台風域内の強風と地形との間の統計的関係についての一考察

Abstract

The statistical relationship between the surface and gradient winds in a typhoon inrelation to the surrounding topography is studied. The gradient wind is computed from thepressure profile of the past destructive typhoons, which is represented with the Schloemer'sformula. The ratio, Rv, of the surface wind speed, Vs, to the gradient wind speed, Vgr, iscomputed for wind directions and compared with the topography surrounding the weatherstation. The topography is represented by the standard deviation, on, of altitude, h, of theground surface in the windward direction, weighted for the distance from the station.It is found that Rv can be approximated as exponentially decreasing with on.