Extreme Global Warming kills off 95% of life

One key factor behind this disaster was probably catastrophic volcanic activity in what is now Siberia that spewed out as much as 2.7 million square miles (7 million square kilometers) of lava, an area nearly as large as Australia.
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Hydrogen Sulfide! The Siberian Traps eruptions, research dates them to 251.2 ± 0.3 Ma

otherwise plants would have thrived in an warm atmosphere with a high level of carbon dioxide.

The Permian–Triassic extinction event was the only known mass extinction of insects.
 
has anyone checked the CO2 levels at faux news?

:lol:
 
faethor said:
600ppm CO2 is when human decision making starts being impared.
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320–530 ppm H2S leads to pulmonary edema with the possibility of death.
530–1000 ppm H2S causes stimulation of central nervous system leading to loss of breathing.
800 ppm H2S is a lethal dose in mammals, 50% die in 5 min
 
gee - I distinctly remember some coal industry shills telling us, not too long ago that anything that exists in parts per million measures can't have any effect on anything. Case in point, members of Congress exist in the US at a concentration of less than 2ppm so why do people get so excited about the colours of their ties?
As to hydrogen sulphide, it is natural and an essential food to many bacteria.
 
@Metalman,
Appreciate your idea of H2S. However volcanic ash clouds block the sun and cool the earth The evidence appears to be a hotter planet. Also, how does H2S impact the ratio of Oxygen istoypes and therefore seashell composition? Though if you are going to answer that please quote the Scientific Research so I can read it. Thanks.
 
http://s17.postimage.org/5zpwzyvcv/Permian_Extinction.png

During the hottest periods of Pangea (265 Mya just before the extinction) temperatures rose to +10.0C and it probably got too hot for complex life in the Paleo-Thethys sea on the eastern side of Pangea.

A big part of this is the configuration of the Pangaea continent at the time. There was large and relatively shallow, enclosed sea on the western side of the then very large Pacific at the time. A basin that would reach relatively high water temperatures similar to the gulf of Mexico, but with no way to transport excess heat to the poles. In the Persian Gulf sea surface temperatures of up to 36 degrees have been measured, and land temperatures in the area have exceeded 50 degrees, so it’s not all that different.

The Permian Extinction, happened later when global temperatures fell by up to 8.0C, caused by the Siberian Traps volcanoes and causing a 30 million year ice age.

http://phys.org/news/2012-10-geochemical-analysis-chinese-permian-triassic-mass.html
http://geology.gsapubs.org/content/40/11/963.abstract
http://www.sciencedirect.com/science/article/pii/S0012821X03003479
http://geology.gsapubs.org/content/33/5/397.full.pdf

Strange thing is, historical records of CO2 concentrations which show a sharp increase 250 millions years ago do not suggest any sharp decrease 5 millions years later. Apparently Earth somehow managed to recover without CO2 concentrations reduced.
http://en.wikipedia.org/wiki/File:Phanerozoic_Carbon_Dioxide.png

and linking Oxygen isotopes in bones to temperature is flawed
https://dl.dropbox.com/u/22026080/non-calor-sed-umor.pdf
 
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