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本文对渤海,黄海,东海北部海域多年平均表层水温年变化进行了调和分析,较详细地讨论了各调和分量振幅和初相位的分布特征及对海温年变化的影响,初步分析了其成因。结果表明,各调和参数的分布与太阳辐射,水陆分布,海底地形,尤其是与该海域不同示性流系的分布及其他热动力因素密切相关;对马暖流,黄海 暖流海域较显著的半年周期分量,似与暖流强弱变化有关;分析海域高次调和项对水温年变化的贡献较小,渤海仅需前三个调和项即可逼近水温年变化,黄海北部和黄海中南部需前五项方能逼近,而东海北部需全部六项方能逼近。
In this paper, the annual variations of surface water temperature over the years in the Bohai Sea, the Yellow Sea and the northern East China Sea are reconciled. The distribution characteristics of the amplitude and initial phase of each harmonic component and their effects on the annual variation of sea surface temperature are discussed in detail, and their causes are analyzed preliminarily. The results show that the distribution of the harmonic parameters is closely related to solar radiation, amphibian distribution, seafloor topography, especially with the distribution of different representative flow systems and other thermodynamic factors in this area. For the semi-annual period The component seems to be related to the change of the intensity of the warm current. The analysis of the high-order harmonic item in the sea area makes little contribution to the annual change of water temperature. Only the first three harmonic items in the Bohai Sea can approximate the annual change of water temperature. In the northern part of the Yellow Sea and the middle- Can approach, while the northern part of the East China Sea to be able to approach all six.