You’ve probably heard it before: the geothermal heat flux is so small (91.6 mW/m²) that it can be effectively ignored in Earth’s energy budget. The first part is true, the heat flux is small, but this fact is completely irrelevant. And what is relevant is popularly denied and masked as something else.
CF (Conductive Flux) is the Geothermal Heat Flux, EF is the Emergent Geothermal Flux, Th and Tc are the temperatures of the hot side and cold side. d is depth. Compatibility with my previous terminology: CF = CHF and EF = CSR.
As you can see all of these profiles have the same geothermal heat flux (CF), and all of them produce a very different emergent flux (EF) out of the surface. The popularly stated geothermal heat flux is NOT a value that you can compare to insolation. The value itself gives you NO clue as to what can emerge at the top. Anyone telling you otherwise is stupid or lying.
The geothermal heat flux and the thermal conductivity factor determines the temperature gradient. A gradient can never tell you either what kinetic energy is at the bottom or the top. Never.
So what really emerges at the top on Earth? In this visualization, the closest answer is ~5°C or ~340 W/m² – what was calculated and observed here and here. ~340 W/m² is what is claimed for the total greenhouse gas backradiation effect, as shown in the “official” energy budget here. That’s not surprising, because the greenhouse gas effect is secretly just geothermal flipped upside down. It’s the biggest scam in climate science, and you heard it here first.
Geothermal provides a tremendous amount of energy, even more than the sun, but climate scientists ignore it because they are looking at a component of a gradient/slope measure, rather than the temperature (kinetic energy) it delivers to the surface.
I invite everyone to give this some serious thought and not just dismiss it using sophistry.
- Geothermal Heat Flux (CF) is a very useful value for commercial geothermal energy prospectors, but not for atmospheric scientists creating an energy budget. EF is what they need to use. They do use it, but they flip it upside down and call it GHE.
- The temperature gradient value used is 27.5 °C/km, which I got from here: “it is about 25–30 °C/km”. This makes k = 0.333 W/(m*K).