I wonder if you know what the mass of the atmosphere is and how it slows the release of heat... it is MASS...Down-welling radiation does it not the nitrogen. And IF you were cognizant of atmospheric mass you would know why that 100,000 number is important.Explain how a 100% nitrogen atmosphere warms the surface first. Then we can move on to adding CO2. And why you think 100,000 ppm is a special number.
How does a 100% Nitrogen atmosphere cause the average surface temperature to be warmer than without an atmosphere? The answer is not downwelling radiation.
Still waiting
That is a good start. Could you flesh out a few of the details? I am particularly interested in hearing about how 10% is a special number.
You seemed to have abandoned this thread.
Are you having a hard time trying to explain how 'MASS' slows the cooling? Do you need some help?