Wave characteristics analysis in Bohai Sea based on ECMWF wind field
Wave characteristics analysis in Bohai Sea based on ECMWF wind field
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DOI：
10.1016/j.oceaneng.2014.09.010
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发表时间：
2014-11-15
影响因子：
5
通讯作者：
Tao, Jianhua
中科院分区：
文献类型：
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作者：
Lv, Xiangcui;Yuan, Dekui;Tao, Jianhua
为了进一步了解渤海风浪特征，采用SWAN（Simulated Waves Nearshore）模型对1993年至2012年渤海海域的波浪特征进行了研究。SWAN模型由ECMWF（欧洲中期天气预报中心）的风数据驱动。 ECMVVF风速资料与现场实测数据对比表明，ECMWF风速资料低估了渤海风速，但总体趋势和主导方向与观测数据一致。因此，ECMWF风数据在输入SWAN模型之前根据现场实测数据进行了修正。利用短期和长期现场实测数据对SWAN模型进行了标定，模型结果与实测数据吻合较好。分析了波高、平均周期和波向的时空分布。这表明我们的结果与之前的研究结果基本一致。但以往的研究对渤海三大海湾的有义波高高估了10厘米，对渤海中心和渤海海峡的有义波高高估了1-10厘米。 (C) 2014 Elsevier Ltd. 保留所有权利。
In order to achieve further understanding of the characteristics of wind waves in the Bohai Sea, the SWAN (Simulating Waves Nearshore) model is applied to investigate the wave characteristics in Bohai Sea for the period from 1993 to 2012. The SWAN model is driven by the wind data from ECMWF (European Center for Medium Range Weather Forecasts). Comparison of the ECMVVF wind data against the field measured data shows that the ECMWF wind data underestimates wind speed over the Bohai Sea, though the overall trend and dominant directions are consistent with the observational data. Thus, the ECMWF wind data was corrected according to the filed measured data before it is input into the SWAN model. The SWAN model is calibrated using both the short-term and long-term field measured data, and the model results agree well with the measured data. The temporal and spatial distribution of wave height, averaged period and wave direction were analyzed. It shows that our results are generally agree with that of the previous studies. However, the previous studies overestimate the significant wave height by 10 cm in three major bays in Bohai Sea and by 1-10 cm in Bohai Center and the Bohai Strait. (C) 2014 Elsevier Ltd. All rights reserved.