THE FREYSNES WINDSTORM

• Main Authors: Ágústsson, Hálfdán; Háskóli Íslands, Bústaðavegi 9, 150 Reykjavík, Iceland; [e-mail], Ólafsson, Haraldur; Háskóli Íslands, Bústaðavegi 9, 150 Reykjavík, Iceland
• Format: Text
• Language: English
• Published: Croatian meteorological society; [e-mail] 2005
• Subjects: Downslope windstorm;wave breaking;corner wind; Iceland
• Online Access: http://hrcak.srce.hr/64690; http://hrcak.srce.hr/file/96962

Abstract: A devastating windstorm in SE-Iceland is studied with the help of observations from automatic weather stations and high-resolution simulations. In this windstorm there is at the same time a strong downslope acceleration of the flow and acceleration at the edge of the mountain. The downslope windstorm is associated with strong wave breaking below a reverse wind shear in the lower troposphere. The method of Brasseur is applied for calculating the gusts. In the downslope flow, the mean wind is underestimated by the model, but a high observed gust factor is reproduced in the calculations. In the corner wind, the mean wind is reproduced, but the gust factor is somewhat underestimated by the calculations.