date: Wed Sep 15 09:33:28 2004
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: Gridded DTR files
to: "David Wuertz" <David.Wuertz@noaa.gov>, Russell Vose <Russell.Vose@noaa.gov>

    Dave,
       To clarify, there are two potential papers:
    1. The mean temperature comparisons of GHCN/CRU/NASA that you or Russ sent me
    some time ago. This would make a nice contribution to GRL, showing that there is hardly
    any difference between the 3 land analyses. One of you gave Dave Easterling some
    plots for the SH, NH, globe and also for Australia. Russ had some text. If this can be
   expanded
    on and completed/submitted it can be referred to by IPCC - and maybe keep the skeptics
   quiet
    for a few days.
    2. I'm hoping the DTR dataset can be compared to the ERA-40 reanalyses over the period
    1958-2001. The mean temperature comparisons have been compared (with the CRU data)
    - see
    The ERA-40 Project Report on the ERA-40/NCEP/CRU comparisons has been published on our
   website:
   <[1]http://www.ecmwf.int/publications/library/do/references/list/192>
    It is report # 18. A paper has almost been accepted on this by JGR.
    I will forward your email to Adrian Simmons at ECMWF to show him the coverage. I'll
    see if he has time to do something soon, or wants to wait for the newer version, which
   Russ
    says will have more stations in some regions. Ideally what we'd like is the gridded 5 by 5
   deg
    file for comparisons. I'll email you once I've got a reply from Adrian, about when he can
   do
    something.
     I'm away much of the next 6 weeks at a series of meetings, so responses might be slow.
      You seem to be in a bad way, with water problems and Ivan on the way. Hope you get
   through
    it all without too much hassle. Meanwhile Russ is down the pub and doing London and
    brushing up on the Bard. To even things up, Dave, London generally does the visitors
    and Shakespeare probably didn't write all the plays !
    Cheers
    Phil
   At 19:34 14/09/2004, David Wuertz wrote:

     Russ & Phil,
     I'm a bit confused.  We have only used mean temperature for the GHCN/CRU comparison, so
     no DTR.
     However, I did find some DTR analysis I did last October 22-24.  I've attached several
     related graphics files. [Russ, I found these on Argus in
     ~dwuertz/projects/max_min/adjusted/prelim.  This analysis used a preliminary version of
     the recently updated GHCN max/min data set (I believe), and adjustments made by the
     recent Menne/Williams method (I believe).]
     Are these the results Phil is interested in?  If so, I can probably locate the ASCII
     data that correspond to the attached maps of DTR trends.  I will send those in a
     subsequent email after while if I do not hear from you, just in case this is what you
     want.  If I'm sending you the wrong stuff, please let me know along with more detail
     next time, and hopefully I'll get it right.
     I see that it's pub time there, so I may not hear from you until morning.
     Cheers,
     -Dave

   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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