What trend would you like with your graph sir?
Feb 2, 2012
Bishop Hill in Climate: CRU, Climate: Jones, Climate: Surface

Thanks to reader William for pointing out Climategate 2 email 4578. The context seems to be a discussion of how to present temperature trends, and it is worth reading the full email thread. But Jones' contribution to the thread looks a bit problematic.

date: Mon Jul 18 14:25:52 2005
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: Text and CQ stuff
to: "Parker, David (Met Office)" <david.parker@metoffice.gov.uk>, Kevin Trenberth <trenbert@ucar.edu>

Kevin,

Even without smoothing it is possible to get a trend of nearer 0.75 if the trend starts around 1920 (especially if the cold year of 1917 is at the start). The periods chosen for Table 3.2.2 had some justification, so we need to be a little careful. As a schematic for CQ2 though, it will be a different way of showing the same data.


I'll talk it over with David.

Cheers

 

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