The webcast of the April 6, 2005 presentations by Bradley, Crowley and Ammann is here. There’s lots that could be said about this presentation. I can only pick off a few points here.
Tag Archives: ammann
I’m now completely file compatible with Wahl and Ammann. In terms of my algorithm, I had to tweak the procedure for scaling RPCs a little, but the RPCs themselves were identical. It took some patience to reconcile differing data setups. I archived results from a complete run-through from their base case a couple of days […]
As I discussed previously here, I had been able to quite accurately replicate Mann’s temperature principal components (the first 16 of which have been archived for a long time). Notwithstanding that these calculations can actually be replicated quite accurately, Wahl and Ammann calculated new reference temperature PCs using annual data on the basis that they […]
I’m progressing nicely with the process of parsing Ammann. The correlation between our AD1400 emulations of the MBH98 reconstructed PC1 is 0.9993201! See illustration below. The emulations are virtually identical up to scaling/centering. W-A do not use archived MBH temperature PCs, but re-calculate them; this appears to account for scaling differences identified so far (and […]
So far there have been 4 Comments submitted to GRL on our paper, including Wahl and Amman which is 4th in the queue, plus the WA submission to Climatic Change. Se we’re being noticed. The GRL format for a Comment is 50% of the length of the original article, with an equal length allocated to […]
Here are some first thoughts. So far I don’t see anything in W-A that affects any of our results. Indeed, I expect that W-A is going to be very positive for this debate, as the points at issue are going to be narrowed sufficiently closely that any people actually interested in the results (as opposed […]
Just got back from Washington a few minutes ago (I think that the presentations went very well) and saw this press release from Wahl and Amman. The points appear to be ones that have been posted up at realclimate before, which we’ve fully considered and, in my opinion, don’t lay a glove on our criticisms. […]
The University Corporation for Atmospheric Research (UCAR), a consortium of 68 North American research universities, sent out the invitation shown here for a Senate briefing.