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Water Density
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Density
= mass per unit volume, governed by temperature & salinity [kg/m-3
or g/cm-3]
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Pure water
at 3.98°C = 1.0 g/cm-3;avg salinity water = 1.0278 g/cm-3
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In oceanography:
sT (sigma-T)
sT = 1000
x (1.0278 – 1)
sT = 27.8
(!! without unit !!)
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Density
increases with depth because denser water is “heavier”
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Water
mass = body of water with specific temperature/salinity combination
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Ice has
a lower density than liquid water! Ice cubes float on top of drink as sea
ice does on sea surface
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