From	Kevin Trenberth	Date	Mon, 14 Jan 2008 09:03:31 -0700
To	Phil Jones
CC	David Parker, Thomas C Peterson, Reinhard Boehm, Susan Solomon, Adrian Simmons
Subject	Re: Draft paper on Chinese temperature trends
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 ---------------------------------------------------------------------------- -- **************** Kevin E. Trenberth e-mail: [2]trenbert@ucar.edu Climate Analysis Section, [3]www.cgd.ucar.edu/cas/trenbert.html NCAR P. O. Box 3000, (303) 497 1318 Boulder, CO 80307 (303) 497 1333 (fax) Street address: 1850 Table Mesa Drive, Boulder, CO 80305 References 1. mailto:p.jones@uea.ac.uk 2. mailto:trenbert@ucar.edu 3. http://www.cgd.ucar.edu/cas/trenbert.html