Well, my estimate of the impact on the US temperature series was about 0.18-0.19 deg C., a little bit more than Ruedy’s 0.15 deg C. My estimate added a small negative offset going into 2000 to the positive offset of about 0.15-0.16 after 2000 – I suspect that Ruedy is not counting both parts, thereby slightly minimizing the impact. However, I think that you’ll agree that my estimate of the impact of the impact was pretty good, given that I don’t have access to their particular black box.
Needless to say, they were totally unresponsive to my request for source code. They shouldn’t be surprised if they get an FOI request. I’ll post some more after I chance to cross-check their reply.
As to the impact on NH and global data, I’ve noted long before this exchange that the non-US data in GHCN looks more problematic to me than the US data and it would be really nice if surfacestations.org starting getting some international feedback. Ruedy’s reply was copied to Hansen and to Gavin Schmidt. I’m not sure what business it is of Gavin’s other than his “private capacity” involvement in a prominent blog.
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Steve McIntyre, posted on Aug 6, 2007 at 9:19 PM, filed under NASA (Hansen), Surface Record. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Post a comment or leave