited recently when […]
My curiosity in the mathematics behind the homogeneity adjustment caused me to finally take a close look at Hansen Step 2. This turned out to be an incredibly torturous task. A quote from a Stephen King short story, The Jaunt, came to mind as I plowed through lines of code: “It’s eternity in there…“. However, […]
The site’s been crashing a lot lately. I’ve had to reboot it almost daily. We’re still on an old WordPress version and need to upgrade. Now that John A’s retired, the site has been on autopilot and needs a little bit of piloting. I would appreciate it if one of the regular readers with computer […]
Relatively up-to-date radiosonde data is available from the Hadley Center, tropical (20N-20S) is here. Ratpac and Angell are not up to date. The tropical troposphere has been a source of disputes recently, but I haven’t seen any discussion of up-to-date radiosonde data, [Note: Luboš has a current discussion on radiosondes.) You will recall the diagram […]
I’ve been foraging through ICOADS SST data for the past week and have a number of posts in progress. Here’s a diagram that I’m planning to do several comments on. It shows information on the provenance of ICOADS data between 1850, the start of the HadCRU SST record, and the present. It is very obvious […]
Folland has been the leading IPCC authority on bucket adjustments. Folland et al 1993 carries out a comparison from early 1980s measurements of (presumably predominantly insulated) bucket and non-bucket measurements, arguing that the difference was about 0.08 (less than 0.12-0.18 suggested in 2006 by Kent and Kaplan. They reported a puzzling situation in the Gulf […]
Climate Audit 