date: Thu Sep  2 15:53:19 2004
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: Notes from Friday
to: "Brohan, Philip" <philip.brohan@metoffice.com>

    Philip,
      I'll look at these tomorrow. Have forwarded to Harry. His email is i.harris@uea.ac.uk .
    Cheers
    Phil
   At 14:50 02/09/2004, you wrote:

     Hi Phil.
      It was good to talk to you on Friday, and to hear that the HadCRUT3
     work is starting. As promised, my notes from the meeting are below.
     Regards,
      Philip
     The CRU contract is nearly signed off. Phil realised that another person
     had to sign it, and this is being done. We have been sending our
     correspondence to the wrong address, it is going, correctly, to Alicia
     Meldrum, but she is at the University Registry, not at CRU.
     Phil has added some new data to the Jones file, mostly from Antarctica,
     through the READER project at BAS. Harry has also started work, he is
     merging in some new data for Mali and for the Congo (ex Zaire). Harry is
     also digitalising the old records of corrections applied at CRU. Phil
     has obtained lists of corrections from Canada and corrected and
     uncorrected data (do-it-yourself correction lists) from both Austria and
     Switzerland. We will use this to calculate statistics on the frequency
     and magnitude of corrections.
     Harry is also planning to go through the data looking for outliers
     (values more than 5-10C from what they should be) by comparison with
     climatology and re-analyses. We will collect statistics on these as
     well. We need to use these data to estimate the frequency of smaller
     transcription errors (~ 1C); we are not yet sure exactly how to do this.
     We discussed the climatology uncertainties. Only about 10% of the
     stations don't have a good climatology; in these cases climatologies are
     constructed  from pre 1961-90 data and corrected to the 1961-90 period
     by comparison with nearby stations with more data. We can estimate the
     uncertainties by making similar estimates for stations which do have
     1961-90 climatologies, and looking at the differences.
     To extend the Folland et al. 2001 treatment of urbanisation uncertainty
     from global to regional scales we need a spatially and temporally
     resolved urbanisation dataset. Phil suggested I contact Tom Peterson at
     NCDC and ask about their night-lights dataset. (I should read his paper
     in J. Clim</a> first (vol 16 no. 18 pp2941-59)).
     Phil gave me some information on the header formats in his station data
     files. I will add this information to our system documentation.
     I will get in touch with Harry (i.harris@uea.ac.uk). He should probably
     come to Exeter in a month or so.
     --
     Philip Brohan,  Climate Scientist
     Met Office   Hadley Centre for Climate Prediction and Research
     Tel: +44 (0)1392 884574    Fax: +44 (0)1392 885681
     Email: philip.brohan@metoffice.com  [1]http://www.metoffice.com

   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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