cc: Keith Briffa , Eystein Jansen date: Wed, 19 Apr 2006 13:01:02 -0600 from: Jonathan Overpeck subject: Update on review of IPCC SOD to: Henry Pollack Hi Henry - just got an update, and it looks like we WILL be able to ask all CA's (i.e., you) to be official expert reviewers of our Chap 6 SOD. You'll be getting an invite from the TSU (HQ) soon. Thanks in advance for your time on this important task. Best, peck >Hi Keith (and Peck and Eystein), > >I have recently been sent the current draft of the IPCC FAR by the US >Global Change Research Program, asking for comments on the draft. This >is the first time I have seen this product since we were feverishly >exchanging e-mails in February. Let me call to your attention some >small but not insignificant corrections to be made to the next draft. > >Page 6-33, Section 6.6.1.2, line 22. The title of this section (in >italics) should be changed to "What do ground surface temperature >reconstructions derived from subsurface temperature measurements tell >us?" > >Page 6-33, lines 49 and 52, there is a reference (Smerdon et al., in press). >This paper has now been published, so substitute "2006" for "in press", >and in the list of references the citation should include the following: > >J. Geophys. Res. 111, D07101, doi:10.1029/2004JD005578 > >Page 6-34, lines 43 and 44. This section is dealing with the southern >hemisphere. The sentence "...these both indicate unusually warm >conditions prevailing in the 20th century (Pollack and Smerdon, 2004)" >, and the reference therein, are both incorrect. > >The ground surface temperature changes over the last 500 years DO NOT >indicate unusually warm conditions prevailing in the 20th century in >Australia and southern Africa. This is because the unusually warm >conditions developed late in the century, after most of the boreholes >had already been logged. What the borehole reconstruction for >Australia does show is very good correspondence with the Cook et al >(2000) reconstruction for Tasmania and the Cook et al. (2002) recon for >New Zealand. The Australia work is described in a manuscript “Five >centuries of Climate Change in Australia: The View from Underground” by >Pollack, Huang and Smerdon now under review in the Journal of >Quaternary Science. The Africa work is unpublished. > >Is this e-mail to you sufficient to activate these changes? Or should I >submit these comments to the US Government Review Panel? If I am to >submit to the latter, they require all comments to be filed by May 9. > >Cheers, >Henry > > > ___ ___ Henry N. Pollack >[ \ / ] Professor of Geophysics > | \/ | Department of Geological Sciences > |MICHIGAN| University of Michigan >[___]\/[___] Ann Arbor, Michigan 48109-1005, U.S.A. > > Phone: 734-763-0084 FAX: 734-763-4690 > e-mail: hpollack@umich.edu > URL: www.geo.lsa.umich.edu/~hpollack/ > URL: www-personal.umich.edu/~hpollack/book.html -- Jonathan T. Overpeck Director, Institute for the Study of Planet Earth Professor, Department of Geosciences Professor, Department of Atmospheric Sciences Mail and Fedex Address: Institute for the Study of Planet Earth 715 N. Park Ave. 2nd Floor University of Arizona Tucson, AZ 85721 direct tel: +1 520 622-9065 fax: +1 520 792-8795 http://www.geo.arizona.edu/ http://www.ispe.arizona.edu/