cc: wg1-ar4-ch06@joss.ucar.edu
date: Wed, 20 Jul 2005 11:51:34 +0200
from: Stefan Rahmstorf <rahmstorf@ozean-klima.de>
subject: Re: [Wg1-ar4-ch06] Comments on exec bullets
to: Bette Otto-Bliesner <ottobli@ucar.edu>

<x-flowed>
Hi Bette,

thanks for your response to my bullet concerns.

Concerning bullet 9, you put my questions to rest - I can see now that 
it is a bullet we can support well.

Concerning bullet 5, your suggested rephrasing goes in the right 
direction. The additional global cooling due to vegetation feedback in 
HadCM3 (0.6 C) agrees well with that in our model (0.7 C). I agree 
that Kim et al. is an outlier that is hard to understand - it is always 
tricky how to deal with such outliers in an assessment like IPCC.
In the spirit of your rephrasing, how about this version:

* The Last Glacial Maximum featured reduced atmospheric concentrations 
of greenhouse gases, increased atmospheric aerosols, and altered land 
ice and vegetation. In a coordinated international multi-model 
experiment (PMIP-2), models simulate a change in global mean surface air 
temperature change between the Last Glacial Maximum and the current 
interglacial of 3.1 to 5.1C when considering greenhouse forcing and 
continental ice changes (radiative forcing change of -4 to 7 W m-2). The 
other factors (vegetation and aerosol changes) have not yet been 
considered in most models, but initial results suggest they could cause 
additional cooling of ~ 2 C.

I agree with your split-off second part of the bullet.

Cheers, Stefan

-- 
To reach me directly please use: rahmstorf@ozean-klima.de
(My former addresses @pik-potsdam.de are read by my assistant Brigitta.)

Stefan Rahmstorf
www.ozean-klima.de
www.realclimate.org

_______________________________________________
Wg1-ar4-ch06 mailing list
Wg1-ar4-ch06@joss.ucar.edu
http://www.joss.ucar.edu/mailman/listinfo/wg1-ar4-ch06
</x-flowed>
