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Numerical Simulation of Typhoon Muifa(2011) Using a Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST) Modeling System

查看全文 作　　者：LIU [1]Na;LING [1]Tiejun;WANG [1]Hui;ZHANG [1]Yunfei;GAO [1]Zhiyi;WANG [1]Yi 高影响力作者 机构地区：[1]Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center高影响力机构 出　　处：《Journal of Ocean University of China》索引2015年第14卷第2期,共11页高影响力期刊 基　　金：supported by the Public Science and Technology Research Funds Projects of Ocean 201105018;the National Natural Science Foundation of China 41106023 摘　　要：The newly developed Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST) Modeling System is applied to investigate typhoon-ocean interactions in this study. The COAWST modeling system represents the state-of-the-art numerical simulation technique comprising several coupled models to study coastal and environmental processes. The modeling system is applied to simulate Typhoon Muifa(2011), which strengthened from a tropical storm to a super typhoon in the Northwestern Pacific, to explore the heat fluxes exchanged among the processes simulated using the atmosphere model WRF, ocean model ROMS and wave model SWAN. These three models adopted the same horizontal grid. Three numerical experiments with different coupling configurations are performed in order to investigate the impact of typhoon-ocean interaction on the intensity and ocean response to typhoon. The simulated typhoon tracks and intensities agree with observations. Comparisons of the simulated variables with available atmospheric and oceanic observations show the good performance of using the coupled modeling system for simulating the ocean and atmosphere processes during a typhoon event. The fully coupled simulation that includes a ocean model identifies a decreased SST as a result of the typhoon-forced entrainment. Typhoon intensity and wind speed are reduced due to the decrease of the sea surface temperature when using a coupled ocean model. The experiments with ocean coupled to atmosphere also results in decreased sea surface heat flux and air temperature. The heat flux decreases by about 29% compared to the WRF only case. The reduction of the energy induced by SST decreases, resulting in weakening of the typhoon. Coupling of the waves to the atmosphere and ocean model induces a slight increase of SST in the typhoon center area with the ocean-atmosphere interaction increased as a result of wave feedback to atmosphere. 关 键 词：数值模拟技术 海气耦合波 建模系统 强台风 输沙 梅花 气相互作用 海洋模式
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