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| Titel |
Thermodynamic properties of standard seawater: extensions to high temperatures and pressures |
| VerfasserIn |
J. Safarov, F. Millero, R. Feistel, A. Heintz, E. Hassel |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 5, no. 3 ; Nr. 5, no. 3 (2009-07-07), S.235-246 |
| Datensatznummer |
250002574
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| Publikation (Nr.) |
 copernicus.org/os-5-235-2009.pdf |
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| Zusammenfassung |
| Measurements of (p, ρ, T) properties of standard seawater with
practical salinity S≈35, temperature T=(273.14 to 468.06) K
and pressures, p, up to 140 MPa are reported with the reproducibility of
the density measurements observed to be in the average percent deviation
range Δρ/ρ=±(0.01 to 0.03)%. The measurements are made with a newly constructed vibration-tube
densimeter which is calibrated using double-distilled water, methanol and
aqueous NaCl solutions. Based on these and previous measurements, an
empirical expression for the density of standard seawater has been developed
as a function of pressure and temperature. This equation is used to calculate
other volumetric properties including isothermal compressibility, isobaric
thermal expansibility, differences in isobaric and isochoric heat capacities,
the thermal pressure coefficient, internal pressure and the secant bulk
modulus. The results can be used to extend the present equation of state of
seawater to higher temperatures for pressure up to 140 MPa. |
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