Evaluating the Accuracy of ERA5 Wave Reanalysis in the Water Around China  

作　　者：SHI Hongyuan CAO Xuefeng LI Qingjie LI Delei SUN Jiacheng YOU Zaijin SUN Qingying 

机构地区：[1]School of Civil Engineering,Ludong University,Yantai 264025,China [2]Institute of Ports and Coastal Disaster Mitigation,Ludong University,Yantai 264025,China [3]National Marine Environmental Monitoring Center,Dalian 116023,China [4]Yantai Marine Environmental Monitoring Central Station,State Oceanic Administration,Yantai 264006,China [5]Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

出　　处：《Journal of Ocean University of China》2021年第1期1-9,共9页中国海洋大学学报（英文版）

基　　金：supported by National Key R&D Program of China(No.2018YFB1501901);the National Natural Science Foundation of China(No.51909114);the Major Research Grant(Nos.U1806227 and U1906231)from the Natural Science Foundation of China and the Provincial Natural Science Foundation of Shandong;the Open Research Fund of the Key Laboratory of Ocean Circulation and Waves,Chinese Academy of Sciences(No.KLOCW1901);the Open Research Fund of State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences(No.LTO1905).

摘　　要：Wave parameters, such as wave height and wave period, are important for human activities, such as navigation, ocean engineering and sediment transport, etc. In this study, wave data from six buoys around Chinese waters, are used to assess the quality of wave height and wave period in the ERA5 reanalysis of the European Centre for Medium-Range Weather Forecasts. Annual hourly data with temporal resolution are used. The difference between the significant wave height(SWH) of ERA 5 and that of the buoy varies from-0.35 m to 0.30 m for the three shallow locations;for the three deep locations, the variation ranges from-0.09 m to 0.09 m. The ERA5 SWH data show positive biases, indicating an overall overestimation for all locations, except for E2 and S1 where underestimation is observed. During the tropical cyclone period, a large(about 32%) underestimation of the maximum SWH in the ERA5 data is observed. Hence, the ERA5 SWH data cannot be used for design applications without site-specific validation. The difference between the annual wave period from ERA5 and the mean wave period from the buoys varies from-1.31 s to 0.4 s. Inter-comparisons suggest that the ERA5 dataset is consistent with the annual mean SWH. However, for the average period, the performance is not good, and half of the correlation coefficients in the four points are less 50%. Overall, the deep water area simulation effect is better than that in the shallow water.

关 键 词：wave hindcasting REANALYSIS ERA5 wave height wave period 

分 类 号：P75[天文地球—海洋科学] P731.22