The compressibility of seawater has been determined as a function of salinity, pressure, and temperature. Specific volumes have been computed. The salinities, as measured on a University of Washington-type conductivity bridge, were 0.00, 30.52, 34.99, and 41.03‰. The pressure range was from r to r 300 bars and the temperature range from 0°C to 25°C. The experiments were carried out by measuring decrements of volume at 100-bar intervals spaced in 5° isotherms....
Newton, Mark S., and George C. Kennedy. 1965. "An experimental study of the P-V-T-S relations of seawater." Journal of Marine Research 23, (2). https://elischolar.library.yale.edu/journal_of_marine_research/1047