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| Titel |
Mutually consistent thermodynamic potentials for fluid water, ice and seawater: a new standard for oceanography |
| VerfasserIn |
R. Feistel, D. G. Wright, K. Miyagawa, A. H. Harvey, J. Hruby, D. R. Jackett, T. J. McDougall, W. Wagner |
| 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 ; 4, no. 4 ; Nr. 4, no. 4 (2008-12-12), S.275-291 |
| Datensatznummer |
250001891
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| Publikation (Nr.) |
 copernicus.org/os-4-275-2008.pdf |
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| Zusammenfassung |
| A new seawater standard for oceanographic and engineering applications has
been developed that consists of three independent thermodynamic potential
functions, derived from extensive distinct sets of very accurate
experimental data. The results have been formulated as Releases of the
International Association for the Properties of Water and Steam, IAPWS
(1996, 2006, 2008) and are expected to be adopted internationally by other
organizations in subsequent years. In order to successfully perform
computations such as phase equilibria from combinations of these potential
functions, mutual compatibility and consistency of these independent
mathematical functions must be ensured. In this article, a brief review of
their separate development and ranges of validity is given. We analyse
background details on the conditions specified at their reference states,
the triple point and the standard ocean state, to ensure the mutual
consistency of the different formulations, and the necessity and possibility
of numerically evaluating metastable states of liquid water. Computed from
this formulation in quadruple precision (128-bit floating point numbers),
tables of numerical reference values are provided as anchor points for the
consistent incorporation of additional potential functions in the future,
and as unambiguous benchmarks to be used in the determination of numerical
uncertainty estimates of double-precision implementations on different
platforms that may be customized for special purposes. |
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