Calculation of the Sound Velocity in Stratified Seawater Based on a Set of Fundamental Equations

摘要

An algorithm for calculating the sound velocity in seawater is developed based on the analytical treatment of a fundamental set of thermo-hydrodynamics equations using perturbation theory methods with the IES 80 empirical equation of state. The calculation procedure makes it possible to determine any single quantity of the set of basic physical parameters "pressure—temperature—salinity—sound speed" from the values of the other three. The calculated data fit well with the UNESCO tables. These methods can be used to control the accuracy of sea measurements on a real time basis if the redundancy condition is satisfied. Due to the increased number of recorded parameters, it is possible to identify the sensor that introduces the largest error.