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

[Stefano Vaj]

2010/3/3 Alfio Puglisi <alfio.puglisi at gmail.com>

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

Is this also true for temperature levels? One wonders, because Greenland
seems far from having become green again...

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.
>

The Wikipedia entry however suggests that such change led to an *increased*
biological production "assisted by higher global temperatures and
CO2levels, as well as an increased nutrient supply (which would result
from
higher continental weathering due to higher temperatures and rainfall;
volcanics may have provided further nutrients)". :-/

-- 
Stefano Vaj
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