赤道大洋定常风生环流的理论模型

A Theoretical Model for the Steady Equatorial Ocean Wind-driven Circulation

为了模拟以南、北赤道流、赤道逆流和赤道潜流为特征的赤道流系,从长时间平均的线性化的海水运动方程出发,考虑海水层化、保留经向摩擦作用,利用赤道太平洋中部海区经向流通量不随纬度变化的量阶估计,得到海水密度跃层对赤道风场的响应,即跃层深度的分布规律,然后应用我们已构建的改进 Fourier方法求解(由于地转β效应所引入的)变系数的海水运动方程,得到适用于中部赤道太平洋的级数形式的三维流场解。

In order to simulate the equatorial current system characerized by the North Equatorial Current, the South Equatorial Current, the Equatorial Counter-current and the Equatorial Undercurrent, the time-averaged linearized motion equations are used as the governing equations, and the seawater stratification and longitudinal friction are taken into consideration. On the assumption that the meridional transport does not vary with latitude in the central equatorial Pacific Ocean, the response of pycnocline depth is obtained. The corrected Fourier method is then used to find the solution of the varied coefficient motion equations so as to obtain the three-dimentional current field solution aplicable to the central equatorial Pacific Ocean.