A method for spatial interpolation of wind climatologies

✍ Scribed by Morten Nielsen

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 374 KB
• Volume: 2
• Category: Article
• ISSN: 1095-4244
• DOI: 10.1002/(sici)1099-1824(199907/09)2:3<151::aid-we26>3.0.co;2-5

✦ Synopsis

The local wind climate is described by probability distributions for the wind direction and for the wind speed given a certain direction. As an alternative to the latter, the wind speed may be described by its statistical moments which are easily integrated over all directions. This allows representation of the wind climatology as a set of directionally independent statistics and the corresponding normalized directional distributions often called wind roses. The methodology is to spatially interpolate wind climatologies in an irregular mesh by two-dimensioanl third-order Be Âzier polynomials for the directionally independent statistics and linear interpolation for the wind roses. Local Be Âzier surfaces are set up in a patchwork of triangles and adjusted for approximate ®rst-order geometric continuity (GC 1 ) and minimal surface curvature. The wind rose interpolation is calculated relative to a typical local wind direction by means of Fourier transformation. A complementary surface extrapolation method is suggested which retains continuity on the grid boundary and asymptotically linear variation away from this. Copyright *