Monday, April 30, 2012


date: Fri, 18 Mar 2005 17:12:19 -0700
from: Jerry Meehl <>
subject: update on IPCC model analyses
to:,,, Ron Stouffer <>,,,,,,,,, Jim Hurrell <>, Dave Gutzler <>, Lisa Goddard <>, David Legler <>

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March 18, 2005

(we apologize if some of you receive this message more than once since
we are sending it to several email alias lists; we include the message
text below, as well as in an msword attachment)

Dear IPCC analysts,

Thank you to all who attended the very successful workshop in Honolulu
held March 1-4, and to all those who have been analyzing the IPCC AR4
model output who were not able to attend. It was clear from the workshop
that the models are being analyzed over a wide range of topics and that
some interesting results are already emerging. The multi-model analyses
are going to be major contributors to the success of the AR4.

The purpose of this email is to let you know how to feed the results of
your analyses into the AR4 drafting process

For those who were not able to come to the workshop, I would like to
confirm here the timescales on which material is required. To fit with
the IPCC review process, papers will need to be submitted to
peer-reviewed journals and available to IPCC lead authors by 1 MAY 2005,
and accepted for publication in a peer-reviewed journal by approximately
1 DEC 2005. These deadlines are set to allow lead authors time to
consider all available literature in time for the first and second AR4
drafts. Electronic copies of papers need to be sent to the appropriate
lead author contacts, with an electronic copy lodged with the WG1
Technical Support Unit (TSU) � see below.

For the May deadline, the authors need some form of draft paper to
assess. In almost all cases this will be in the form of a paper
submitted to a peer-reviewed journal. An exception to the need for a
peer-reviewed paper can be made for calculations of well-established
diagnostics (e.g. where the diagnostic and the lines of inference from
the results are described in a number of existing peer-reviewed papers).
This would be at the discretion of the lead authors and would be subject
to scrutiny by the WG1 Review Editors and Bureau. If you are planning
work of this type I would advise establishing early direct contact with
an appropriate lead author.

List of contacts for AR4 modelling chapters

Please email a pdf copy of your paper to the IPCC WG1 TSU
( and to the relevant contact points below. Note
that your study may be relevant to more than one chapter (e.g. a study
that considers both the control simulations of ENSO and future changes
in ENSO would be relevant to both Chapters 8 and 10).

Roughly speaking, Ch. 8 deals with simulations of aspects of the
climatology or processes in present-day climate, Ch. 9 addresses
simulation of trends or responses to specific forcings in 20th century
climate in addition to detection/attribution studies, Ch. 10 assesses
any aspect of climate change projections from global models, and Ch. 11
deals with aspects of regional climate change projections from regional
models or information downscaled from global models. These are not
strict boundaries, but are used for general guidance to give you a rough
idea of where to send copies of your papers. As long as you send copies
to the chapter contacts you think are relevant for your paper, it is
then the responsibility of the respective lead authors to sort out
exactly where your results will be assessed.

Chapter outlines can be found at:

Chapter 8: Climate Models and their Evaluation
Please send copies to the appropriate section contacts:
8.1 Introduction and Philosophy:
Richard Wood
8.2 Advances in Modelling (model formulation, resolution etc):
Akimasa Sumi
8.3 Evaluation of contemporary climate as simulated by coupled global
Karl Taylor
8.4 Evaluation of large-scale climate variability:
John Fyfe
8.5 Model simulations of extremes:
Jagadish Shukla
8.6 Climate Sensitivity and hydrological sensitivity:
Sandrine Bony
8.7 Mechanisms producing thresholds and abrupt climate change:
Ron Stouffer
8.8 Representing the global system with simpler models:
Thierry Fichefet

Chapter 9 : Understanding and Attributing Climate Change
Please send all papers to CLA Gabi Hegerl

Chapter 10: Global Climate Projections
Please send all papers to CLA Thomas Stocker

Chapter 11: Regional Climate Projections
Please send all papers to CLA Jens Christensen

The draft papers will be made available through the WG1 web pages to all
WG1 lead authors. Additionally, the TSU will set up a tracking sheet,
and it will be your responsibility to update this form as your paper
progresses through the review process. Further details regarding this
procedure will be forthcoming.

Thank you again for your contribution, and good luck with your writing!

Jerry Meehl
For the Ch. 8, 9, 10 and 11 Lead Authors, and for the WGCM Climate
Simulation Panel


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