西北太平洋三台风影响下海浪的数值模拟研究  

Numerical simulation of typhoon waves in the Northwest Pacific Ocean

作　　者：周媛媛[1] 周林[1] 关皓 

机构地区：[1]解放军理工大学气象海洋学院 [2]解放军61741部队

出　　处：《海洋预报》2016年第5期23-30,共8页Marine Forecasts

基　　金：国家自然科学基金(41106014)

摘　　要：采用NCEP-FNL(Final Operational Global Analysis)再分析风场资料及WW3(WAVEWATCH Ⅲ)海浪模式对2015年连续发生的1509号台风"灿鸿"、1510号台风"莲花"和1511号台风"浪卡"进行数值模拟。通过与卫星高度计资料和浮标观测资料对比,验证了模拟结果的有效性,并分析台风浪的特征。结果表明:采用再分析风场资料驱动WW3海浪模式,较好地模拟了3个台风影响下西北太平洋海浪场的分布和演变特征;模拟波高与遥感的轨道波高资料相关性超过0.7,平均相对误差小于0.23,风速误差是造成模拟误差的主要原因;台风浪的大小不仅取决于台风强度,还受海域的影响。近海海域由于海岸与岛屿的阻碍,波浪能量频散受到抑制,易产生局地巨浪;而深海大洋开阔海域,易于台风浪能量传播。本文相关结论为台风浪的定量预报及防灾减灾提供有益参考。The third-generation wave model WAVEWATCH was used to simulate the wave field caused by typhoon“Chan-hom”,“Linfa”and“Nangka”with wind input of NCEP-FNL wind field. The numerical typhoon wave distribution in time and space is analyzed and compared with those of observation by the Jason-2 satellite altimeter and the nearshore-located wave recorder which show good agreements. The results show that： The simulation typhoon wave field does well in embodying the structure characteristics of the 3 typhoons when use NCEP-FNL wind field to drive WAVEWATCH Ⅲ wave model. The correlation coefficient between simulated wave height and observed data of Jason-2 is greater than 0.7 while the average relative error is less than 0.23 m with the simulation error mainly caused by the wind speed error. The size of typhoon wave not only depends on the wind speed, but also affected by the sea area. In this paper, the related conclusions provide some useful reference for quantitative forecast of typhoon wave and disaster prevention.

关 键 词：WAVEWATCHⅢ海浪模式 数值模拟 台风浪 有效波高 

分 类 号：P731.22[天文地球—海洋科学]