台湾海峡海浪数值模拟和特征分析

Numerical simulation and characteristic analysis of ocean waves in the Taiwan Strait

利用第三代海浪数值模式WW3建立台湾海峡海浪数值计算模式,并以CCMP风场和台风经验模型的融合风场作为驱动,经浮标观测资料充分验证后,计算得到2014—2018年台湾海峡再分析海浪场。结果表明:台湾海峡受狭管效应影响显著,海浪具有明显的季节变化,冬季海浪比夏季强盛,海峡中北部整体大于南部。由于台湾岛的遮蔽作用,海峡内涌浪占比小,海峡内灾害性海浪出现频率高,年平均天数为38.4 d,波浪能资源储量丰富。

Based on the third-generation ocean wave numerical model WAVEWATCHⅢ,a wave model for the Taiwan Strait is established.Driven by the blended wind field of the Cross-Calibrated Multi-Platform and typhoon empirical model,and verified by the buoy observation data,the reanalysis wave fields in the Taiwan Strait from 2014 to 2018 is calculated in this paper.The results show that the Taiwan Strait is significantly affected by the narrow-tube effect,and the wave is characterized by significant seasonal variation with stronger wave in winter compared to that in summer.Moreover,the wave in the central and northern part of the Taiwan Strait is larger than that in the southern part.Due to the shielding effect of the Taiwan Island,the proportion of swell in the Strait is small.The frequency of disastrous waves in the Taiwan Strait is high with an annual average of 38.4 days,and there are abundant wave energy resources in the Strait.