EAS212 Lecture 5: notes_lecture05
4 Apr 2016
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A typical surface density is 1026 kg/m3 (1022 to 1030 kg/m3 ) The density of sea water depends on temperature, salinity and pressure. Water molecules are fairly close together difficult to squeeze them closer. Water is thus termed incompressible (only small volume and density changes occur as the pressure changes) Exception: deep ocean pressure over 1000 times the atmospheric water density increases by about. T , add energy distance between molecules water expands (number of molecules is the same). In general, for both water and ice, density decreases as the temperature increases. Pure water - the density increases as the temperature increases from 0 to 4 c. The density decreases when water freezes to ice. Add salt: lower freezing point, inhibit clustering of water molecules, which , lower the temperature of maximum density. At 24. 7, temperature of max density and freezing point are the same. Above that, freezing point is reached before a density maximum occurs.
