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

Alfio Puglisi alfio.puglisi at gmail.com
Wed Mar 3 21:37:36 UTC 2010


If you mean in human history, AFAIK there hasn't been a global raise of
1°C/century in historical times. Before that, I'm not sure that even ice age
recovery rates can match that.

Alfio


2010/3/3 Dan <dan_ust at yahoo.com>

> While true on the _known_ rise in CO2 levels, it's not true in terms of
> climate change in historical times, no?
>
> Regards,
>
> Dan
>  *From:* Alfio Puglisi <alfio.puglisi at gmail.com>
>
> *To:* ExI chat list <extropy-chat at lists.extropy.org>
> *Sent:* Wed, March 3, 2010 11:56:20 AM
>
> *Subject:* Re: [ExI] Phil Jones acknowledging that climate science
> isn'tsettled
>
> 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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>
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