- Joined
- Dec 22, 2012
- Messages
- 82,094
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- Location
- Portlandia
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- Male
- Political Leaning
- Libertarian - Right
We know the mechanism (global warming gasses) and we've measured the effect (in atmosphere and oceans.) We're forcing climate change, and to think otherwise is worse than hubris: it's denialism.
You are in scientific denial.
It is true that the sensitivity of CO2 would increase the planets warmth by 1.2 C for a doubling if all other variables remained stable, according to the science. Your camp suggest that positive feedback increases this farther. However, there are negative feedbacks as well.
Now to get to any dangerous levels caused by CO2, the feedback would have to exceed unity. When a feedback of any system exceeds unity, it goes into a runaway condition. If this is true, that the climate feedback exceeds unity, then one of two things are true, and mutually excursive. And would happen without our added CO2.
1. The earth would have a Venus like condition.
2. There is a hard-stop and we have reached it. We are at a maximum level that the earth can warm with the solar forcing we have. I believe this may be true, as in all past inter-glacial periods, they have stayed within a four degree range.

