Text 16261, 96 rader
Skriven 2007-02-18 22:55:52 av Gary Britt (1:379/45)
Ärende: Re: where the hell is my global warming?
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From: Gary Britt <GaryNOSPAMBritt@generalcogster.com>

Who were driving the SUV's and burning fossil fuels to cause these huge
increases in CO2 levels back then?  Fred Flinstone's foot pedal vehicle didn't
burn fossil fuels and didn't qualify as an SUV?  Note that the increases in CO2
observed below were FAR more than measured by the global warming alarmists, so
what NATURAL process caused it and may be the real cause of CO2 rises now?

Gary

Rich Gauszka wrote:
> "Geo." <georger@nls.net> wrote in message news:45d91c19$1@w3.nls.net...
>  > The permian extinction was caused by global cooling not warming. It was
> the
>> FREEZE that they think killed off so much life. As I said, warm is more
>> life, cold baaaaaad..
>>
>  > http://park.org/Canada/Museum/extinction/permcause.html
>> Although the cause of the Permian mass extinction remains a debate,
>> numerous theories have been formulated to explain the events of the
>> extinction. One of the most current theories for the mass extinction of
>> the Permian is an agent that has been also held responsible for the
>> Ordovician and Devonian crises, glaciation on Gondwana. A similar
>> glaciation event in the Permian would likely produce mass extinction in
>> the same manner as previous, that is, by a global widespread cooling
>> and/or worldwide lowering of sea level.
>>
>> Cold=baaaaad...
>>
>> Geo.
>
> actually new models suggest higher temps
>
> Climate Model Links Higher Temperatures to Prehistoric Extinction
>
> http://www.ucar.edu/news/releases/2005/permian.shtml
> August 24, 2005
>
> BOULDER—Scientists at the National Center for Atmospheric Research (NCAR)
> have created a computer simulation showing Earth's climate in unprecedented
> detail at the time of the greatest mass extinction in the planet's history.
> The work gives support to a theory that an abrupt and dramatic rise in
> atmospheric levels of carbon dioxide triggered the massive die-off 251
> million years ago. The research appears in the September issue of Geology.
>
> "The results demonstrate how rapidly rising temperatures in the atmosphere
> can affect ocean circulation, cutting off oxygen to lower depths and
> extinguishing most life," says NCAR scientist Jeffrey Kiehl, the lead
> author.
>
>
> Kiehl and coauthor Christine Shields focused on the dramatic events at the
> end of the Permian Era, when an estimated 90 to 95% of all marine species,
> as well as about 70% of all terrestrial species, became extinct. At the time
> of the event, higher-latitude temperatures were
>
> 18 to 54 degrees Fahrenheit (10 to 30 degrees Celsius) higher than today,
> and extensive volcanic activity had released large amounts of carbon dioxide
> and sulfur dioxide into the atmosphere over a 700,000-year period.
>
> To solve the puzzle of how those conditions may have affected climate and
> life around the globe, the researchers turned to the Community Climate
> System Model (CCSM). One of the world's premier climate research tools, the
> model can integrate changes in atmospheric temperatures with ocean
> temperatures and currents. Research teams had previously studied the Permian
> extinction with more limited computer models that focused on a single
> component of Earth's climate system, such as the ocean.
>
> The CCSM indicated that ocean waters warmed significantly at higher
> latitudes because of rising atmospheric levels of carbon dioxide (CO2), a
> greenhouse gas. The warming reached a depth of about 10,000 feet (4,000
> meters), interfering with the normal circulation process in which colder
> surface water descends, taking oxygen and nutrients deep into the ocean.
>
> As a result, ocean waters became stratified with little oxygen, a condition
> that proved deadly to marine life. This in turn accelerated the warming,
> since marine organisms were no longer removing carbon dioxide from the
> atmosphere.
>
> "The implication of our study is that elevated CO2 is sufficient to lead to
> inhospitable conditions for marine life and excessively high temperatures
> over land would contribute to the demise of terrestrial life," the authors
> concluded in the article.
>
> The CCSM's simulations showed that ocean circulation was even more stagnant
> than previously thought. In addition, the research demonstrated the extent
> to which computer models can successfully simulate past climate events. The
> CCSM appeared to correctly capture key details of the late Permian,
> including increased ocean salinity and sea surface temperatures in the high
> latitudes that paleontologists believe were 14 degrees Fahrenheit (8 degrees
> Celsius) higher than present.
>
>

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