Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japan Society of Steel Construction, Japan Society of Civil Engineering, Meteorological Society of Japan
Pages 9
In Japan, there are three famous local high winds, called “Kiyokawa-dashi”, “Hiroto-kaze” and “Yamaji-kaze”. They are mechanically induced local high winds due to the topography. Last two winds are known as “downslope-wind” caused by upwind high mountains. In the present study, “Hiroto-kaze” and “Yamaji-kaze” were analyzed based on in-situ measurements including mountain-top data. It is found that typical downslope wind appears as “step-wise” time series, which suggests a critical meteorological condition. During the local high winds, potential temperatures of foot and top of the mountain shows almost same values, which supports the downslope-wind. Local surface pressure depression at the foot of the mountain was observed, which suggests the hydraulic jump.
