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www.ocean-sci-discuss.net/6/689/2009/
doi:10.5194/osd-6-689-2009
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Thermodynamic properties of standard seawater
1Lehrstuhl für Technische Thermodynamik, Universität Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany
2Department of Heat and Refrigeration Techniques, Azerbaijan Technical University, H. Javid Avn. 25, AZ1073 Baku, Azerbaijan
3Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, 33149 Miami, FL, USA
4Sektion Physikalische Ozeanographie und Messtechnik, Leibniz-Institut für Ostseeforschung, Seestr. 15, 18119 Warnemünde, Germany
5Abteilung für Physikalische Chemie, Universität Rostock, Hermannstr. 14, 18051 Rostock, Germany
Abstract. (p, ρ, T) data of standard seawater with practical salinity S≈35 (corresponding to an absolute salinity SA≈35.16504 g/kg) measured at T=(273.14 to 468.06) K and pressures up to p=140 MPa are reported with an estimated experimental relative combined standard uncertainty of 0.006% in density. The measurements were made with a newly constructed vibration-tube densimeter. The system was calibrated using double-distilled water, methanol and aqueous NaCl solutions. An empirical correlation for the density of standard seawater has been developed as a function of pressure and temperature. This equation of state was used to calculate other volumetric properties such as isothermal compressibility, isobaric thermal expansibility, differences in isobaric and isochoric heat capacities, thermal pressure coefficient, internal pressure and secant bulk modulus. The results can be used to extend the present equation of state of seawater to higher temperature as a function of pressure.
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Citation: Safarov, J., Millero, F., Feistel, R., Heintz, A., and Hassel, E.: Thermodynamic properties of standard seawater, Ocean Sci. Discuss., 6, 689-722, doi:10.5194/osd-6-689-2009, 2009. Bibtex EndNote Reference Manager XML
