This work aims to study the seasonal difference in normalized wind speed
above the surface layer as it is observed at the 160 m high mast at the
coastal site Høvsøre at winds from the sea (westerly).
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Normalized and stability averaged wind speeds above the surface layer are
observed to be 20 to 50% larger in the winter/spring seasons compared to
the summer/autumn seasons at winds from west within the same atmospheric
stability class.
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A method combining the mesoscale model, COAMPS, and observations of the
surface stability of the marine boundary layer is presented. The objective
of the method is to reconstruct the seasonal signal in normalized wind speed
and identify the physical process behind. The method proved reasonably
successful in capturing the relative difference in wind speed between
seasons, indicating that the simulated physical processes are likely
candidates to the observed seasonal signal in normalized wind speed