date: Wed Apr 30 14:51:13 2008 from: Keith Briffa subject: Re: Hansen's latest to: "Rachel Warren" Rachel truth is that I HAVE NOT read this - and will try to get to it - but loaded down for a few days with marking. At very quick glance I am dubious Keith At 14:31 30/04/2008, you wrote: Keith Have you read the attached (Hansen's latest? - downloaded from his website)? I'd be interested to know if you agree with his palaeoclimatic analysis or not. This analysis uses palaeoclimatic data and fairly simple calculations to show that long term climate sensitivity is 6C (as opposed to short term which he agrees is around 3C). It seems well reasoned to me but then I am not an expert on palaeoclimate ... Rachel -- Dr Rachel Warren Senior Research Fellow Tyndall Centre Zuckermann Institute University of East Anglia Norwich NR4 7TJ Telephone 01603 593912 Fax 01603 593901 E-mail r.warren@uea.ac.uk Content-Type: application/pdf; name="TargetCO2, Where should humanity aim_20080331.pdf" X-Attachment-Id: f_ffny3tft0 Content-Disposition: attachment; filename="TargetCO2, Where should humanity aim_20080331.pdf" -- Professor Keith Briffa, Climatic Research Unit University of East Anglia Norwich, NR4 7TJ, U.K. Phone: +44-1603-593909 Fax: +44-1603-507784 [1]http://www.cru.uea.ac.uk/cru/people/briffa/