Sensible Heat Flux from the Earth’s Surface under Natural Convective Conditions

A value for the exchange speed of sensible heat CHU under natural convective conditions was determined by both indoor and field experiments. Regardless of the type of experiment, the relationships for the CHU were obtained as CHU = b(TS − T)1/3. For a wet surface, ΔTv should be substituted for (TS − T). Here, TS is the ground surface temperature, T the air temperature, and ΔTv the virtual temperature difference. In addition, b is a coefficient having a value of 0.0011 m s−1 K−1/3 for a smooth surface and 0.0038 m s−1 K−1/3 over a rough surface. From the field observation data, it was concluded that under strongly unstable conditions (−1 > ζ > −477) the best pair of stability profile functions was proposed.