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用绝热表层风海流模式,以1949～1979年COADS资料,研究北太平洋表层风海流及相应水位场随季节变化的特点、某些特定年表层风海流的异常。模式采用二次动量守恒的有限差分方法,保证了计算稳定性。在数值积分中考虑了陆界、水界条件和近岸地形对风海流及水位场的影响。计算表明:模式反映了北太平洋主要流系的季节变化规律,能较敏感地反映上层海洋对大气动力作用的响应。给出了北太平洋主要流系的强弱与黑潮大弯曲的对应关系。
By using the adiabatic surface wind current model and the COADS data from 1949 to 1979, the anomalous surface wind currents in some special annuals are studied to study the seasonal variations of surface wind currents and corresponding water levels in the North Pacific Ocean. The model adopts finite difference method of conservation of second momentum to ensure the stability of calculation. In numerical integration, the influence of land boundary, water boundary conditions and nearshore topography on the wind current and water level field are considered. The calculation shows that the model reflects the seasonal variation of the main stream systems in the North Pacific and can reflect the response of the upper ocean to the aerodynamic effects more sensitively. The correspondence between the strength of the major flow in the North Pacific Ocean and the large kurtosis of the Kuroshio is given.