[HPsquared]

That's a bit like the atmosphere.

At low altitudes, temperature reduces with height (in daytime the atmosphere is heated by contact with the hot surface of the earth (as the atmosphere itself doesn't really get heated by the sun). The hot air rises, and expands as it ascends (pressure reduces as you climb, less air pushing down from above) and therefore cools (adiabatic expansion). Therefore, in the troposphere at least, temperature reduces with altitude due to all this vertical air movement and heating from below.

This is contrasted with the stratosphere, where the temperature begins to rise with altitude again and therefore is very stable and stratified without much vertical air movement.

Somewhat different physics at play, but funny how there are similarities.