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一、本文目的海水密度系海水的盐度、温度和压力的连续函数,而在海水的压力每增加1分巴值深度几增加1米的极近似情况下,海水密度即系海水的盐度、温度和深度的连续函数。在必须精确获知海水密度值的要求下,海水的密度是藉它与盐度、温度和压力三者的函数关系计算而得的。为了要使计算所得的海水密度值有一定的精确度,所以海洋盐度、温度和深度调查的精确度就必须有一定的要求。由於中国海皆系浅海,所以本文仅就浅海海洋盐度、温度和深度调查的精确度与海水密度计算的关系加以论述。
The purpose of this paper is that the seawater density is a continuous function of the salinity, temperature and pressure of the seawater. However, for the extreme approximation that the seawater pressure is increased by 1m for every 1cm increase in the depth of the seawater, the seawater density is the salinity of the seawater, Continuous function of temperature and depth. The density of seawater is calculated by its function as a function of salinity, temperature and pressure, where the density of seawater must be known accurately. In order to obtain a certain degree of accuracy of the calculated seawater density values, the accuracy of the marine salinity, temperature and depth surveys must meet certain requirements. Because of the shallow sea in China, the paper only discusses the relationship between the accuracy of ocean salinity, temperature and depth survey of shallow ocean and the calculation of seawater density.