黄渤海及东海北部海域等效蒸发波导特征参量计算方案研究

Study on caculation of characteristic parameters of equivalent evaporation duct in Yellow Sea,Bohai Sea and northern East China Sea

针对黄渤海及东海北部海域等效蒸发波导特征参量计算方案相关研究匮乏的问题,利用船测气象数据对现有计算方案的适用性进行分析验证。通过引入希尔伯特黄变换进行降噪处理,并采用均方根误差及皮尔逊相关系数进行方案结果比对。同时,考虑到今后波导数据采集的实际情况,对有无“海表面”的数据条件也分别进行了分析。研究结果表明:受气象传感器精度影响带来的探空数据测量误差可以通过希尔伯特黄变换有效地滤除;无论是否引入“海表面”数据,在试验海域,等效蒸发波导的特征参量计算方案使用效果最好的均为Steeneveld等提出的计算方法(方案3),这为日后的研究工作提供了有效的参考。

In view of the lack of research on the calculation schemes of the characteristic parameters of the equivalent evaporation duct in the Yellow Sea,Bohai Sea and the northern East China Sea,the applicability of the existing calculation schemes was analyzed and verified by using the ship meteorological data.The Hilbert Huang Transform was introduced to denoise,and the root mean square error and Pearson correlation coefficient were used to compare the scheme results.Meanwhile,considering the actual situation of waveguide data acquisition in the future,two conditions that include"sea surface"or exclude"sea surface"were analyzed.The results show that the measurement error of radiosonde data affected by the accuracy of meteorological sensors can be effectively filtered out by Hilbert Huang Transform,and that in both cases,the best scheme for calculating the characteristic parameters of the equivalent evaporation duct in the test sea area is scheme 3,which provides an effective reference for future research.