Guidelines for determination of salinity and temperature using CTD.
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Salinity Measurements based on electrical conductivity have since the 1960s replaced measurements of chlorinity. The Practical Salinity Scale of 1978 (PSS-78) presently used, has been defined to maintain a continuity with older scales and methods. The scale is based on conductivity of a reference solution prepared from potassium chloride. Practical Salinity (SP) is calculated from the ratio of conductivity between sample and reference solution. Since the scale is based on a ratio, no unit is assigned to it. Despite this, salinity data are sometimes presented with the units ‰ or psu. The equations used in calculation of Practical Salinity from conductivity are valid for practical salinity ranging from 2 to 42. A new standard for the properties of seawater was introduced in 2010; the thermodynamic equation of seawater 2010 (TEOS-10). This standard also includes a new scale, called the Absolute Salinity scale. Absolute Salinity (SA) is expressed as a mass fraction, in grams per kilogr.....
Sustainable Development Goals (SDG)14.a
Essential Ocean Variables (EOV)Surface salinity
Spatial CoverageBaltic Sea
CitationHELCOM (2017) Guidelines for determination of salinity and temperature using CTD. Helsinki, Finland, HELCOM, 6pp. DOI: http://dx.doi.org/10.25607/OBP-1797