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AAdmin 
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(8/11/07 5:15 am)
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Could humans recreate Permian-like extinction?-IPT

Could humans intensify speed of global warming to a point where Permian like extinction might be repeated?

On Permian event bellow..

I was watching recently science channel and there there was an episode that was centered on Permian era extinction (known also as "Day when the earth nearly died"). Basic idea was that during Permian era (around 250 million years ago) there probably was a meteorite impact but not big enough to be contributed as the main factor in the extinction of over 90% of life species at the time. It is believed that the meteorite that would have caused such an event would have to be at least the size of Manhattan (NYC) while the actual size of the related meteorite would have been noticeably smaller to be attributed as a direct cause of such an event. But what was caused was that temperatures increased to a certain level which in fact released some of the methane (which is most potent green house gas known to man stored in the depths of oceans and kept there in semi frozen state thanks to the current temperature levels) which in turn further increased global temperatures. This in turn released heavy amounts of methane. It appears that the extinction lasted much longer then anyone thought (upwards of incredible 80,000 years). Afterworlds it took the planet 100,000 years to recover.

more on this subject and related

en.wikipedia.org/wiki/Permian-Triassic_extinction_event en.wikipedia.org/wiki/Permian#Permian-Triassic_extinction_event
en.wikipedia.org/wiki/Extinction_event#Clathrate_gun_hypothesis
www.dcn.davis.ca.us/go/dorritie/methane%20catastrophe.html

also interesting an read

Are humans Gaia's immune system?
www.reason.com/news/show/34850.html


Question is is there a possibility that humans might create such conditions where not only their own existence is in question but that of much of life forms contained within our blue planet (like it occurred in Permian event)?
Humans could recreate Permian-like extinction
I doubt this will be caused by humans
Humans have no impact on the environment
There is no such thing as a global warming
I haven no opinion on this subject

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AAdmin 
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(8/11/07 5:16 am)
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Re: Could humans recreate Permian-like extinction?-IPT
AAdmin: This is now an IPT thread which means it will move eventually through all major illyria forums. Strict IPT rules!

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AAdmin 
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(8/11/07 5:20 am)
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Re: Could humans recreate Permian-like extinction?-IPT
related article

Global warming may have triggered worst mass extinction

news.mongabay.com/2005/0829-permian_triassic.html
Quote:

Global warming may have triggered worst mass extinction
mongabay.com, National Center for Atmospheric Research release
August 29, 2005


SUMMARY: A dramatic rise in carbon dioxide 250 million years ago may have caused global temperatures to soar and result in Earth's greatest mass extinction, according to a study published in the September issue of Geology. Global warming, which may have produced temperatures 10 to 30 degrees Celsius higher than today, would have had a significant impact both on oceans, where about 95% of lifeforms became extinct, and on land, where almost 75% of species died out.


Quote:
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.



Quote:

"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.

Quote:

Methane hydrate gasification

In 2002, a BBC2 'Horizon' documentary, 'The Day the Earth Almost Died' summarized some recent findings and speculation concerning the Permian extinction event. Paul Wignall examined Permian strata in Greenland, where the rock layers devoid of marine life are tens of meters thick. With such an expanded scale, he could judge the timing of deposition more accurately and ascertained that the entire extinction lasted merely 80,000 years and showed three distinctive phases in the plant and animal fossils they contained. The extinction appeared to kill land and marine life selectively at different times. Two periods of extinctions of terrestrial life were separated by a brief, sharp, almost total extinction of marine life. Such a process seemed too long, however, to be accounted for by a meteorite strike. His best clue was the carbon isotope balance in the rock, which showed an increase in carbon-12 over time. The standard explanation for such a spike – rotting vegetation – seemed insufficient.

Geologist Gerry Dickens suggested that the increased carbon-12 could have been rapidly released by upwellings of frozen methane hydrate from the seabeds. Experiments to assess how large a rise in deep sea temperature would be required to gasify solid methane hydrate suggested that a rise of 5°C would be sufficient. Released from the pressures of the ocean depths, methane hydrate expands to create huge volumes of methane gas, one of the most powerful of the greenhouse gases. The resulting additional 5°C rise in average temperatures would have been sufficient to kill off most of the life on earth.

Sudden release of methane hydrate has also been hypothesized as a cause of the Paleocene-Eocene Thermal Maximum extinction event.

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Edited by: AAdmin  at: 8/16/07 6:25 am
Fender666 
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Posts: 4027
(8/11/07 5:57 am)
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Re: Could humans recreate Permian-like extinction?-IPT
What can I say but we humans are the masters of our own construction and destruction.



Started out, just drinkin' beer
I didn't know how or why
Or what I was doin' there
Just a couple more
Made me feel a little better
Believe me when I tell you
It was nothin' to do with the letter

I ran right out of beer
I took a look into the larder
No bones, nothin'
I'd better go and get somethin' harder
Back in a flash
I started on a dash of Jamaica rum
Me and Pat Malone
Drinking on our ow-ow-ow-own

Woh-hoh-oh, the nips are gettin' bigger
Woh-yeah, the nips are gettin' bigger
Wo-hoh-oh, the nips are gettin' bigger
Yeah-eah-eah, mmm they're gettin' bigger

Sometimes I wonder
What all these chemicals
Are doin' to my brain
Doesn't worry me enough
To stop me from doin' it agai-ai-ain
Wipin' out brain cells
By the millions but I don't care
It doesn't worry me
Even though
I ain't got a lot to spare-are-are

Woh-hoh-oh, the nips are gettin' bigger
Woh-yeah-eah, the nips are gettin' bigger
Wo-hoh-oh, the nips are gettin' bigger
Yeah-eah-eah, they're gettin' bigger




AAdmin 
Forum Emperor!(Balkan Papa)
Posts: 5704
(8/16/07 6:25 am)
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Re: Could humans recreate Permian-like extinction?-IPT
Moving to BiH forum.
----
Moving to Cro. forum.
-----
Moving to Greece Forum.
-----
Moving to Alb. Forum.
-----
Moving to Ro. Forum.

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Edited by: AAdmin  at: 8/27/07 5:42 pm
Boz429 
Senior Moderator
Posts: 4521
(8/16/07 2:22 pm)
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Re: Could humans recreate Permian-like extinction?-IPT
I don't think this could be caused by humans. Global Warming is a part of Earths natural cycle. There are other factors that contribute to it significantly more then humans.

asmir biscanin
Amicus
Posts: 260
(8/19/07 10:59 am)
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Re: Could humans recreate Permian-like extinction?-IPT

i voted the first option

Edited by: asmir biscanin at: 8/19/07 11:00 am
leshte
Amicus
Posts: 1810
(8/26/07 7:01 pm)
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Re: Could humans recreate Permian-like extinction?-IPT
Yes, if we keep using fossil fuels. On the other side extinction will solve the problems of ethnic cleansing once and for all.:hat

Edited by: AAdmin  at: 8/27/07 5:41 pm
Contele de Monte Cristo
Moderator
Posts: 250
(8/27/07 7:37 pm)
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Re: Could humans recreate Permian-like extinction?-IPT
I have to think about it more..:)

JannissaryofByzantium
Commanding Moderator
Posts: 4682
(8/29/07 11:38 am)
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Re: Could humans recreate Permian-like extinction?-IPT
Side effects of the Human civilization could result in extinction for many species including themselves.

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