บุษกร คงเอียด. A Parametric Tropical Cyclone Wind Model for Thailand. Master's Degree(Applied Mathematics). King Mongkut's University of Technology Thonburi. : King Mongkut's University of Technology Thonburi, 2005.
A Parametric Tropical Cyclone Wind Model for Thailand
Abstract:
In this research a model for estimation of tropical cyclone wind speed is developed. The model is based on Hollands model which estimates wind speed at 10m from minimum pressure at storm center, environment pressure, radius of maximum wind speed, and wind-shape parameter. Translation vector of the storm is included in the proposed model to obtain asymmetric wind model which provide better wind pattern around tropical cyclone. Several experiments are performed to investigate sensitivity of the asymmetric model to the following parameters; wind-shape parameter, radius of maximum wind speed, and environment pressure. The asymmetric wind model is further enhanced by adding the effect of surface friction through parameterization with roughness length. This is asymmetric boundary layer gradient (ABLG) wind model. The ABLG model is tested with observation data of the strongest tropical cyclone that ever move into Thailand, typhoon GAY of the year 1989. The model with surface friction
reveals strong effect of surface characteristic on tropical cyclone wind speed.