[ExI] Phil Jones acknowledging that climate science isn'tsettled

[Alfio Puglisi]

On Wed, Mar 3, 2010 at 5:24 PM, Stefano Vaj <stefano.vaj at gmail.com> wrote:

> 2010/3/2 Christopher Luebcke <cluebcke at yahoo.com>:
> > But significant disruptions to ecosystems tend to cause a lot of
> suffering.
> > That's where my concern lies.
>
> Disruption as in...? Reduction in the aggregate mass of living
> organisms? Reduction of complexity? Rapid change? Mass extinction of
> some species?
>
> Any "historical" global warming-related examples of such disruptions?
>

In human history, no, because the current CO2 levels are unprecedented in
the last dozen million years or so.

In more ancient times, the PETM event (
http://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum )
might be a good example. It was a period of "sudden" global warming (6 °C
over 20,000 years) associated with major changes in marine and terrestrial
life.

Alfio
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