cc: Eystein Jansen <eystein.jansen@geo.uib.no>, "Piers Forster" <p.m.forster@reading.ac.uk>
date: Wed, 5 Jan 2005 09:55:24 -0700
from: Jonathan Overpeck <jto@u.arizona.edu>
subject: Chapter 2 Forcings - the latest on solar from Judith Lean
to: Keith Briffa <k.briffa@uea.ac.uk>, Gabi Hegerl <hegerl@duke.edu>, cddhr@giss.nasa.gov, Fortunat Joos <joos@climate.unibe.ch>, joos <joos@climate.unibe.ch>, "Ricardo Villalba" <ricardo@lab.cricyt.edu.ar>, lean@demeter.nrl.navy.mil

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Hi gang - attached is the hot off the press view on solar and 
volcanic forcing from Chap 2. The purpose of my email is to start the 
process of making sure we (at least chapters 2, 6 and 9) have 
compatible perspectives on the isses, particularly solar.

Keith is the chapter 6 lead (Ricardo the second) on the last 2000 
years (section 6.3.2.1), and David and Fortunat on climate forcing 
(sec 6.5.2). David and Keith are doing our last 2000 model eval 
section (sec 6.4.3.2). In order to help Keith and Ricardo get their 
section down to size, we've suggested that they move discussion of 
the forcing to 6.5.2 (David and Fortunat need to finish this). Keith 
has not yet responded that this is ok, but let's go with it until he 
gets back into the mix.

I've also sent this to Gabe (Happy New Year Gabe!).

I suggest that the likely email discussion of the solar issue 
(perhaps volcanic will be a bit hot too) is cc'd to all on this 
email, plus any others that we think are key. I'm not sure Judith is 
on email right now, but she's on the list too for obvious reasons 
(Piers is the CLA coordinating this for Chap 2, so he's on too).

My personal take is that much of what has been done wrt to solar in 
the paleo literature is now more suspect, but I think Fortunat in 
particular might have some sage comments on this. The main thing is 
that we don't ignore the latest work that suggests that solar forcing 
is more subdued than often thought.

Debate? Thanks Chap 6 authors for coordinating with the other 
chapters (e.g., 2 and 9) on this issue.

Best to all, Peck



>X-Sieve: CMU Sieve 2.2
>From: "Piers Forster" <p.m.forster@reading.ac.uk>
>To: "'Jonathan Overpeck'" <jto@u.arizona.edu>
>Subject: RE: Early draft: Natural Forcings
>Date: Wed, 5 Jan 2005 11:07:01 -0000
>Thread-Index: AcTyk5zrDHPy1i6XQ6OYxcStlz6FtwAgtapg
>X-Scanner: exiscan *1Cm919-00056N-00*XIzGZ/vmCRE* (The University of Reading)
>X-Virus-Scanned: by amavisd-new at email.arizona.edu
>
>
>Yes, please do send it...
>This is what we have at the moment
>Cheers
>
>Piers
>
>

-- 
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
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University of Arizona
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direct tel: +1 520 622-9065
fax: +1 520 792-8795
http://www.geo.arizona.edu/
http://www.ispe.arizona.edu/
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Attachment Converted: "c:\eudora\attach\natual.doc"
