date: Fri Jan 18 17:46:42 2008
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: Global Temperatures
to: "Roger Coe" <rogercoe804@btinternet.com>

    Roger,
       Not in the short term, because we (Jim and me) don't see the issue
    as high priority.
       There errors on the individual values. You do look at trends over
    the longest period to include satellite data. The Satellite data isn't
    the surface so doesn't have to agree. You could look at the RSS
    satellite series as well.
    Cheers
    Phil
   At 15:15 18/01/2008, you wrote:

     Phil,
     Thank you for your response, there seems to be general agreement that the Arctic
     temperatures are a problem.
     I have collated the hemispheric decadal trends over the 32 year period for the 3 main
     datasets as follows.

                                                     Global                        N
     Hemisphere                S Hemisphere

         HadCRUT3                            0.15C
     0.24C                                0.13C
         GISTEMP                             0.21C
     0.31C                                0.11C
         UAH Satellite                        0.14C
     0.21C                                0.07C

     These figures also show a high value for the GISTEMP N Hemisphere, and their figure for
     the N polar region is 0.57C/decade.
     Hansen emphasises the importance of the Arctic data in determining the true global
     temperature and gives some indication of his methodology. Do you see any prospect of
     reconciling the differences which have developed between the two land based datasets,or
     is there a genuine difference in coverage.
     I was also interested in Hansen's comments on Solar Variability which suggest a bigger
     influence than he has previously
     acknowledged. He is even interested in solar cycle 24.
     Regards

     Roger.


   Prof. Phil Jones
   Climatic Research Unit        Telephone +44 (0) 1603 592090
   School of Environmental Sciences    Fax +44 (0) 1603 507784
   University of East Anglia
   Norwich                          Email    p.jones@uea.ac.uk
   NR4 7TJ
   UK
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