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Metrological Traceability of Oceanographic Salinity Measurement Results : Volume 7, Issue 4 (22/07/2010)

By Seitz, S.

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Book Id: WPLBN0003979611
Format Type: PDF Article :
File Size: Pages 44
Reproduction Date: 2015

Title: Metrological Traceability of Oceanographic Salinity Measurement Results : Volume 7, Issue 4 (22/07/2010)  
Author: Seitz, S.
Volume: Vol. 7, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Wright, D. G., Weinreben, S., Bièvre, P. D., Seitz, S., Spitzer, P., & Feistel, R. (2010). Metrological Traceability of Oceanographic Salinity Measurement Results : Volume 7, Issue 4 (22/07/2010). Retrieved from

Description: Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany. Consistency of observed oceanographic salinity data is discussed with respect to contemporary metrological concepts. The claimed small uncertainty of salinity measurement results traceable to the conductivity ratio of a certified IAPSO Standard Seawater reference is not metrologically justified if results are compared on climatic time scales. This applies in particular to Practical Salinity SP, Reference Salinity SR, and the latest estimates of Absolute Salinity using the TEOS-10 formalism. In climate time scales an additional contribution to the uncertainty that is related to unknown property changes of the reference material must be accounted for. Moreover, when any of these measured or calculated quantity values is used to estimate Absolute Salinity of a seawater sample under investigation, another uncertainty contribution is required to quantify the accuracy of the equations relating the actually measured quantity to the Absolute Salinity. Without accounting for these additional uncertainties, such results cannot be used to estimate Absolute Salinity with respect to the International System of Units (SI), i.e. to the unit chosen for the mass fraction of dissolved material in the sample, which is g/kg. From a metrological point of view, such deficiencies in the calculations involving other quantities will produce SI-incompatible results. We outline how these problems can be overcome by linking salinity to primary SI measurement standards.

Metrological traceability of oceanographic salinity measurement results

Aoyama, M., Joyce, T. M., Kawano, T., and Takatsuki, Y.: Standard seawater comparison up to P129, Deep-Sea Res. Pt. I, 49, 1103–1114, 2002.; Bacon, S., Culkin, F., Higgs, N., and Ridout, P.: IAPSO standard seawater: definition of the uncertainty in the calibration procedure, and stability of recent batches, J. Atmos. Ocean. Tech., 24, 1785–1799, 2007.; Bacon, S., Snaith, H. M., and Yelland, M. J.: An evaluation of some recent batches of IAPSO standard seawater, J. Atmos. Ocean. Tech., 17, 854–861, 2000.; Brinkmann, F., Dam, N. E., Deák, E., Durbiano, F., Ferrara, E., Fükö, J., Jensen, H. D., Máriássy, M., Shreiner, R. H., Spitzer, P., Sudmeier, U., Surdu, M., and Vyskocil, L.: Primary methods for the measurement of electrolytic conductivity, Accred. Qual. Assur., 8, 346–353, 2003.; Chen, C. T. and Millero, F. J.: Precise thermodynamical properties for natural waters covering only the limnological range, Limnol. Oceanogr., 31, 657–662, 1986.; Culkin, F. and Ridout, P. S.: Stability of IAPSO standard seawater, J. Atmos. Ocean. Tech., 15, 1072–1075, 1998.; De Bièvre, P.: Essential for metrology in chemistry, but not yet achieved: truly internationally understood concepts and associated terms, Metrologia, 45, 335–341, 2008.; De Bièvre, P., Dybkaer, R., Fajgelj, A., and Hibbert, D. B.: Provisional IUPAC recommendations: Metrological traceability of measurement results in chemistry: concepts and implementation, International Union of Pure and Applied Chemistry, available at: (last modified: 13 July 2009), 2009.; Feistel, R.: A Gibbs function for seawater thermodynamics for ${-}6$ to 80 {\degree}C and salinity up to 120 g/kg, Deep-Sea Res. Pt. I, 55, 1639–1671, 2008.; Feistel, R.: A new extended Gibbs thermodynamic potential of seawater, Prog. Oceanogr., 58, 43–115, 2003.; Feistel, R. and Hagen, E.: On the Gibbs thermodynamic potential of water, Prog. Oceanogr., 36, 249–327, 1995.; Feistel, R., Marion, G. M., Pawlowicz, R., and Wright, D. G.: Thermophysical property anomalies of Baltic seawater, Ocean Sci. Discuss., 7, 1103–1208, doi:10.5194/osd-7-1103-2010, 2010.; Feistel, R., Weinreben, S., Wolf, H., Seitz, S., Spitzer, P., Adel, B., Nausch, G., Schneider, B., and Wright, D. G.: Density and Absolute Salinity of the Baltic Sea 2006–2009, Ocean Sci., 6, 3–24, doi:10.5194/os-6-3-2010, 2010.; Feistel, R., Wright, D. G., Miyagawa, K., Harvey, A. H., Hruby, J., Jackett, D. R., McDougall, T. J., and Wagner, W.: Mutually consistent thermodynamic potentials for fluid water, ice and seawater: a new standard for oceanography, Ocean Sci., 4, 275–291, doi:10.5194/os-4-275-2008, 2008.; Forch, C., Knudsen, M., and Sørensen, S. P. L.: Berichte über die Konstantenbestimmungen zur Aufstellung der hydrographischen Tabellen, gesammelt von Martin Knudsen, Det Kongelige Danske Videnskabernes Selskabs Skrifter, 6, 1–152, 1902.; GUM: Guide to the expression of uncertainty in measurement, Guide 98–3:2008 [JCGM 100:2008], Geneva, Switzerland, available at:\\, 2008.; IOC


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