date: Mon, 15 Jan 2007 10:35:49 -0500
from: "raymond s. bradley" <rbradley@geo.umass.edu>
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"

