Cluster Analysis Of Wind Fields In Complex Terrain
Free (open access)
P. Kaufmann & R.O. Weber
AbstractCluster analysis of wind fields in complex terrain P. Kaufmann, R.O. Weber PW 6c6errer fnsfzWe, C#-&22 F^em f ^7, Switzerland ABSTRACT A new method for automated classification of regional scale wind fields is pro- posed. The classification scheme makes use of observed data only and does not require interpolation to a regular grid. It is applied to data from the REKLIP / MISTRAL project. The obtained grouping of the wind fields from a one year period reflects diurnal and seasonal variations of air flow in complex terrain. INTRODUCTION Automated classification schemes for wind fields on a synoptic scale have been developed for air pollution studies, e.g. by Fernau and Samson  and by Dorling et al. . A similar method for the regional scale has been presented in Gassmann et al. . Al of these schemes work along the following lines: A wind field is estimated on a regular grid, as in Gassmann et al.  by a diag- nostic wind field model (Moussiopoulos et al.