cc: Keith Briffa <k.briffa@uea.ac.uk>
date: Wed May 24 16:51:51 2006
from: Tim Osborn <t.osborn@uea.ac.uk>
subject: Re: BP briefing
to: peter.stott@metoffice.gov.uk

   Peter - I've discussed with Keith and attach a few PPT slides.  Hopefully they are of some
   use.  They are:
   (1) A composite of various NH temperature reconstructions done by us pre-Moberg, but then
   Science added the Moberg series and published it again (without telling us or acknowledging
   us would you believe!).
   (2) A composite of various simulated NH temperature time series published recently by us (a
   month or so ago in Clim. Dyn.).
   (3-4) These show the envelope of reconstructions in grey, then overlaid in red by the
   envelope of model simulations.  Useful showing model consistency with the real world.  Not
   yet published.  Please don't give to anyone else, but feel free to use it for your
   presentation if you want.
   (5-11) Set of slides from our recent Science paper, hopefully self explanatory.
   Feel free to use or not use any of this material as you see fit.  It would be nice to know,
   however, if you do use any of it.
   Cheers
   Tim
   At 14:05 24/05/2006, you wrote:

     Dear Tim and Keith
     I have to give a presentation to senior BP Executives next Wednesday
     (list is
     Steven E. Koonin Chief Scientist
     Joseph P. Merlini, Director Strategic Cooperation
     Chris J. Mottershead, Distinguished Advisor, Energy  & the Environment
     John K. Wells, Vice President Environment
     Duncan G.M. Eggar, Senior Business Advisor & Team Leader -Sustainable
     Mobility)
     answering amongst other questions the following question
     "Many papers published in the past few years show that the MBH record
     very likely under-estimates temperature variability over the past 1500
     years.  Presumably the GCMs were able to reproduce (or were tuned to)
     the low MBH variability.  How do they have to be modified to reproduce
     the greater variability? What implications does that have for
     attribution and predictions going forward?"
     Figures 6.10 and Fig 6.13 of the IPCC AR4 would be useful but of course
     they are still under wraps. Alternatively the latest equivalent I have
     is from Mann et al, EOS, 84, 256-258, 2003 but this does not include
     series like Moberg 2005. Do you know whether there is a more recent
     equivalent published like Fig 6.10 and 6.13 ?
     Many thanks for any help or pointers,
     Peter
     -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      Dr. Peter Stott   Climate Scientist   Met Office
      Hadley Centre for Climate Prediction and Research (Reading Unit)
      Meteorology Building,  University of Reading, Reading RG6 6BB
      Tel: +44 (0)118 378 5613   Fax: +44 (0)118 378 5615
      Mobile: 07753880683
      E-mail:peter.stott@metoffice.gov.uk   [1]http://www.metoffice.gov.uk
      NOTE WILL ALSO BE AT EXETER PART OF EACH WEEK
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

