Monday, May 7, 2012


date: Fri Jan 18 17:46:42 2008
from: Phil Jones <>
subject: Re: Global Temperatures
to: "Roger Coe" <>

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.
At 15:15 18/01/2008, you wrote:

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
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.


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

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