Category Archives: GISTEMP Replication

Hansen Step 2 – First Thoughts

Sep 20, 2007 – 1:55 PM

The source code for Hansen’s Step 2- the “urban adjustment” step is online. If anyone’s been able to operate the program through to Step 2, I’d be interested in some stage results for the stations discussed here. The verbal description is not clear and the code is a blizzard of old-fashioned Fortran subscripts, so it […]

By Steve McIntyre | Also posted in NASA (Hansen), Surface Record | Comments (113)

Hansen Step 1

Sep 18, 2007 – 1:39 PM

Hansen “Step 1″ which was the source of the August crossword puzzles does not occur in a crossword puzzle form in the USHCN stations that we’ve been discussing this week. The “Hansen bias” in combining scribal versions, noticed by John Goetz, does not occur in USHCN stations for two separate reasons: (1) in the USHCN […]

By Steve McIntyre | Also posted in NASA (Hansen) | Comments (34)

The Bias Method's Perfect Siberian Storm

Sep 10, 2007 – 6:42 AM

I have been spending some time (my wife would say “too much time”) examining how the Hansen Bias Method influences the temperature record. We have already observed that the Hansen method introduces an error in cases where the different versions are merely scribal variations. See http://www.climateaudit.org/?p=2019 and discussion. The cause of the error has also […]

By goirish | Also posted in NASA (Hansen), Surface Record | Comments (90)

Hansen's Station Lists

Sep 9, 2007 – 9:57 PM

The section of Hansen’s code that we’d been looking at immediately prior to the dump of relatively unannotated code was how Hansen combined scribal versions of different stations in a 2-column case – which looks to contain a material error already discussed without the benefit of source code and which is going to be examined […]

By Steve McIntyre | Also posted in NASA (Hansen), Surface Record | Comments (17)

Does Hansen’s Error “Matter”?

Aug 11, 2007 – 1:44 PM

There’s been quite a bit of publicity about Hansen’s Y2K error and the change in the U.S. leaderboard (by which 1934 is the new warmest U.S. year) in the right-wing blogosphere. In contrast, realclimate has dismissed it a triviality and the climate blogosphere is doing its best to ignore the matter entirely. My own view […]

By Steve McIntyre | Also posted in NASA (Hansen), Surface Record | Tagged , , , , | Comments (346)
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