I think the IPCC has overstated the case of man made global warming.
Do you, Sneak'n and Basilio, consider that the processes for compiling the IPCC summaries, as described in the example of my last post, are done in a scientific and open manner?
Written before sighting Wayne's last post, but unsurprisingly in sync with it.
Sneak'n and Basilio, you still haven't answered the question. A simple YES or NO will suffice.
Sneak'n, your response that the example I gave is only ancillary to man made global warming, misses the point. The IPCC use the same methods through many of their reports and it is not open nor scientific.
Here is another example from the same source-
"Economist Richard Tol has been taking another look at everyone's favourite mega-document, the 2007 Intergovernmental Panel on Climate Change (IPCC) report. In guest posts on blogs here and here, he argues that while one section of the report (produced by Working Group 2) "appears to have systematically overstated the negative impacts of climate change," another section (written by Working Group 3) appears to have systematically understated the costs to society associated with emissions reduction.
Click image for larger version. From p. 7 of a Dec. 2009 document issued
by the US Environmental Protection Agency (39-page PDF here)
At this juncture it's worth remembering that the IPCC's chairman, Rajendra Pachauri, has repeatedly claimed that the IPCC relies solely on peer-reviewed material to make its case. By now we know this isn't remotely true. Tol highlights passages in Chapter 11 of the Working Group 3 report that further demonstrate this.
On this page, the IPCC discusses emissions reduction studies. Tol points out that although the third paragraph cites three documents – Stern (2006), Anderson (2006) and Barker (2006a) – not one of them has been peer-reviewed. Indeed, of the seven studies mentioned in total on this page only one was published in a peer-reviewed journal. (All reference material for that chapter is listed here.)
Tol further notes that on another page, devoted to the rather important question of what effect reducing emissions might have on employment (in the US climate change policies are currently being sold to be public as job creation plans), a total of six "studies are cited to support the notion that emission reduction creates jobs. Only one of the six is peer-reviewed."
If this seems rather sloppy, Tol says it gets worse. The academic literature in this area, he says, suggests that the relationship between emissions reduction and job creation is a weak one, and that job growth only occurs in certain circumstances – namely when government policies are "smart and well-designed." If "emission permits are given away for free – as is common," he points out, "no positive impact on employment" is achieved. The IPCC report mentions none of this, however.
Tol doesn't talk about it in these blog posts, but he was an IPCC expert reviewer for this chapter. After reading the first draft, he raised a number of concerns. Below are some choice remarks appearing on pages 2-3 of the 65-page PDF of reviewer comments available here:
In a number of instances, authors mainly quote their own work. This is unworthy. In a number of instances, authors mainly quote other IPCC material. This is incestuous. The quoting of IPCC material is most pronounced in the scenario discussion, which can be summarised as "We, the IPCC, declare that all previous IPCC work is great." This is silly.
…In many places, the authors are out of their depth; the selection of papers is haphazard, the assessment superficial. I also found too many references that are simply wrong; the authors cannot have read these papers. For a supposedly expert panel, this is very serious."
In a number of instances, the draft material reads like a political manifesto rather than a scientific document. In other instances, the authors have tried to hide their political message in pseudo-scientific language. For a supposedly independent panel, this is very serious.
Part of the literature review is haphazard; it seems as if the authors have not systematically searched the literature, but simple [sic] quote a few papers that happened to lie around. Another part of the literature review is severely biased; the authors quote their own work, and that of their friends, but systematically ignore the work of many authors. This is particularly true in the presentation of model results; results are shown for a subset of models only…
I rest my case. Is it scientific? YES or NO ?????