Abstract
In the presentation we presented the findings of a study about mountain waves and terrain-induced turbulence at Sandnessjøen Airport Stokka. Several simulations were conducted for different free stream wind speeds with stably stratified atmosphere. The most important findings are summarised as following. Major characteristics of flow around an isolated hill described in literature and observed in laboratory experiments are successfully reproduced using numerical simulations. The simulations resulted in the identification of turbulent regions close to the airport and it could be concluded the the zones which were quite safe could turn dangerous for aviation activities depending upon the weather conditions (eg. wind speed and stratification). At low wind speed, the tendency of the flow to go around the mountain chain results in the propagation of tail winds at both the ends of the runway, thereby confirming observations at this site. There will hardly be any difference between the flight conditions at the existing runway and the site of the proposed runway. However, locating the runway in the northern part of the proposed line of the runway might slightly improve the flight conditions.