cc: Eystein Jansen <eystein.jansen@geo.uib.no>, Andrew Weaver <weaver@uvic.ca>, Weijian Zhou <weijian@loess.llqg.ac.cn>, Peter Clark <clarkp@geo.oregonstate.edu>, Keith Briffa <k.briffa@uea.ac.uk>, Michael E Mann <mann@virginia.edu>, Paul Valdes <p.j.valdes@bristol.ac.uk>, Valerie Masson <valerie.masson@cea.fr>, James Hurrell <jhurrell@ncar.ucar.edu>, Elsa Cortijo <elsa.cortijo@lsce.cnrs-gif.fr>, Juerg Beer <beer@eawag.ch>, Andreas Schmittner <andreas@passagen.uni-kiel.de>, Jonathan Overpeck <jto@u.arizona.edu>, christoph.kull@pages.unibe.ch, ereno@at.fcen.uba.ar, Detemmerman_V@gateway.wmo.ch, mdsp@mercury.noc.soton.ac.uk, hyc@mercury.noc.soton.ac.uk, rbos@obs-vlfr.fr, caetano@soc.soton.ac.uk, legler@usclivar.org
date: Wed, 18 May 2005 06:51:51 -0400 (EDT)
from: Gavin Schmidt <gschmidt@giss.nasa.gov>
subject: Re: Fwd: model
to: zhongwei yan <zxy@noc.soton.ac.uk>

<x-flowed>

The reference given shows this long term run of bryson's energy balance 
model as a bit of an afterthought. The only inputs are orbital forcing and 
a volcanic index of uncertain provenance and scaling. No solar forcing is 
used. Thus just using this figure out of context would seem to be more 
confusing than enlightening (though it simply reflects the volcanic 
forcing used). Unless you were collecting all published 
millenial simulations (rather than just the most enlightening), I would 
not recommend adding it to the site. If you are collecting all such data, 
the site needs to be extremely clear about what kind of models are used, 
and what the input data is.

Gavin

*--------------------------------------------------------------------*
| Gavin Schmidt             NASA/Goddard Institute for Space Studies |
|                           2880 Broadway                            |
| Tel: (212) 678 5627       New York, NY 10025                       |
|                                                                    |
| gschmidt@giss.nasa.gov    http://www.giss.nasa.gov/~gavin          |
*--------------------------------------------------------------------*

On Wed, 18 May 2005, zhongwei yan wrote:

> Dear CLIVAR-PAGES members,
>
> I suppose some of you also received the following message from Reid Bryson. 
> Anyone knows more details and any comments? Should this work (about the last 
> millennia) be highlighted at CLIVAR's web site or PAGES'?
>
> Cheers, Zhongwei
>
>> Date: Tue, 17 May 2005 11:17:31 -0500
>> From: Reid Bryson <rabryson@wisc.edu>
>> Subject: model
>> X-Sender: rabryson@wiscmail.wisc.edu
>> To: zxy@soc.soton.ac.uk
>> X-Spam-Report: AuthenticatedSender=yes, SenderIP=144.92.131.188
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>> X-MailScanner-NOCS-From: rabryson@wisc.edu
>> Status: 
>> Colleagues,
>> 	Here is another type of model to put into the PAGES-CLIVAR coop and 
>> comparisons.. 	This is a new higher resolution version of the model 
>> used in:
>> Ruter, A.H., J. Arzt, S. Vavrus, R.A. Bryson, and J.E. Kutzbach (2004) 
>> Climate and environment of the subtropical and tropical Americas (NH) in 
>> the mid-Holocene: comparison of observations with climate model 
>> simulations.  Quaternary Science Reviews 23(5-6):663-679.
>> 
>> --
>>  Reid A. Bryson  Ph.D. D.Sc..D.Engr.
>> Global 500 Laureate
>> Senior Scientist, Center for Climatic Research
>> Emeritus Prof. of Meteorology, of Geography, and of Environmental Studies
>> Univ. of Wisconsin, 1225 W. Dayton St., Madison, WI 53706
>> Ph. 608-262-5814, FAX. 608-263-4190
>> http://ccr.meteor.wisc.edu/bryson/bryson.html
>> 
>> "If you can't say it in plain English, you probably don't understand it 
>> well enough to be talking about it in the first place."
>
>
> -- 
> ***********************************
> Dr. Zhongwei Yan
> International CLIVAR Project Office
> Southampton Oceanography Centre
> European Way, Southampton SO14 3ZH
>
> Email: zxy@soc.soton.ac.uk
> http://www.clivar.org/
> ***********************************
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