Saturday, June 9, 2012


cc: "Henry Pollack" <>, Eystein Jansen <>
date: Tue, 18 Apr 2006 15:38:25 -0600
from: Jonathan Overpeck <>
subject: Re: IPCC FAR draft

Hi Keith and Henry - since most (all but Henry?)
would not be using the gov review system, and
because the IPCC has a policy of not permitting
authors (LA or CA) to be expert reviewers of
their own chapter (makes sense when you think
about it), I think the system that all CA's
should be encouraged to use is the chapter 6
process which - unlike for the first order draft
- will explicitly ask for comments for the second
order draft.

Keith - see my email sent earlier today asking
for your input on how we'll do this.

If Henry wants to submit via the gov process, no
harm done, but it would be good to get the
comments in our process too. Main thing is that
we (Keith and team) deal with them.

best, peck

>Hi Henry (and Peck)
>can not respond in detail as away from my main computer for as couple of
>days - suggest best to submit comments directly to make sure they are in
>the system and we can reconsider and deal later. Cheers
>> 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
>> 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:
>> 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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Institute for the Study of Planet Earth
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