> Are you sure what you're speculating about? The distributed computing
> client receives seed data and runs a model based on starting parameters.
> It is not modified with additional data while it runs. So I don't believe
> I'm convinced that such a model would likely diverge at the current date.
The problem is that the forcing isn't known well for the 20th century.
That's why climate sensitivity is not well constrained by 20th century
data.
The only way to make model runs of the 20th century closely match
reality is by choosing corresponding forcings, that is for high
climate sensitivity high aerosol forcing, and for low climate
sensitivity low aerosol forcing.
http://climateprediction.net/content/public-presentations-talks-and-posters
(Myles Allen, What can be said about future climate? Quantifying
uncertainty in multi-decade climate forecasting, Harvard University,
February 2008.) slide 7
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