This document describes the release, the bug fixes and other changes made.
We've made some changes to the WAsP algorithms so as to improve the correspondence between the program code and the European Wind Atlas method. The code dealing with unstable stability corrections has been revised.
These changes may affect the results of some previously calculated projects. The projects most likely to be affected are ones in near-shore flat terrain and offshore, where the turbine hub height is considerably higher than the meteorological mast. Similarly, projects where the average stability conditions have been changed by the user to reflect unstable conditions may be affected.
In all other cases, the differences in results will be insignificant.
Updated versions of WAsP 8 (version 8.4) and WAsP 9 (version 9.1), which include this new implementation are now available. We recommend that you download and install the new version.