How do we measure the density of sea water? Woods Hole Oceanographic Institute, 2001. Handbook of Chemistry and Physics 48th edition. "At 30 degrees Celsius, a change in salinity from 34‰ to 35‰ changes the density from 1.021 to 1.022." Representative average values are 1.026–1.028," "While density of pure water at 4 degrees Celsius is equal to 1, the density of seawater ranges over somewhat higher values, which vary with proximity to shores, rivers, etc., as well as with geographic location & depth. Van Nostrand's, Scientific Encyclopedia 7th edition. "Because of salinity and temperature variations, the density of seawater ranges from about 1.02 g/cm 3 to 1.03 g/cm 3." Its specific gravity is therefore 1.025.Įdward LaValley - 2002 Bibliographic Entry Although the density of seawater varies at different points in the ocean, a good estimate of its density at the ocean's surface is 1025 kilogram per cubic meter. As salinity of the water increasaes, density also increases. As temperature increases, density decreases. The density of seawater varies with temperature and salinity of the water. Where the density of water in SI units is 1000 kilogram per cubic meter. Density can also be expressed as specific gravity, which is the ratio of the density of a material to the density of water. The density of an object is the ratio of its mass to its volume. "The density of seawater at the surface of the ocean varies from 1,020 to 1,029 kilograms per cubic meter." Department of Geography, Okanagan University College., 11 June 2001. In this notation, the specific gravity of 1.025 is expressed as σ of 25." "For the reason as stated under salinity, it is customary to report the density os seawater in equivalent to "grams per litre excess over one kilogram,"designated by the symbol σ. "Ocean - Density and Pressure." Encyclopedia Britannica., USA, 1965. "Density of ocean water at the sea surface is about 1027 kg/m 3." University Corporation of Atmospheric Research (UCAR), 2000 The Regents of the University of Michigan. "Seawater is usually some 3.5 percent heavier than fresh water because it contains about 35 pounds of salts in each 1,000 pounds of water" "Density and Weight." Compton's Interactive Encyclopedia.
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