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    • HELCOM Manuals and Guidelines
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    • ⇒ HELCOM: Baltic Marine Environment Protection Commission
    • HELCOM Manuals and Guidelines
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    Guidelines for determination of salinity and temperature using CTD.

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    Date
    2017
    Corporate Author
    HELCOM
    Status
    Published
    Pages
    6pp.
    
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    Abstract
    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.....
    Resource URL
    https://helcom.fi/helcom-at-work/publications/manuals-and-guidelines/
    Publisher
    HELCOM
    Helsinki, Finland
    Document Language
    en
    Sustainable Development Goals (SDG)
    14.a
    Essential Ocean Variables (EOV)
    Surface salinity
    Subsurface salinity
    Surface temperature
    Subsurface temperature
    Maturity Level
    Mature
    Spatial Coverage
    Baltic Sea
    Citation
    HELCOM (2017) Guidelines for determination of salinity and temperature using CTD. Helsinki, Finland, HELCOM, 6pp. DOI: http://dx.doi.org/10.25607/OBP-1797
    URI
    https://repository.oceanbestpractices.org/handle/11329/2002
    http://dx.doi.org/10.25607/OBP-1797
    Collections
    • CAPARDUS Practices [212]
    • HELCOM Manuals and Guidelines [37]

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