Evolution of the boundary layer - 6AM

Let's look at how the boundary layer evolves when larger-scale weather phenomena such as highs and lows are not creating large changes in the weather on a given day.....

6AM:

• radiation inversion in place - the region from the surface to the top of the radiation inversion is called the nocturnal boundary layer

• no thermal turbulence

• little/no mechanical turbulence since winds near surface are calm

• winds are calm near surface, increase in strength once you get above the radiation inversion