Semi-prognostic calculation of the meridional overturning circulation with a realistic vertical diffusivity

半预报方法在水平动量方程中引入了位温和盐度的修正项，应用于理想的单半球浮力驱动流动的三维模型。具有真实层结和垂直扩散系数的经向翻转环流(MOC)的强度很小，这表明MOC的强度可能被先前的测量高估了，和/或MOC的很大一部分可能是由垂直扩散以外的动力过程驱动的。

The semi-prognostic method, which introduces a correction term for potential temperature and salinity to the horizontal momentum equation, is applied to an idealized three-dimensional model of buoyancy-driven flow in a single hemisphere. The magnitude of the meridional overturning circulation(MOC) with realistic stratification as well as vertical diffusivity is small, suggesting that the magnitude of the MOC might be overestimated by the previous measurements, and/or that a substantial part of the MOC might be driven by dynamical processes other than vertical diffusion.