- The user is encouraged to consult the European Wind Atlas to view the original statistical data from which the
datasets were synthesised.
- It is important to emphasise that the datasets correspond to measured conditions at the named base station
without regard to wind direction, i.e. the terrain roughness at the site is considered isotropic.
- Adjusting the dataset for application at another site in the region of the base station requires that
at least the mean wind speed be scaled by an appropriate factor. This factor can be determined by applying
techniques described in the European Wind Atlas and implemented in the popular WAsP software
(Risų National Laboratory, Denmark). In general it is necessary to take into account sectoral terrain roughness,
orography and shelter at the new site.
- Approximate scaling of wind speed for varying height can be done using the well-known power law:
- W(z2) is the wind speed at a height 'z2' AGL
- W(z1) is the wind speed at anemometer height 'z1' AGL
- 'a' is an empirically determined parameter for a given site (often taken to have the value 1/7).
- AGL = above ground level