Because of increasing energy demand worldwide and the willingness to reduce greenhouse gasemissions, renewable energies, such as wind energy, are rapidly growing: The global cumulative installed capacity of wind energy increased from 6 GW in 1996 to 318 GW in 2013 and is expected to reach 596 GW in 2018 [1]. Planning a new wind farm begins with the search for a suitable location. Besides suitable surface conditions and legal aspects, geographical wind conditions and timing are also important. There are many studies which pertain to deriving detailed long-term wind speed maps for individual countries (e.g., U.S. [2] and Germany [3]). These maps of long-term average wind speeds are a rough indicator for average local wind conditions, but they are inadequate for deriving the expected wind energy production because of the non-linear relationship between wind speed and production
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