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Fig. 5.24 Normalised variances versus wind speed in three different heights (full line:80m,
dashed line:60m,dotted line: 40 m) from sonic data for neutral stratification at FINO1 in the
German Bight. Upper left: variance of longitudinal component wind component, upper right:
transverse component, below: vertical component
Fig. 5.25 Normalised variance of the longitudinal wind component as function of wave age and
thermal stability (diamonds: unstable, squares: neutral, crosses: stable) at 40 m height at FINO1
in the German Bight for the period July to December 2005. Only 40 m mean wind speeds
between 3.5 and 4.5 m/s have been considered. The regression line is plotted for unstable cases
only
medium wind speeds, the values for the horizontal components lie below the values
for flat onshore terrain. The three mentioned measurement heights of the FINO1
mast are probably above the well-mixed surface layer for this wind speed range.
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