利用布设在高频地波雷达福建示范区的东山、龙海2个雷达站的约3天的海流数据进行矢量正交经验函数分析。分析结果表明前3个模态的方差贡献率分别为91%、4%和1.4%, 累计方差贡献率达到了96%, 是主要模态。模态1的空时分布特性表明模态1主要反映了半日潮流的信息, 并且在一定程度上反映了水深分布的信息; 模态2的空时分布特性表明模态2主要反映了风生流以及流场旋转特性的信息; 模态3的空时分布特性表明模态3主要反映了上升流的信息。

The complex Empirical Orthogonal Function(complex-EOF) analysis is performed on three days’ ocean surface currents measured by two High Frequency Surface Wave Radar(HFSWR) systems located at Fujian province. The results show that the first three modes explain 91%, 4% and 1.4% of the variance, respectively. The cumulative variance reaches 96%, which are the main modes. The spatial and temporal distribution characteristics of mode 1 show that mode 1 mainly contains the information of semidiurnal tidal currents and reflects the information of water depth to a certain extent. Mode 2 mainly reveals the information of wind-driven current and shows the rotary characteristics of ocean surface currents. Mode 3 mainly reflects the information of upwelling currents.