“Idiot. I will speak to Jim separately but I would advise him not to put his Easter eggs in a basket with you.”
So by your lame reasoning 4.6 ppmv * 0.5 degrees gives 2.3 PPM, which is a far cry from 100 PPM.
The reason is that Spencer multiplies this out by around 40 years so he gets
4.6 ppmv/degree/year * 0.5 degrees * 40 years = 92 PPM.
That’s why I said that he maintains this increase year on year to explain the 100 PPM change.
It really doesn’t matter that you can’t seem to grasp this. What matters is that the top-tier climate scientists understand the physics and chemistry. No way does Spencer’s theory explain the modern-day CO2 increase, unless you resort to JimD’s bookeeping fudge factor, which does a sleight-of-hand concerning where the excess CO2 is coming from.