More changes at 6 ocean stations at BAS listed here , together with a revised “credit” here. One of the 6 stations is Chatham Island, where I noticed a problem on June 13, 2008 when I was trying to replicate GISS methodology using Wellington NZ as an example. John Goetz pinned the erroneous source to BAS. A little later, we noticed that GISS had made reference a few days earlier (June 9, 2008) to manually adjusting these records, something that we wondered about at the time. GISS reported:
June 9, 2008:… some errors were noticed on http://www.antarctica.ac.uk/met/READER/temperature.html (set of stations not included in Met READER) that were not present before August 2007. We replaced those outliers with the originally reported values. Those two changes had about the same impact on the results than switching machines (in each case the 1880-2007 change was affected by 0.002°C). See graph and maps.
A few days ago, pondering Gavin Schmidt’s newly discovered zeal for correcting faulty station data, recalling our prior issues with Chatham Island, I wondered whether GISS had showed similar zeal in correcting Chatham Island and other station problems referred to in their June 9 update note. I checked Chatham Island and it hadn’t been changed – apparently Gavin the Mystery Man hadn’t spent his Super Bowl evening correcting Chatham Island records. So I notified them. They thanked me and said that they would acknowledge me, which they did.
I also wondered whether Gavin’s zeal had extended to correcting GISS’ own version of Harry had been corrected – it hadn’t. It was still uncorrected several days later. A CA reader mischievously suggested that I inform Hansen at GISS of the problem with their Harry data. I did so on Feb 4. I was copied the next day on a businesslike reply from Reto Ruedy to Hansen, explaining that Harry did not enter into GISTEMP calculations – a point that I agree with. Indeed, in my very first post on this topic, I observed that Steig used a considerable amount of data that did not meet GISTEMP quality control standards (including, as it turns out, Harry.)
Later that day, I was copied on an email from Ruedy to BAS, in which he re-transmitted an email to BAS of May 16, 2008 asking them to correct information from various stations, including Chatham Island. For some reason, BAS had never bothered making the changes requested by Reto Ruedy and, even more remarkably, Gavin hadn’t stayed up late ensuring that the BAS record was corrected.
Upon learning that NASA GISS had notified BAS of these errors on May 16, 2008, I sent BAS an email agreeing with Ruedy’s request that the records be correcting and requesting that they correct their notice to reflect NASA GISS’s priority in this matter:
For what it’s worth, I agree with this request. I also note that NASA GISS observed this problem prior to my doing so and request that you correct the notice on your page to reflect this. Regards, Steve McIntyre
Today they corrected the 6 records using NASA GISS’s information as a source. If they are using NASA GISS as a source, then it seems a little circular for NASA GISS to continue using BAS as a dset0 source, so Ruedy will have to put his thinking cap on this issue. The revised notice today credits both Reto Ruedy and myself, for pointing out the problems, but all of the errors were identified by NASA GISS.
This was an example where the identification of the Chatham Island error was truly independent. I noticed the problem in the course of analyzing data for Wellington NZ on June 13 and, at the time, was unaware of the June 9 update at GISS, which, in any event, did not mention Chatham Island. Suppose that the GISS update had said that there was a problem with Chatham Island without saying what it was, I had then consulted the station records and observed the faulty 1988 and 1989 values, which are easily observed once one knows that there’s a problem with these records, and had then rushed off a midnight email to BAS, saying the next day to GISS – if you hadn’t played “games”, then maybe you would got the “credit” with a smiley attached. Until the Gavin Affair, I couldn’t imagine such undignified behavior.