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clock Created with Sketch. 18/06/19
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Originally posted by szaba_the_hut:
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No they dont "trap" heat as such. They absorb and re-radiate specific frequencies of long wave radiation in random directions. It therefore increases the time taken for the specific frequency radiation to migrate to space but the impact of a unit of additional GHG diminishes as the concentration increases (it is asymtotic). This is why the IPCC express climate sensitivity to CO2 as degrees C per doubling of concentration. IPCC estimate climate sensitivity between 0 and 6 degrees C per doubling of CO2 with the likely range between 1.5 and 4 although they have reduced sensitivity in each iteration of the AR climate report......
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In this report from Dr Judith Curry she says the sensitivity is now even lower......https://www.youtube.com/watch?v=SBjFjSZjv6w
