Abstract
We examined the accuracy of a finite element code that enables us to analyze wind in the atmospheric boundary layer in a typhoon using wind observation data. As wind observation data, we used wind profiler and AMeDAS observation results during the period when Haishen 2020 passed near Minami Daito Island. Two gradient wind models, the Kepert model and the Georgiou model, were selected as upper-air boundary conditions to investigate their effects. As a result, it was found that the type of gradient wind model has a substantial effect on the consistency with observation results. In addition, in the numerical analysis, the drag coefficient of the sea surface is given over the whole lowest boundary without considering topographical and ground roughness effects. It was confirmed that such idealization leads to conservative wind speed in comparison with observation.
