Maybe not a greenhouse effect after all? « The HabitableZone

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Maybe not a greenhouse effect after all? May 1, 2012 7:12 pm ER

Could the Permian extinction (95% of all marine species,252 million years ago) been the result of ocean acidity levels provoked by volcanic activity?

http://www.nytimes.com/2012/05/01/science/new-studies-of-permian-extinction-shed-light-on-the-great-dying.html

Atmospheric CO2 levels monitored at Mauna Loa Observatory, over the last half-century:

http://www.esrl.noaa.gov/gmd/ccgg/trends/

Ancient CO2 levels by TB 2012-05-01 19:32:22
- I can correlate for ya it right here. by ER 2012-05-01 20:26:35
- And no human beings, cultures and civilizations existed then. by bowser 2012-05-01 19:50:54
  - The question is why these much higher CO2 levels didn't make the oceans a lot more hostile to life 500 million years ago than during the Great Extinction? by TB 2012-05-01 20:06:30
    - You're right, I'm left (she's gone). Elvis Presley by bowser 2012-05-01 20:43:11
    - The answer to your question... by ER 2012-05-01 20:34:55
      - PS by ER 2012-05-01 20:44:21