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A sample of seawater from most locations with a chlorinity of 19.37 ppt will have a Knudsen salinity of 35.00 ppt, a PSS-78 practical salinity of about 35.0, and a TEOS-10 absolute salinity of about 35.2 g/kg. The electrical conductivity of this water at a temperature of 15 °C is 42.9 mS/cm. [6] [12]
TEOS-10 (Thermodynamic Equation of Seawater - 2010) is the international standard for the use and calculation of the thermodynamic properties of seawater, humid air and ice. It supersedes the former standard EOS-80 (Equation of State of Seawater 1980). [ 1 ]
The salinity in isolated bodies of water can be considerably greater still – about ten times higher in the case of the Dead Sea. Historically, several salinity scales were used to approximate the absolute salinity of seawater. A popular scale was the "Practical Salinity Scale" where salinity was measured in "practical salinity units (PSU)".
The ocean currents surrounding the Philippines: (1) Mindanao Current, (2) Mindanao Undercurrent (dotted to indicate that it is deeper than the other currents shown), (3) Mindanao Eddy, (4) North Equatorial Current, (5) Kuroshio current, (6) the beginnings and feeder currents of the Kuroshio (gradated to indicate that it strengthens to the North), (7) Indonesian Throughflow, and (8) North ...
Due to the baroclinic density field, the Alaska current is highly sheared vertically, and the cross-current density gradient is reflected by the offshore salinity gradient. The surface salinities are less than 30 PSU (Practical Salinity Unit) at the coastal areas, more than 31 PSU on the shelf, and more than 32.5 PSU in the central Gulf of Alaska.
Temperature and salinity combine to determine the potential density of seawater; contours of constant potential density are often shown in T-S diagrams. Each contour is known as an isopycnal, or a region of constant density. These isopycnals appear curved because of the nonlinearity of the equation of state of seawater.
Fig. 1 Global map of water stress and distribution of OFG system, thickness and minimum salinity values. Square symbols represent area where OFG thickness is unknown Offshore freshened groundwater (OFG) is water that contains a Total Dissolved Solid (TDS) concentration lower than sea water, and which is hosted in porous sediments and rocks ...
The "practical salinity unit" is effectively not motivated in the article since it completely lacks any reference to physical salinity. The statement "It is not the case that a salinity of 35 exactly equals 35 grams of salt per liter of solution." only says that PSU is not equal to grams per liter.