东中国海台风浪分布特征研究

The Distributional Character of Typhoon Waves in the East China Sea

台风引起的大浪对海岸带及海洋工程有很大的影响。进行长时间序列的台风资料分析和台风浪模拟,对海岸带规划及海洋工程防护有一定的指导意义。本文利用西北太平洋热带气旋最佳路径数据集(CMA-STI热带气旋最佳路径数据集)中提供的台风信息,分别统计和分析了1949—2010年和1981—2010年出现在东中国海海域的台风的时间分布特征和空间分布特征,并将2个时间段的分布特征进行比较。利用高桥公式和藤田公式计算了1981—2010年间92次台风过程的气压场分布,进而计算出风场,把经过验证的风场做为驱动,通过SWAN模式计算出有效波高。经过与B22001号浮标实测资料的对比,模型计算风速和有效波高均与实测值符合较好。根据模拟计算结果,分析了东中国海海域台风浪有效波高的分布特征。

Typhoons are tropical cyclones which reach a certain intensity. The surge caused by typhoon has great influence on the coastal and ocean engineering. So, long time series data analysis, and typho waves simulation, have a important guiding sense to the the coastal planning and ocean engineering protection, especially in the offshore area of China. This paper counts and analyzes the distributional characteristics of typhoon over the East China Sea during 1949 and 2010, with the information of typhoon provided by CMA-STI Best Track Dataset for Tropical Cyclones over the Western North Pacific. In this paper, pres- sure is calculated with Takahashi and Fujita. T. formula, and the computational results are used to calcu- late typhoon wind. Finally, typhoon wave is simulated with SWAN model. Simulation results are consistent well with the buoy data. According to the simulation results, this paper analyzes the distributional character of typhoon waves in the East China Sea.