基于SWAN模式的台风浪数值模拟初步研究

A Preliminary Study of typhoon Wave Based on Numerical Simulationsusing SWAN Model

利用CCMP风场和Holland经验风场模型,构建不同合成半径的合成风场。基于SWAN模式对2010年第13号强台风鲇鱼进行数值模拟,然后使用卫星数据验证模式风速和波高,结果表明模式结果与实测值吻合良好,并且100km合成半径的风场模拟结果最佳。最后使用基于不同拖曳系数参数化方案的SWAN模型进行波高模拟,结果表明不同拖曳系数参数化方案造成的差异主要反映在大风区,新版本的SWAN41.01修正风能输入项后,波高模拟结果更加合理。

By interpolating CCMP sea surface wind field into a background wind field with spatial resolution of 5＇X 5＇ and temporal resolution of lh, new wind fields with different compound radii were builtcombining the Hollandempirical model. With these new wind fields, the SWAN model was used to simulating the 13th typhoon Megi in 2010,and the simulated winds and wave heights were verified with the satellite data. The simulated results werebasicallyin agreement withthe satellitedata, and the com- pound radius of 100kmhadthe best simulation result. By comparing different parameterizations for drag coefficient in SWAN,it was found that the influence ofthe different parameterizations on model results was generally reflected in gale regionin terms of wave height comparing to satellitealtimeter data. The new version of SWAN41.01 hadmorereasonableresult for wave height if the wind energy input was a mended.