Speed data, sound seawater

The pressure dependence of (3P/3v) can be tested by fitting [(3P/3v)P - (3P/3v) ]/P vs. pressure. It is clearly shown in Figure 14 that the values of [(3P/3v)p - (3P/3v) ]/P for pure water and 35 °/oo salinity seawater determined from sound speed data (112,123),increase almost linearly with pressure. This indicates that P or even higher order terms are needed to represent (3P/3v) over the pressure range of 0 to 1000 bars. In other words, the Tammann equation and the original Tait equation do not represent the PVT properties for pure or saline water within the accuracy of the data. 

Figure 14. Values of [(dP/Bv)p — (BP/3v)°]/P for pure water and 35%o salinity seawater determined from sound speed data (112, 123).

Li (142) published a variation of the Tait-Gibson equation for seawater from both compressibility and sound speed data... 

On the other hand, the kinetics of the boric acid-borate equilibrium are less well known. Yet in order to calculate fluxes, pH gradient and boron isotope distribution in the vicinity of a foraminifer, the kinetics (i.e. the speed of the conversion between the two dissolved boron species) is crucial. At the time when we developed the numerical models of the chemical microenvironment of foraminifera there was, to the best of our knowledge, no measured value for this rate constant available in the literature. The problem was eventually solved by considering sound absorption data in seawater, which is described in Zeebe et al. (2001). 

---