Home Discussion Forum If you drew a boundary, say the surface of the earth, is...

# If you drew a boundary, say the surface of the earth, is there a net energy influx or a net energy output?

I think that the earth is radiating significant heat. How much heat (trillions of gigajoules per second) If I am wrong, how?
Joseph:
Are you saying that all of the heat in the core and mantle of the earth is collected from the sun? This seems counter-intuitve when the core is actually hotter than the surface.

1. The Earth is absorbing “significant heat” from the Sun, that’s where all the energy comes from to sustain & promote life…

2. The Earth receives a lot of energy from the Sun, but is a net radiator of energy to space due to cooling of the interior core.
The core-to-space heat flux is relatively small compared to the solar input. The core heat flux is around 44 tera-watts (4.4×10^13 watts).
http://www.phys.hawaii.edu/~sdye/doanow_talks/Lassiter%20DOANOW%20presentation.ppt
In contrast, the solar flux to the Earth is around 1365 watts/m^2 at the top of the atmosphere on average and that implies a global energy input of 1.1×10^18 watts, or almost five orders of magnitude more. Even if you use only the shortwave solar energy flux to the Earth’s surface (around 350 watts/m^2) the solar input dwarfs the geologic cooling.

3. The Earth receives a lot of energy from the Sun, but is a net radiator of energy to space due to cooling of the interior core.
The core-to-space heat flux is relatively small compared to the solar input. The core heat flux is around 44 tera-watts (4.4×10^13 watts).
http://www.phys.hawaii.edu/~sdye/doanow_
In contrast, the solar flux to the Earth is around 1365 watts/m^2 at the top of the atmosphere on average and that implies a global energy input of 1.1×10^18 watts, or almost five orders of magnitude more. Even if you use only the shortwave solar energy flux to the Earth’s surface (around 350 watts/m^2) the solar input dwarfs the geologic cooling.

41

6

3

14

5