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

R. N. Bardakov, A. V. Kistovich, and Yu. D. Chashechkin

A. Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences, Moscow, Russia

E-mail: chakin@ipmnet.ru

Received November 16, 2008

Abstract—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.

DOI: 10.1134/S000143701003001X

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