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在一个嵌套的海洋环流模式基础上,采用基于变分原理的最优插值方法,初步建立了一个中国及周边海海温资料同化系统.利用1998世界大洋数据集(WOD98)中的海温垂直剖面资料和欧洲中心再分析风应力资料进行了连续12年的同化试验,初步结果表明,同化方案是有效可行的,与未同化前相比,资料同化提高了模式计算的真实性,对中国及周边海海洋环流状况的描述有了很大改善.如所揭示的黑潮的强度、流幅、夏季黄海冷水团及其对应的水平环流、晚夏早秋南海的偶极子涡及其中间的东向急流等都更接近于观测结果.
Based on a nested ocean circulation model, an optimal sea-temperature data assimilation system in China and its surroundings was established based on the optimal interpolation method based on variational principle. Using the SSTA data of 1998 World Ocean Data (WOD98) Profile data and reanalysis wind stress data from European Center for the first time in China. The preliminary results show that the assimilation scheme is effective and feasible. Compared with the data before assimilation, the data assimilation improves the accuracy of the model calculation. The description of the state of the ocean circulation in the surrounding seas has greatly improved. As revealed by the intensity of the Kuroshio, the flow rate, the summer Yellow Sea cold water mass and its corresponding horizontal circulation, the dipole vortex of the South China Sea in late summer and early autumn and the middle East To the rapids are closer to the observation results.