Contrary to all the BS being spewed by top climate scientists, their own models shows that CO2 has almost no impact on climate. The graph below shows the greenhouse effect during mid-latitude summer for three scenarios, calculated using RRTM – the model used by NCAR in their climate and weather models
- Current atmosphere
- No CO2
- Double CO2
(Note the mid-troposphere hot spot)
At the surface during mid-latitude summers, the amount of downwelling longwave radiation due to CO2 is less than 3%. Doubling CO2 would only increase the greenhouse effect by one third of one percent. Yet climate scientists blame mid-latitude summer heatwaves on this.
We constantly hear BS from people like Gavin claiming that the CO2 contributes 20-30% to the greenhouse effect, but their own models show this is complete nonsense.
Call this scam off – there is no science behind it.
The effect is higher during high latitude winters, where there is very little water vapor.
[UPDATED] I added high latitude winters at Tallbloke’s request. The proportional effect is larger there, because of a shortage of water vapor.
In the tropics, the CO2 proportion of the greenhouse effect is less than 1.5% – and a doubling of CO2 has almost no effect.