South Baltic Wind Atlas
An important issue when planning offshore wind projects is to know the wind resource which – next to environment and social acceptance, grid connection, project economy and political support – is one of the five cornerstones of wind farm planning.
Thus, within the framework of the project a first version of a wind atlas for the South Baltic Sea has been developed using the WRF (Weather Research and Forecasting) mesoscale model and verified by data from tall Danish and German masts. Six different boundary-layer parameterization schemes were evaluated by comparing the WRF results to the observed wind profiles at the masts. The WRF modeling was done in a nested domain of high spatial resolution for four years. In addition the long-term wind statistics using the NCAR-NCEP reanalysis data were performed during 30 years to provide basis for a long-term adjustment of the results, and the final WRF results include a weighting for the long-term trends variability in the South Baltic Sea. Observations from earth observing satellites were used to evaluate the spatial resolution of the WRF model results near the surface. The QuikSCAT and the WRF results compared well whereas the Envisat ASAR mean wind map showed some variation to the others. The long-term analysis revealed that the South Baltic Sea has a spatially highly variable wind climate during the 30 years.