Gerry North told the Washington post that the NAS panel did exactly the same thing as Phil Jones’ trick. (Dec. 1, 2009) North is talking through his hat. North:
We put the tree ring record on the graph and stuck the instrument record on for the last 50 years in exactly the way [Phil] Jones in his [leaked] email referred to as a ʻtrickʼ. We did not know of his email (it was happening at the same time and we were careful not to have any contact with the IPCC process going on at that time), and we did precisely the same thing because it was the natural thing to do
This isn’t Jones’ trick.
The “problem” arises because Briffa reconstruction goes down from 1940 to 1994 instead of up.
Jones deleted the post-1960 values of the Briffa reconstruction, replaced them with instrumental values, smoothed the spliced series (see posts by both Jean S and myself proving this) and ended up with a reconstruction that looked like an accurate reconstruction of late 20th century temperatures. He didn’t merely show a temperature series alongside a proxy reconstruction, which is what the NAS panel did.
The NAS panel had a different approach to the “problem” of the Briffa reconstruction. They simply didn’t show it.
If North is going to issue pronouncements on Jones’ trick, then he should at least know what Jones’ trick is. If he doesn’t know precisely what it was (as he obviously doesn’t), then it’s better to say nothing than to pretend that he knows what it was.