date: Fri Oct 10 14:52:43 2003
from: Mike Hulme <m.hulme@uea.ac.uk>
subject: Fwd: Genie: deep ocean temperature & sea-level
to: r.warren@uea.ac.uk

   For info.
   Mike

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     Date: Thu, 09 Oct 2003 16:58:27 +0100
     To: Mike Hulme <m.hulme@uea.ac.uk>
     From: John Shepherd <j.g.shepherd@soc.soton.ac.uk>
     Subject: Genie: deep ocean temperature & sea-level
     Mike
     re using the Genie model for millennial studies,  deep ocean temperature & sea-level,
     which we discussed, please see messages below... It sounds as though the tuned version
     (parameters chosen statistically to get best fit to the data, which we can do because
     the model is so fast) is doing pretty well, as good as (or better than) most GCM's, so I
     think this could be a runner....
             John

     From: Julia Hargreaves <jules@jamstec.go.jp>
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     To: "James D. Annan" <jdannan@jamstec.go.jp>
     Cc: Tim Lenton <tlent@ceh.ac.uk>, jgre@bgs.ac.uk, genie-science@imperial.ac.uk
     Subject: Re: [genie-science] Re: Hydrate modelling
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     Date: Wed, 08 Oct 2003 18:24:06 +0900
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     James has spurred me on to look at the results for the other deep ocean
     basins...
     The mean of our tuned ensemble is about 1.5 degrees too warm in the
     Atlantic and Southern Oceans, about 0.5 degrees in the Pacific and 0.25
     degrees in the Indian, The 1 std spread of the ensemble is of the order
     of one degree. Errors in the upper ocean are bigger!
     jules
     James D. Annan wrote:
     >Tim Lenton wrote:
     >
     >
     >
     >>1. Deep ocean / sea floor temperatures are notoriously badly predicted
     >>by global models, tending to be systematically too warm. Ours is no
     >>exception.
     >>
     >>
     >
     >Our tuned model (ensemble) actually seems to give pretty good deep ocean
     >temperatures, at least inasmuch as we've looked at them (ie deep Pacific
     >2.5C versus Levitus data 2C). However I cannot guarantee that other
     >aspects of the model state are in any way realistic!
     >
     >James
     >
     >
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