Variation in wind speed

Wind conditions and wind energy production vary from year to year.

The average period as well as the Max and Min months have been selected by studying the average wind conditions over the whole country, instead of using wind conditions in each grid point, during the period of 1989-2007 (more in Chapter: selection of the reference period)

Monthly variations UMax- UAverage and UAverage- UMin given in percentage (%) are calculated for each month at all heights in each 2,5x2,5 square kilometer grid (see the detailed maps). The average annual difference is calculated as a weighted average of selected months average.



Calculated annual difference (in %) in wind speed at 100 m height between a windy year (maximum speed) and the average Wind Atlas year.



Calculated annual difference (in %) in wind speed at 100 m height between a less windy year (minimum speed) and the average Wind Atlas year.