本文指出,海水中Ca和Mg的分布变化不仅能定性地鉴别水系的类别,而且还能半定量地划出它们的流经范围。在夏季,位于32°N、126°E东海海区周围Ca和Mg分布异常,含量较其它海区都高。这与海底分布着的一块孤立的软泥位置十分吻合。在该海区,由于涌升流存在,将海底沉积物中溶解态Ca和Mg带至上层。可见,Ca和Mg的分布异常区与水系、上升流及海底沉积物都有非常密切的关系。 This paper points out that the distribution of Ca and Mg in seawater can not only qualitatively identify the type of water system, but also semi-quantitatively draw their flow through the range. In the summer, the distribution of Ca and Mg in the East China Sea at 32 ° N and 126 ° E is abnormally distributed, which is higher than that in other sea areas. This coincides with the location of a solitary silt lying on the seabed. In this sea area, Ca and Mg dissolved in seafloor sediments are brought to the upper level due to the presence of the upwelling. It can be seen that the anomalous distribution of Ca and Mg has a very close relationship with the water system, upwelling and seafloor sediments.