cc: ckfolland@meto.gov.uk, tkarl@ncdc.noaa.gov date: Sat, 11 Sep 1999 19:35:35 -0400 from: "Michael E. Mann" subject: IPCC revisions to: p.jones@uea.ac.uk, k.briffa@uea.ac.uk Dear Phil and Keith, I wanted to get your feedback on an important suggested revision of the original (0th draft) version of TAR chapter 2. We received some criticism in the initial review of the mixing of the truly "multiproxy" reconstructions (e.g., Jones et al and Mann et al) with e.g. dendro-only reconstructions (e.g. Briffa et al) in the current figure which compares Northern Hemisphere trends that we show in the chapter. We would like to show just the Mann et al (1999) and Jones et al (1998) reconstructions, along w/ the instrumental record, in the "multiproxy" section of the report, leaving discussions of reconstructions based on specific proxy types to the earlier proxy-specific sections (e.g., the dendro section) and to the general section "Was there a little Ice Age and a Medieval Warm Period" which seeks to bring all of the different pieces of evidence together. I should report that there was fairly strong support among all of the lead authors present for taking this action. But given the key role you both have in this area, I was hoping to confirm with both of you that there would be no objection to this. Please let me know what you think as soon as you have the chance. See you both in Venice? best, mike _______________________________________________________________________ Professor Michael E. Mann Department of Environmental Sciences, Clark Hall University of Virginia Charlottesville, VA 22903 _______________________________________________________________________ e-mail: mann@virginia.edu Phone: (804) 924-7770 FAX: (804) 982-2137 http://www.evsc.virginia.edu/faculty/people/mann.html