Quote:
Originally Posted by DieselAddict
The same cannot be said of the rise in temps in the 2nd half of the 20th century. Increased CO2 is the only explanation.
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But it doesn't explain it. CO2 only accounts for about 3.8% of greenhouse gasses and humans are responsible for about 3.4% of all CO2 emitted into the atmosphere annually.
CO2 absorbs energy in a narrow bandwidth and absorbs it logarithmically and at some point, adding more won't change anything.
If the pre-industrial age CO2 density was 280 ppm, the first half of it's heating effect was caused by 20 ppm. The second half by 260 ppm. Most writing say this accounts for a 1.5 deg C rise in average temperatures. At this rate we would need a density of 9000 ppm to double the heating effect, to add another 1.5 deg C.
I don't think we'll get there.