date: Fri Sep 19 14:57:47 2008
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: your references
to: <zhaozc@cma.gov.cn>

    Zong-ci,
       Here are two pdfs.
    The paper by Brohan et al (2006) is too big to email. This papers
    looks at the uncertainty in more detail than earlier.
       Also I've attached a recent paper on Chinese urban issues in JGR.
    I think China is one of the few places that are affected. The paper
    shows that London and Vienna (and also New York) are not affected
    in the 20th century.
       There are a couple of issues re your points 1-4. The stations don't
    need to be continuous. We are using anomalies, so all we need
    is the base period of 1961-90.  The third attachment has a figure in of
    the effect of changing numbers.
    Cheers
    Phil
   At 03:26 19/09/2008, you wrote:

     Dear Phil:
     A famous Chinese Journal asked me to review a Chinese paper.
     They investigated on the uncertainties of the global observed data of the surface air
     temperature for the last 100 years by the IPCC AR4. They argued and oppugned the global
     warming for the last 100 years. They show several key points:
     (1)A low coverage of the observed temperature
     (2)An asymmetric distribution of the observed temperature
     (3)The different decades had the various numbers of the stations for the last 100 years
     (4)The data of most stations are discontinuous. Only a few stations had the long time
     series such as 100 years.
     (5)Effects of Urbanization and heat islands on most stations
     I remembered that you and your group had investigated those issues for a long time. Can
     you send me some references by e-mail? For example, Brohan, P., et al., 2006,
     Uncertainty estimates in regional and global observed temperature changes: a new data
     set from 1850, J.G.R., III, D12106, doi:10.1029/2005JD006548; Jones, P.D. and A.Moberg,
     2003, Hemispheric and large-scale surface air temperature variations: An extensive
     revision and update to 2001, J.Clim., 16, 206-223and others.
     Thank you very much. I am sorry to disturb you.
     Best regards.
     Zong-Ci


   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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