Milton Banana wrote:
I have some questions about this Global Energy Budget. Every measurement is in Watts per square meter. 341 of shortwave radiation comes in. 102 of the shortwave is reflected back out. 239 IR going out. All outgoing adds up to 341. What comes in goes out. That makes sense. Here’s where things get a little muddy in my mind. 161 Wm^2 absorbed by the surface. But the surface releases almost twice the (356) watts per square meter of IR.
And has 333 in total back radiation to the surface from the atmosphere.
How is that possible? 356 Wm^2 is above the measured amount of shortwave radiation coming in from the Sun hence my last question in the post proceeding. "Is there another source of heat other than the Sun?"
It is part of a heat cycle. The ground radiates, the atmosphere radiates back, the ground radiates, the atmospere radiates back, and so on. The depiction is an average day and thus does not show just the total in and out, but the cycle of energy within the day.
Another question. Almost 100 percent of that release is back radiated 333 Wm^2.
How is it possible that according to this study the atmosphere (CO2?) is back radiating almost 100 percent of IR?
All of the GHGs and clouds are included. It is ~84% of the IR and that is how the planet remains warmer than it would without the Greenhouse Effect. It still leaves 40+ W m^2 which can be added to the retained energy, which is no small amount.