摘要
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。
Based on COADS data from 1949-1979,the characteristics of wind-driven currents and sea level in every season in the North Pacific and their anomalies in some specical years have been studied in this paper.The model is two dimensional and adiabatic.The den- sity change which only results from monthly mean temperature change is considered.The coastal landforms,land and water boundary conditions affecting wind-driven currents and height are analysed in the numerical calculations.The finite difference method of the quadratic momentum conservation is used in this model,which assured the computational stabi lity.The computational results show that using this model,the seasonal variablitics of the main surface currents and the correspondence relations between the strength of the main currents with the meander of the Kuroshio are basically simulated in the North Pacific.The responses of the upper sea to the atmospheric dynamic action are sensitive.
基金
国家自然科学基金
关键词
北太平洋
风海流
水位
季节
变化
The North Pacific
wind-driven currents,sea level
response
