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长江是亚洲第一大河,巨大的迳流流入东海后,与外海水发生湍流混合,使本海区温盐结构随其发生变化。众所周知,某海区的盐度场结构及其变化是取决于该海区盐量收支的平衡规律。然而,考虑到长江冲淡水区是向(口)股水系交汇的海区,所以影响盐度场的因子众多而复杂。运用统计相关分析,虽然能给出各因子和海水盐度分布的某种程度的相关关系,但对长江冲淡水的动力结构及其混合过程并未揭示。为此,本文想通过对夏季长江冲淡水远岸段的表层平均盐度分布,给出一个可能的数字模式。为进一步探讨长江冲淡水的动力结构及其混合过程提供一些启示,以期对该区的认识乃至预报有所裨益。
The Yangtze River, the largest river in Asia, flows into the East China Sea with huge turbulent flow and turbulent mixing occurs with the open ocean water, causing the temperature-salinization structure in this area to change along with it. It is well-known that the salinity structure and its variation in a certain sea area depend on the balance of salt balance in this sea area. However, taking into account the fact that the Yangtze River flushing water area is a sea area that meets the (mouth) strata of water systems, there are many and complicated factors that affect the salinity field. Using statistical correlation analysis, although some correlations between the factors and the salinity distribution of seawater can be given, the dynamic structure of the fresh water and its mixing process are not revealed. For this reason, this article aims to give a possible numerical model of the surface salinity distribution over the summer flood waters of the Yangtze River. This paper will provide some enlightenment for further discussing the dynamic structure and the mixing process of the red water in the Yangtze River so as to bring some benefits to the cognition and forecast of the area.