SSDD
Gold Member
- Nov 6, 2012
- 16,672
- 1,966
- 280
For as long as I have been here, the PT extinction has been periodically held up as an example of a run away greenhouse effect killing off most of the life on the planet. Thinking people know this isn't true as the atmospheric CO2 levels had previously been much higher than they were during the period of transition between the Permian and the Triassic periods without any such run away greenhouse effect, but then aren't thinkers...they are alarmists...
Here are some examples of statements made on this board regarding the PT extinction event...and there have been many...
Anyway, somehow in today's bitterly partisan scientific environment, some actual science slipped past the gatekeepers, and it seems that that PT extinction wasn't due to a run away greenhouse effect, and very high temperatures at all....it was due to an ice age. All thinking people know that cold is the real killer.. Life on earth has always flourished during periods of warmth exceeding the present by a wide margin...cold, on the other hand makes life very hard...but then again, alarmists aren't thinkers...they are political hacks who will say whatever they think is necessary to scare people who don't agree with them whether it makes sense or not.
https://www.sciencedaily.com/releases/2017/03/170306091927.htm
Cold extermination: One of greatest mass extinctions was due to an ice age and not to Earth's warming
The Earth has known several mass extinctions over the course of its history. One of the most important happened at the Permian-Triassic boundary 250 million years ago. Over 95% of marine species disappeared and, up until now, scientists have linked this extinction to a significant rise in Earth temperatures. But researchers have now discovered that this extinction took place during a short ice age which preceded the global climate warming. It's the first time that the various stages of a mass extinction have been accurately understood and that scientists have been able to assess the major role played by volcanic explosions in these climate processes.
Ice age, not warming, explains Permian-Triassic extinction event
Ice age, not warming, explains Permian-Triassic extinction event
The ice age lasted just 80,000 years, but the extreme cold was enough to kill off the majority of marine species.
https://www.princeton.edu/geosciences/people/schoene/pdf/7. Schaltegger_EPSL08.pdf
Precise U–Pb age constraints for end-Triassic mass extinction, its correlation to volcanism and Hettangian post-extinction recovery
Here are some examples of statements made on this board regarding the PT extinction event...and there have been many...
Now there are a many more papers confirming the very rapid rise during the PT Extinction Event. Very easy to find, just use Google Scholar, and put in "Evidence for the increase of GHGs during the PT Extinction Event". What a shame that an old millwright has to teach this to a supposedly educated man.
There are a number of times in the geological history of the earth that a waming became selfsustaining, the PT extinction was just one of them.
The record of the Milankovic Cycles show that. The longer geological record shows that rapidly adding GHGs to the atmosphere creates a very rapid warming, and that very rapid warming creates extinction events. PT event, as well as others.
Lordy, lordy, faux geologist, you are one dumb fuck. PT Extinction.
Anyway, somehow in today's bitterly partisan scientific environment, some actual science slipped past the gatekeepers, and it seems that that PT extinction wasn't due to a run away greenhouse effect, and very high temperatures at all....it was due to an ice age. All thinking people know that cold is the real killer.. Life on earth has always flourished during periods of warmth exceeding the present by a wide margin...cold, on the other hand makes life very hard...but then again, alarmists aren't thinkers...they are political hacks who will say whatever they think is necessary to scare people who don't agree with them whether it makes sense or not.
https://www.sciencedaily.com/releases/2017/03/170306091927.htm
Cold extermination: One of greatest mass extinctions was due to an ice age and not to Earth's warming
The Earth has known several mass extinctions over the course of its history. One of the most important happened at the Permian-Triassic boundary 250 million years ago. Over 95% of marine species disappeared and, up until now, scientists have linked this extinction to a significant rise in Earth temperatures. But researchers have now discovered that this extinction took place during a short ice age which preceded the global climate warming. It's the first time that the various stages of a mass extinction have been accurately understood and that scientists have been able to assess the major role played by volcanic explosions in these climate processes.
Ice age, not warming, explains Permian-Triassic extinction event
Ice age, not warming, explains Permian-Triassic extinction event
The ice age lasted just 80,000 years, but the extreme cold was enough to kill off the majority of marine species.
https://www.princeton.edu/geosciences/people/schoene/pdf/7. Schaltegger_EPSL08.pdf
Precise U–Pb age constraints for end-Triassic mass extinction, its correlation to volcanism and Hettangian post-extinction recovery