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*

doi:10.11978/2024111

Abstract

Abstract:

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.

Key words: wave spectrometer, ERA5, significant wave height, tropical cyclone

CLC Number:

P732.33

REN Yuheng, GAO Yuan, WANG Yunhua, SUN Jian. Data reconstruction of tropical cyclone significant wave height based on ocean wave spectrometer observations and reanalysis data^*[J].Journal of Tropical Oceanography, 2025, 44(2): 48-55.

Figures/Tables 13

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References 20

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验证参数	重构前	重构后
均方根误差/m	0.24	0.23
平均绝对误差/m	0.18	0.18
相关系数	0.94	0.94

验证参数	重构前	重构后
均方根误差/m	0.32	0.31
平均绝对误差/m	0.26	0.20
相关系数	0.95	0.96

验证参数	重构前	重构后
均方根误差/m	1.65	1.18
平均绝对误差/m	1.43	0.89
相关系数	0.72	0.91

验证参数	重构前	重构后
均方根误差/m	1.08	0.71
平均绝对误差/m	0.94	0.54
相关系数	0.78	0.90

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

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

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