Friday, April 27, 2012

3564.txt

cc: "Keith Briffa" <k.briffaatXYZxyz.ac.uk>
date: Wed Jun 1 12:45:01 2005
from: Tim Osborn <t.osbornatXYZxyz.ac.uk>
subject: IPCC AR4 model runs of last 1000 years
to: Hugues Goosse <hgsatXYZxyzr.ucl.ac.be>

Dear Hugues,

Keith Briffa, with some input from me, is preparing a section on the climate of the last 2000 years for the next draft of the IPCC Paleoclimate chapter.

We are including some model simulations and forcings from experiments of the last 1000 years, and have begun to produce a figure - see the attached early version (note that labelling is wrong etc. so don't use it).

Is there a suitable simulation from your work with ECBILT-CLIO-VECODE that you would like to be included in this IPCC figure? I guess results from Goosse et al. (2005; GRL) or Goosse et al. (in press, QSR) would have suitable simulations in them?

If the answer is yes, then I would need a single simulation. We cannot include ensemble members or multiple runs with different forcings, simply because the figure would become too complicated (I know though these ranges are important in comparing models with each other and with paleo data, but we cannot include many tens of curves and/or ranges).

I would need the following information/data (see also attached table/refs):

(1) Model name and reference (and, if multiple simulations are described by the reference, then some indication of what data you are sending - e.g. ensemble mean from the XX experiment).

(2) Global-mean forcings, specifying separately:
(a) volcanic
(b) solar
(c) anthropogenic forcing (GHGs, aerosols, ozone etc.) and if possible include here pre-industrial GHG forcing if you included such variations in your experiment.

(3) NH-mean temperature (optionally include NH-land temperature and full global-mean temperature, in case the IPCC authors decided that some other figure panel is needed) from one simulation or an ensemble mean.

I hope that you agree to contribute some data to this IPCC figure, and that this data request is not too time consuming!

Best wishes

Tim


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