Thank you for asking, My opinion is that we don't have a very reliable estimate of what our local climates will be like in 100 years and much less knowledge of what they will be like 200 years from now. Extrapolating poorly understood systems far into the future is a risky business.I have no idea what you are trying to say. I have already pointed out that in many living systems, going from 280 ppm to 380 ppm would kill you twice as fast, regardless of some trivial percent change equation. In the case of the earth, that sustained ppm difference in greenhouse gases in the atmosphere could mean a tiny 1 degree Celcius increase in MGT (Mean Global Temperature). Enough to completely change the repercussions that already under way: the landscape of the entire earth, extinctions, health issues to all living creatures in the food chain, etc. What is much worse, it puts us dangerously close if not on a path to runaway irreversible increases well beyond that 1 degree Celcius.
So your argument is that the earth will reach critical irreversible MGTs with catastrophic effects in 200 years instead of 100?
A reasonable, but not a safe, bet would be to look two hundred years back into the past, then look at today, compare climates, and assume that the variability we saw in the past 200 years will be similar to the variability we will see in the next two-hundred.
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