date: Wed, 14 Jul 1999 13:54:30 +0000
from: Sir John Houghton <jthoughton@ipccwg1.demon.co.uk>
subject: tar ch 13 draft 0 comments
to: tar13@meto.gov.uk

TO LINDA MEARNS AND MIKE HULME
FROM JOHN HOUGHTON
PLEASE SEE COMMENTS ON ZERO DRAFT OF CH 13


o The chapter presents useful and helpful background information and
assessment for those employing or wishing to employ climate scenarios. 

o The chapter would be more readable if it were shorter and punchier 
-many of the sentences are more complicated -or convoluted - than they
need be. 

o Can there be more emphasis on climate extremes and how appropriate
scenarios for these can be provided? There is quite a bit on climate
variability but it is the extremes how their intensity and frequency
might change - that provide the greatest impact.

o There is significant overlap with  chapter 10 esp for instance in 13.4
which can probably be significantly shortened by reference to ch 10.

o The chapter contains a few examples. But it would be much more
interesting, readable and useful if there were more examples (say 2 well
chosen ones) of climate scenarios and their use.



-- 
--------------------------------------------
Sir John Houghton
IPCC WGI Co-chair
Hadley Centre
Met Office
London Road 
Bracknell
Berks, RG12 2SY

Email: jthoughton@ipccwg1.demon.co.uk
http://www.ipcc.ch
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