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Fig. 3.10 Diurnal variation of wind speed at different heights (55, 85, 145 and 205 m) above
ground from SODAR observations over a flat rural area
Fig. 3.11 Mean monthly vertical wind profiles from SODAR measurements for daytime (thin
full line) and for night-time (dashed line) over the city of Hannover (Germany) in April 2003
with k A as the measured shape parameter at the height z A , z ref = 10 m, and
c = 0.088. Justus et al. ( 1978 ) were principally aware of the possible existence of
a maximum in the k-profile but assumed that this maximum would occur at heights
above 100 m. Later Allnoch ( 1992 ) proposed to put c = 0.19 and z ref = 18 m in
order to better represent the slope of the k-profile at the top of the surface layer.
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