基于波谱仪观测和再分析数据的热带气旋海浪有效波高数据重构研究  

Data reconstruction of tropical cyclone significant wave height based on ocean wave spectrometer observations and reanalysis data

作　　者：任宇恒 高源[1] 王运华[1] 孙建 REN Yuheng;GAO Yuan;WANG Yunhua;SUN Jian(Faculty of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学信息科学与工程学部,山东青岛266100 [2]中国海洋大学海洋与大气学院,山东青岛266100

出　　处：《热带海洋学报》2025年第2期48-55,共8页Journal of Tropical Oceanography

基　　金：国家自然科学基金项目(42306196);山东省自然科学基金项目(ZR2022QF069)。

摘　　要：有效波高数据是研究热带气旋海浪预测方法和反演技术的前提,文章利用中法海洋卫星(China-France oceanography satellite,CFOSAT)波谱仪(surface waves investigation and monitoring,SWIM)高精度有效波高观测数据,校正欧洲中期天气预报中心(European Center for Medium-range Weather Forecasts,ECMWF)第5代再分析资料(the fifth generation ECMWF reanalysis,ERA5)在高海况下低估有效波高的误差,为构建高精度、大样本量的热带气旋海浪有效波高数据集提供了一种可靠方法。首先,由于ERA5与SWIM数据存在时空分辨率差异,文章利用经纬度变换和反距离加权法空间插值对两种数据进行时空匹配。然后,通过数据对比得到了ERA5误差随SWIM有效波高增大而增大的相关关系,进而使用线性回归方法构建了从ERA5到SWIM的有效波高重构方程。最后,使用两处美国国家数据浮标中心(National Data Buoy Center,NDBC)浮标数据对重构方程进行了验证,对于5m以上海浪,ERA5有效波高数据的均方根误差分别从重构前的1.65m和1.08m降低到重构后的1.18m和0.71m,证明了重构方程的有效性。Data of significant wave heights(SWHs) is the basis of the investigations of tropical cyclone(TC) wave forecasting and retrieval technology.Based on the high-precision SWHs observed by the wave spectrometer of Surface Waves Investigation and Monitoring(SWIM) on board the China-France oceanography satellite(CFOSAT),this paper corrected the underestimation error of the SWHs under high sea state from the fifth generation reanalysis(ERA5) of European center for medium-range weather forecasts(ECMWF),providing a reliable support for the construction of a TC SWHs dataset with high accuracy and large sample quantity.Firstly,due to the temporal and spatial resolution differences between ERA5 and SWIM data,this paper utilized the latitude and longitude transformation and the inverse distance weighting method of spatial interpolation to match the two data spatially and temporally.Then,the correlation relationship that the ERA5 error increases with the increase of SWIM SWHs was obtained through data comparison.Based on this relationship,a reconstruction equation from ERA5 to SWIM was constructed using the linear regression method.Finally,the reconstruction equation was validated using the data from two(USA) National Data Buoy Center(NDBC) buoys.The results showed that for waves higher than 5 m,the Root Mean Square Error(RMSE) of the ERA5 SWHs reduced from 1.65 m and 1.08 m before the reconstruction to 1.18 m and 0.71 m after it,respectively,proving the effectiveness of the reconstruction equation.

关 键 词：波谱仪 ERA5 有效波高 热带气旋 

分 类 号：P732.33[天文地球—海洋科学]