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构建CCMP再分析风场与Holland经验台风风场的叠加风场作为海浪的驱动风场,建立SWAN自嵌套模型对影响江苏沿海的典型台风“梅花”引起的台风浪过程进行模拟。在得出风场叠加方式的基础上,设计3种订正系数方案及3种权重系数方案共9种风场构建方案,分别对东中国海进行台风浪模拟并结合Jason-1卫星高度计观测的有效波高数据进行比较分析,实验结果显示各方案有效波高的相对误差最大可相差3%。选取最佳方案的模拟结果为嵌套区域提供波谱边界条件,对嵌套区域的模拟结果表明:模拟值与浮标实测资料吻合较好;台风经过江苏沿海期间,近岸海域最大波高可达5~6 m,中北部海域波浪以涌浪为主,而南部海域则以风浪为主。
Constructed CCMP reanalysis wind field and Holland empirical typhoon wind field superimposed wind field as the driving wind field of the waves, and established the SWAN self-nesting model to simulate the typhoon wave course caused by the typical typhoon “plum ” in Jiangsu coastal area. Based on the wind field superposition method, three kinds of wind field construction schemes including three kinds of correction factor schemes and three kinds of weight coefficient schemes are designed. The typhoon wave simulations in the East China Sea and the observation of the Jason-1 satellite altimeter are respectively validated The wave height data are compared and analyzed. The experimental results show that the relative errors of the effective wave height of each scheme can differ up to 3%. The simulation results of the optimal scheme are used to provide the spectral boundary conditions for the nested region. The simulation results of the nested region show that the simulated values are in good agreement with the measured data of the buoy; the maximum wave height of the nearshore waters reaches 5 ~ 6 m. The waves in the central and northern parts of the country are mainly surge waves, while the southern part of the sea waves are mainly storm waves.