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Seawater is water from a sea or ocean with a salinity of about 3.5% and a density of 1.025 kg/L at the surface. Learn how seawater density varies with temperature, salinity and pressure, and what substances are dissolved in seawater.
Find the density of seawater for different temperatures and salinities, as well as other properties like saturation pressure, specific heat, electrical conductivity and viscosity. The web page also shows graphs of density and conductivity vs. temperature and salinity.
13 wrz 2024 · Seawater - Density, Pressure, Salinity: The density of a material is given in units of mass per unit volume and expressed in kilograms per cubic metre in the SI system of units. In oceanography the density of seawater has been expressed historically in grams per cubic centimetre.
31 lip 2024 · The mixture of water and salt hereafter referred to as salt water has a different density than pure water. The basic parameter that tells us about the amount of salt in salt water is salinity, S, given as: S = m₁ / (m₁ + m₀), where m₀ is the mass of pure water and m₁ is the mass of salt.
The USGS salinity scale defines three levels of saline water. The salt concentration in slightly saline water is 1,000 to 3,000 ppm (0.1–0.3%); in moderately saline water is 3,000 to 10,000 ppm (0.3–1%); and in highly saline water is 10,000 to 35,000 ppm (1–3.5%).
13 wrz 2024 · Pure water freezes at 0 °C and boils at 100 °C (212 °F) under normal pressure conditions. When salt is added, the freezing point is lowered and the boiling point is raised. The addition of salt also lowers the temperature of maximum density below that of pure water (4 °C [39.2 °F]).
Learn how oceanographers measure and calculate the density of seawater using temperature, salinity and pressure as state variables. Explore the international standards for seawater properties and their applications in ocean science.
