Thursday, June 14, 2012


date: Tue, 11 Jan 2005 11:47:21 -0500
from: David Rind <>
subject: Re: [Wg1-ar4-ch06] Bullet points for the executive summary for
to: Stefan Rahmstorf <>, Jonathan Overpeck <>

Sorry, but I don't think the first comment is either necessarily true
or helpful to the chapter. The "encouraging successes" I believe are
not based on first principle models - here Stefan and I disagree most
strongly, but I would say my point of view does represent that of GCM
modelers in general. Concerning the disagreement in the other
sections I've agreed to mute my comments in this regard, but saying
that such models have effectively solved problems (encouraging
successes) is too much. I would end the first paragraph for section
6.2.3 without that last phrase - but then the remaining comment has
already been made in that section.

Concerning the second comment: I think that's a fair statement.


At 2:40 PM +0100 1/11/05, Stefan Rahmstorf wrote:
>I propose the following draft bullet points:
>(section 6.2.3 - paleo modeling)
>- Paleoclimatic modeling has become a well-established branch of
>climate research in recent years. The full spectrum of models that
>is used for simulating present climate and future scenarios is now
>being tested on many different problems of past climate, with
>encouraging successes. [Could specify some examples if desired.]
>(section - model evaluation of abrupt changes)
>- Climate models are used to explore the possible mechanisms of past
>abrupt climate changes with encouraging results. Although the
>research has not yet consolidated into a generally accepted theory,
>several viable mechanisms for abrupt climate changes have been
>demonstrated in models. The increasing availability of
>high-resolution paleoclimatic data is providing very useful data
>constraints for testing these hypothesis.
>Stefan Rahmstorf
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