date: Mon, 15 Jan 2007 10:35:49 -0500 from: "raymond s. bradley" subject: 1990 figure to: p.jones@uea.ac.uk, mann@psu.edu Hi Phil: I've made some edits and comments on the attached. More generally, I think you need to comment on the x & y axis scales as used by later authors. For example, in the figure used originally, it went through ~1950; the figure Stefan circulated used by German schools changes the same scale to 2000, thereby deliberately ignoring the recent warming. They also change the y-axis scale, I think. And nobody ever said if the original units were in F or C! I spoke to Jack Eddy, by the way. He has lung cancer but seems to be doing OK with chemotherapy, and he sounded pretty chipper. He said he did not recall where he got his Earth Quest figure, but it may have been from Tom Webb (see Global Changes of the Past, p. 61 on) or from Lamb. There is another side to this which you don't mention --the first attempt to expand by factors of 10, different so-called "global temperatures" was in the 1975 GARP report, Understanding Climatic Change. In that, for the last 1000 years they used Lamb's eastern European winter severity index. This version then got reproduced and further mangled in several later publications, as shown in Tom's chapter. I am as guilty as the rest--I made up something from a corner of my brain on p.33 of my paleoclimatology book! But I did say schematic...! I'm not sure why people think this is such a sensitive topic (vis a vis the IPCC). Apart from the fact that they had Chris Dork Folland writing the paleo section, the first IPCC was a good starting point, and we've clearly come a long way since then. Just because people refer back to that for their own purposes (ie Wegman) does not reflect on the IPCC process as it has evolved. Any day in Vienna is OK for me. I'll be there (with Jane) from Monday-Thursday (leaving Friday am). Look forward to getting together there.... Ray Raymond S. Bradley Director, Climate System Research Center* Department of Geosciences, University of Massachusetts Morrill Science Center 611 North Pleasant Street AMHERST, MA 01003-9297 Tel: 413-545-2120 Fax: 413-545-1200 *Climate System Research Center: 413-545-0659 <[1] http://www.paleoclimate.org> Paleoclimatology Book Web Site: [2]http://www.geo.umass.edu/climate/paleo/html Publications (download .pdf files): [3]http://www.geo.umass.edu/faculty/bradley/bradleypub.html Attachment Converted: "c:\eudora\attach\ipcc1990diagram.doc"