In a previous post, I discussed, in general terms, the issue of the conflict of interest between being an IPCC reviewer and being an active protagonist in the field. Here I illustrate the problems with specific reference to MBH98, arguing that the running text of IPCC TAR made misleading claims about the MBH98 hockey stick […]
One of the important issues raised in the House Committee Letters was the potential conflict of iinterest between individuals in their capacity as IPCC authors reviewing (and even promoting) their own research. Kevin Vranes, Roger Pielke and Hans von Storch in different ways at Prometheus have all discussed the problem, with a surprising degree of […]
There’s a description of IPCC procedures for adopting reports here. There are a number of policies on "disparate views" or "different views"
In IPCC 1995 [SAR] – An Extended Excerpt, I quoted the following key statements from IPCC 1995: Alpine glacier advance and retreat chronologies (Wigley and Kelly, 1990) suggest that in at least alpine areas, global 20th century temperatures may be warmer than any century since 1000 AD and perhaps as warm as any extended period […]
As noted before, IPCC 1995 (SAR) arrived at the following important new conclusion based only on Wigley and Kelly 1990, as stated in the Chapter 3 Executive Summary: Based on the incomplete observations and paleoclimatic evidence available, it seems unlikely that global mean temperatures have increased by 1 deg C or more in a century […]
Continuing my industrious typing from old IPCC reports, here is an extended excerpt from IPCC 1995 (SAR) dealing with climate change and variability. If you recall from IPCC 1990, it left an important oustanding question as to the impossibility of attributing the portion of present warming that it is due to human influences, when the […]
In 1992, the IPCC issued a Supplementary Report to the 1990 Assessment Report, which visited some of the multiproxy topics in chapter C. Again, I’ll provide some extended excerpts:
I started off working on a commentary to the WSJ editorial. In doing so, I looked back at IPCC 1990, which is not necessarily handy for most readers, and found myself starting to quote from it so extensively that I’ve simply typed up an extended excerpt, which I’ll use as a source. I’ll make a […]
I’ve re-read section 7 of IPCC 1 [1990], which contains the graph used in the WSJ editorial. I highly recommend that everyone interested in this topic take a look at IPCC 1. First of all, here is a scan of Figure 7.1 together with the original caption. Original Caption: Figure 7.1. Schematic diagrams of global […]
Post-1960 values of the Briffa MXD series are deleted from the IPCC TAR multiproxy spaghetti graph. These values trend downward in the original citation (Briffa [2000], see Figure 5), where post-1960 values are shown. The effect of deleting the post-1960 values of the Briffa MXD series is to make the reconstructions more “similar”. The truncation […]
Climate Audit 