Some people might think that we’ve already talked about this
topic enough, but we know better.
In the last two posts, we talked about how temperature
fluctuations at the surface of the ground might affect the underground
temperature, and specifically, how deeply those fluctuations might penetrate.
So, now imagine that there might be an application where it
wasn’t the surface temperature nor the ground temperature that mattered, but
the difference between the two. (This
actually is important for certain applications that propose to use that
temperature difference to generate small amounts of electricity).
