浅海的范围虽远较大洋为小,但在生产和国防上的意义却很重大,因此近年来已有不少人开始重视并从事了关于浅海水团分析的研究。然而这方面的研究无论从理论上或实用上来看,比起对大洋水团的研究来要生涩得多。这主要是因为浅海的海况过于复杂,不仅海况本身的变动性极大,而且影响它的外界因子也特别繁多。对于大洋来说,水文特征保持着良好的稳定性,而且体积庞大的水团几乎可以近似地当作无界水体来考虑,因而在 Although the scope of the shallow sea is much smaller than that of the ocean, its significance in production and national defense is very significant. Therefore, in recent years, many people have begun to pay attention to and engaged in the research on the shallow sea water mass analysis. However, the research in this area is much more jerky than the research on the oceanic water masses, both theoretically and practically. This is mainly because the sea conditions in the shallow sea are too complicated. Not only is the variation of the sea conditions itself extremely great, but also the external factors affecting it are particularly numerous. For the oceans, the hydrological characteristics are well-preserved and the bulky water masses can be approximated almost as an unbounded body of water,