Bzzzz...239.7 means W/m2, not -18C.
F'ing moron...are you unaware that you can run that 239.7 through the SB equation and find out what the radiating temperature is for something that is radiating at that wm2?....clearly not...an object radiating at 239.7wm2 has a radiating temperature of -18 degrees....you people are proving your ignorance beyond any shadow of a doubt...
The surface receives 239.7 W/m2 from the Sun and 239.7 W/m2 from the atmosphere (back radiation).
Those 2 inputs result in the surface temperature of about 29C.
Right...except what you aren't getting is that according to the model...the earth is radiating upwards at -18 degrees and the atmosphere is radiating downwards at -18 degrees...two inputs of -18 degrees can never result in a radiating temperature of more than -18 degrees...and certainly not a temperature of 48 degrees warmer than either..
Now that I've pointed out your confused understanding, explain how those pesky photons from the Sun travel through the hotter corona.
All you have pointed out is that you don't have a clue and can't read even the simplest of equations and had no idea that the wm2 output of a radiator equals a radiating temperature....