Radix layer

radix layer

The bottom fifth of the convective atmospheric boundary layer where virtual potential temperature, wind speed, and humidity vertical gradients are nonzero.

A convective boundary layer comprises three layers: the radix layer touching the ground, a uniform layer in the interior of the convective boundary layer, and an entrainment zone at the top. The classical surface layer, where Monin–Obukhov similarity theory applies to small shear- driven turbulent eddies, is a bottom subdomain of the radix layer.

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1. The layer of fluid near a boundary that is affected by friction against that boundary surface, and possibly by transport of heat and other variables across that surface.