海洋长期物质输运理论模型和数值模拟I·理论模型

The Theoretical Model and Numerical Test of Long-Term Mass Transportation (LTMT) in the Ocean Ⅰ. Theoretical Model

本文把海洋长期物质输运效果看作是涡团运动、潮波运动和大洋环流三类机制共同作用的总和。寻找潮波运动的定常参量来描述潮波对海洋长期物质输运的效果,同时认为涡团运动主要是潮波运动的空间不均匀造成的。提出了潮流二阶相关的概念,延拓了湍流二阶闭合的理论。建立了基于潮流二阶闭合的海洋长期物质输运动力学方程,在典型海区中进行了数值模拟。通过模拟的结果校验潮流二阶闭合的因子。

It is summarized in this paper that three kinds of oceanic movements, eddy motion, tidal motion and large scale circulation, contribute to the long-term mass transportation (LTMT) of the ocean. While constant parameters of tidal motion are used to describe its effect on LTMT, the author considers that eddy motion is mainly induced by the non-uniform spatial distribution of tidal motion. Extending the idea of 2nd order closure model for turbulence, this paper forwards the conception of 2nd order correlation for tidal current. Based on the new conception, a set closure dynamic equations on LTMT are introduced, by which a numerical test is carried out in a typical ocean area to verify the parameters in the model.