Abnormal Storm Wave Simulation using Bogussed Wind Fields

Abstract

Abnormal storm waves that cause coastal disasters along the coasts of Korean Peninsula and Japan in rough sea states in the East Sea in winter due to developed low pressures during the East Asia winter monsoon were modified by using bogussing scheme in meso-scale atmospheric numerical model (Grell et al., 1995). Wind waves and swell due to developed low pressures were found to be the main components of abnormal storm waves. The simulated meteorological conditions that generate these waves are not so appropriated for their limitation in severer condition. In hindcasting the abnormal storm waves, a bogussing scheme originally designed to simulate a tropical storm in a mesoscale meteorological model was introduced into the modelling system to enhance the resolution of developed low pressures. The modelling results with a bogussing scheme showed improvements in terms of resolved low pressure, surface wind field, and wave characteristics obtained with the wind field as an input.