Phil Hays wrote:
> "Snowball Earth" is not as far away from the current climate as we are
> likely to change the climate, however in the other direction. Taking
> a doubling of CO2 as a unit of measure, roughly two halvings of CO2
> from pre-industrial. We are moving the other way, so this isn't much
> of a concern for us, except for one point. Last I heard, current
> climate models can't reproduce these events, unlike older climate
> models. The models do produce a substantial non-linearity, but the
> cooling stops well before the ocean has completely frozen. Has this
> changed, or in other words does one or more of the modern models
> reproduce these events? What about the models you work with?
I haven't tried anything colder than the last glacial maximum. The
problem (from my perspective) with simulating much older and potentially
colder states is that there is very limited data on what conditions were
like at that time, which makes it rather pointless from the POV of
testing and validating models (which is my primary aim).
James
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