cc: Eystein Jansen , "Piers Forster" date: Wed, 5 Jan 2005 09:55:24 -0700 from: Jonathan Overpeck subject: Chapter 2 Forcings - the latest on solar from Judith Lean to: Keith Briffa , Gabi Hegerl , cddhr@giss.nasa.gov, Fortunat Joos , joos , "Ricardo Villalba" , lean@demeter.nrl.navy.mil 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" >To: "'Jonathan Overpeck'" >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 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/ Attachment Converted: "c:\eudora\attach\natual.doc"