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The 0.6 °C (doubling of CO2) number is not all that crazy when you consider the long term effects of CO2LOL...
This thread isn't very long yet. It's post 24.
LOL
Simulations including an increased solar activity over the last century give a CO2 initiated warming of 0.2 °C and a solar influence of 0.54 °C over this period, corresponding to a CO2 climate sensitivity of 0.6 °C (doubling of CO2) and a solar sensitivity of 0.5 °C (0.1 % increase of the solar constant).
Like ikt or not, it is a peer reviewed paper that disagrees with what the activists say.
confined by the basics of the greenhouse effect.
Taking the Measure of the Greenhouse Effect
The size of the greenhouse effect is often estimated as being the difference between the actual global surface temperature
and the temperature the planet would be without any atmospheric absorption, but with exactly the same planetary albedo, around 33°C.
Taken together all the CO2 since earth had an atmosphere, has caused 6.6°C of total equalized warming.We find that water vapor is the dominant substance — responsible for about 50% of the absorption,
with clouds responsible for about 25% —
and CO2 responsible for 20% of the effect.
If we count doubling s between 1 ppm and 280 ppm, we get 8.09 doubling s.
This would mean that each historic doubling of CO2, contributed at most, 0.82°C of warming.
I know this is not the same as the above mentioned 0.6°C, but it is much closer than the predicted 3.0°C!