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Is Practical Salinity conservative in the Baltic Sea?

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Author(s): Rainer Feistel | Stefan Weinreben

Journal: Oceanologia
ISSN 0078-3234

Volume: 50;
Issue: 1;
Start page: 73;
Date: 2008;
Original page

Keywords: PracticaSalinity Scale 1978 | Standard Seawater | Salinity conservation | Composition anomaly | Baltic Sea

ABSTRACT
The conductivity-salinity conversion algorithm used for oceanographic measurements of Practical Salinity on the PSS-78 scale is designed for IAPSO Standard Seawater. The application of this formula to a given sample of non-standard seawater does not necessarily result in a constant salinity value when the sample's conductivity is measured at different temperatures. We have experimentally studied the magnitude of this non-conservative effect of Practical Salinity using a sample of Baltic seawater possessing a density anomaly of about 50 g m-3. The apparent change of salinity observed is at the limit of experimental uncertainty and is not significantly different from the drift of Standard Seawater, which was measured for comparison.
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