Friday, June 15, 2012


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, 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
>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 The Africa work is unpublished.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.
> ___ ___ 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:
> URL:
> URL:

Jonathan T. Overpeck
Director, Institute for the Study of Planet Earth
Professor, Department of Geosciences
Professor, Department of Atmospheric Sciences

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