date: Mon, 01 Jun 2009 15:40:51 +0100
from: "peter.thorne" <peter.thorne@metoffice.gov.uk>
subject: Summary
to: Phil Jones <p.jones@uea.ac.uk>

Phil,

Thanks for taking the time in the meetings. Hope that traffic wasn't too
horrendous. Please update as you see fit.

What I think we decided was this:

We hold back on HadCRUT4 until both HadSST3 and CRUTEM4 are published.

We aim for this release to be Dec 2010 / Jan 2011

We have parallel internal versions once HadSST3 is being updated

Envisage in 2010 John K undertaking an update to CRUTEM to accomodate
extra stations and tweaking land / sea merge and global average
calculation steps.

CRUTEM4 / HadCRUT4 paper would consist of:
1. New data (see action on PT)
2. Tweaked error model (urban and screens geographically variant)
3. Section assessing sensitivity to land-sea merge
4. Global average calculation assessment

Actions:

PT to contact Matt Menne of NCDC to try to ascertain the likely extra
data we could gain from their holdings.

PT to contact Tom Peterson to try to gain an urban / rural assignment
catalogue.

Post-AR5 would have to be a more in-depth error model and the grand
vision although Phil expressed doubts about their efficacy / value for
money vis-a-vis other potential uses.

Peter
-- 
Peter Thorne   Climate Research Scientist
Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB
tel. +44 1392 886552 fax +44 1392 885681
www.metoffice.gov.uk/hadobs
