GEOB 300 - The wind profile under neutral conditions.

This applet illustrates how the vertical profile of horizontal wind changes with shear stress (expressed as friction velocity u_*) and with roughness (expressed as roughness length z₀). We are modelling the profile using the logarithmic wind law for neutral conditions:

The left graph shows the wind profile on a linear-linear scale, the right graph displays the same data but drawn on a linaer-log scale.

Friction velocity u_* (m s^-2): 0.5 0.4 0.3 0.2 0.1

Roughness length z₀ (m): 1 (e.g. mature forest) 0.1 (e.g. crop) 0.01 (e.g. short grass) 0.001 (e.g. bare soil) 0.0001 (e.g. water)