From: Kevin Trenberth <trenbert@ucar.edu>
To: Phil Jones <p.jones@uea.ac.uk>
Subject: Re: Draft paper on Chinese temperature trends
Date: Mon, 14 Jan 2008 09:03:31 -0700
Cc: david.parker@metoffice.gov.uk, Thomas.C.Peterson@noaa.gov, Reinhard Boehm <Reinhard.Boehm@zamg.ac.at>, Susan Solomon <Susan.Solomon@noaa.gov>, Adrian Simmons <adrian.simmons@ecmwf.int>

   Hi Phil
   I'll read it more thoroughly later.  My quick impression, more from the abstract than the
   main text, is that you are defensive and it almost seems that there is a denial of the UHI
   in part.  Yet later in the abstract and nicely in the first two sentences of the
   conclusions, you recognize that the UHI is real and the climate is different in cities.
   The point is that the homogenization takes care of this wrt the larger scale record and
   that UHI is essentially constant at many sites so that it does not alter trends.  So I urge
   you to redo the abstract and be especially careful of the wording.
   You might even start with:
   The Urban Heat Island (UHI) is a real phenomenon in urban settings that generally makes
   cities warmer than surrounding rural areas.   However, UHIs are evident at both London and
   Vienna, but do not contribute to the warming trends over the 20th century because the city
   influences have not changed much over that time.  Similarly, ...
   Regards
   Kevin
   Phil Jones wrote:

      Dear All,

             I have mentioned to you all that I've been working on a paper on
      Chinese temperature trends. This partly started because of allegations
      about Jones et al. (1990). This shows, as expected, that these claims
      were groundless.
          Anyway - I'd appreciate if you could have a look at this draft.  I have
      spelt things out in some detail at times, but I'm expecting if it is published
      that it will get widely read and all the words dissected. I know you're all
      very busy and I could have been doing something more useful, but it hasn't
      taken too long.
         The European examples are just a simple way to illustrate the difference
      between UHIs and urban-related warming trends, and an excuse to
      reference Luke Howard.
      Cheers
      Phil
     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    [1]p.jones@uea.ac.uk
     NR4 7TJ
     UK
     ----------------------------------------------------------------------------


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Kevin E. Trenberth                  e-mail: [2]trenbert@ucar.edu
Climate Analysis Section,           [3]www.cgd.ucar.edu/cas/trenbert.html
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References

   1. mailto:p.jones@uea.ac.uk
   2. mailto:trenbert@ucar.edu
   3. http://www.cgd.ucar.edu/cas/trenbert.html

