1980年国际标准海水状态方程应用于低盐海水的可能性

On the Possibility of Extending the Application of the International Equation of State of Seawater (1980) to Seawaters with Very Low Salinities

为了考察１９８０ 年国际标准海水状态方程在盐度小于０ ．５ 条件下的适用性，测定了０ ．０３９～２ ．０００ 盐度范围内的稀释大洋水的密度，并与状态方程的计算值作了比较。测定值与计算值之间的平均偏差为±０．６×１０－ ３ｋｇ／ｍ３ ，小于状态方程的标准偏差３．６ ×１０－ ３ｋｇ／ｍ３ 。结果认为１９８０ 年国际标准海水状态方程的低盐范围可以从现在的０．５ 继续扩展到０．０３９ 。

The densities of 7 diluted North Pacific Ocean seawater samples with salinities between 0.039～0.500 were measured with a high precision magnetic float density meter at 15.536℃ , 19.602℃ and 24.976℃, respectively. The measured densities were compared with calcuated values from the International Equation of state of Seawater (1980). The average deviation of both series of data are about ±0.6×10 -3 kg/m 3, so that the application of the International Equation of state of seawater (1980) may be extended application to diluted ocean seawaters with very low salinities.