Development of quantitative prediction approach of wind gusts in urban areas by merging meteorological model and LES model

在这项研究中，我们开发了一种考虑城市湍流和气象场影响的城市地区风变化的数值方法。这种方法使用高分辨率气象模式的输出作为大涡模拟（LES）模式的输入。所提出的方法被应用于台风和热带外气旋的情况下，这些台风和热带外气旋在东京商业区产生了巨大的阵风。结果表明，本文提出的耦合气象模式和LES模式的方法能够对城市地区的阵风强度进行定量估计。这种新方法将用于解决与自然灾害、环境和应急反应有关的问题。

In this study, we have developed a numerical approach of wind variation over urban areas by taking into account the effects of urban turbulence and meteorological fields. This approach uses the outputs of a high-resolution meteorological model as the inputs of a large-eddy simulation(LES) model. The proposed approach was applied to cases of typhoons and extra-tropical cyclones that spawned significant wind gusts over the Tokyo business district. It was demonstrated that the proposed approach of coupling a meteorological model and an LES model is able to quantitatively estimate the intensity of wind gusts over the urban area. This new approach will be used for applications to solve problems related to natural disasters, environments, and emergency responses.