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Originally Posted by TheEnemy
James, Neil
Just out of curiosity could each of you answer a few questions of mine.
1. How high do you think the CO2 levels will get?
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Above 1500-2000 ppm. As Neil points out, after a certain point we're likely to get into feedbacks, as natural sources like Arctic methane are released.
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2. How much hotter will the earth become? Include some details if you can.
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15-20 degrees, enough to shut down both C3 & C4 photosynthesis in most of the tropics (at least). C3 (which the vast majority of plants use) shuts down at around 105F IIRC, C4 around 140F:
C4 carbon fixation - Wikipedia, the free encyclopedia
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3. How high do you think the oceans will rise?
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I think the conventional number is about 200-300 ft, but really, that's going to be the least of our problems.
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4. How much more acidic do you think the oceans will become?
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Don't really know enough to have an opinion.
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5. In general how bad do you think it will become on this planet?
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Similar to the Permian-Triassic extinction. Most vertebrate life (including humans) will become extinct, along with many plants. See e.g.
http://en.wikipedia.org/wiki/Permian...tinction_event