Effect of High-Resolution Meteorological Forcing on Nearshore Wave and Current Model Performance
Effect of High-Resolution Meteorological Forcing on Nearshore Wave and Current Model Performance
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DOI：
10.1175/jtech-d-12-00087.1
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发表时间：
2013-06-01
影响因子：
2.2
通讯作者：
Maria Baldasano, Jose
中科院分区：
文献类型：
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作者：
Bricheno, Lucy M.;Soret, Albert;Maria Baldasano, Jose
风强迫和平均海平面气压的精确表示对于模拟波浪和涌浪是重要的。这对于复杂的沿海地区尤其重要。天气研究和预报（WRF）模型已运行在12-，4-和1.33-公里分辨率的风暴事件在爱尔兰海。的输出被用来迫使耦合的水动力和Proudman海洋学实验室沿海海洋模拟系统（POLCOMS）-波浪模型（WAM）和风暴潮和波浪的影响进行了评估。当分辨率从12公里提高到4公里时，观察到WRF模式气压和风速的改善，风速误差平均减少10%以上。当从4公里移动到1.33公里时，没有观察到进一步的显著改善。然后将12公里和4公里处的大气模型结果应用于海洋模型。随着海洋模式分辨率的提高，波浪方向也得到了改善，而更高分辨率的强迫通常会使爱尔兰海的波高增加40厘米。当使用4公里气象强迫时，观察到波浪方向的聚类得到改善。由于海岸线以及大气边界层的代表性得到改善，在沿海地区出现了很大的差异。高分辨率大气强迫和耦合波涌模式的组合给出了最好的结果。
Accurate representation of wind forcing and mean sea level pressure is important for modeling waves and surges. This is especially important for complex coastal zone areas. The Weather Research and Forecasting (WRF) model has been run at 12-, 4-, and 1.33-km resolution for a storm event over the Irish Sea. The outputs were used to force the coupled hydrodynamic and the Proudman Oceanographic Laboratory Coastal Ocean Modeling System (POLCOMS)-Wave Model (WAM) and the effect on storm surge and waves has been assessed. An improvement was observed in the WRF model pressure and wind speed when moving from 12- to 4-km resolution with errors in wind speed decreasing more than 10% on average. When moving from 4 to 1.33km no further significant improvement was observed. The atmospheric model results at 12 and 4 km were then applied to the ocean model. Wave direction was seen to improve with increased ocean model resolution, and higher-resolution forcing was found to generally increase the wave height over the Irish Sea by up to 40cm in places. Improved clustering of wave direction was observed when 4-km meteorological forcing was used. Large differences were seen in the coastal zone because of the improved representation of the coastline and, in turn, the atmospheric boundary layer. The combination of high-resolution atmospheric forcing and a coupled wave-surge model gave the best result.