Oceans make up 70% of the Earth's surface, but what reason salinity?
Ocean water contains many mineral salts, such as sodium,
chloride, sulfate, magnesium, potassium, bicarbonate, bromide. These
salts intervention to the ocean through rivers flowing into it, and that
may be picked up salts from the rocks and dust that have passed through
her journey.
In turn, these salts accumulate in the oceans, where the
water can not leave except by evaporation process that takes water with
it without salts, which reduces the amount of water compared to the
amount of the fixed salts, and this explains why the salinity of the
oceans.
The same can happen to flat water and a small closed, which
is a landlocked, such as the Great Salt Lake in Utah of America, if the
water evaporate quickly in the desert climate, what caused the low lake
level 20 feet since 1849, and is floating on the surface of the lake of
Interests a favorite among visitors because of its high density
provided by salinity.
Ocean salinity ratios vary greatly from one place to
another, it is the Mediterranean, for example, more salty than the ocean
off the coast of the continents where large rivers with fresh water,
such as the Amazon, where the Atlantic Ocean salinity near the mouth of
the Amazon River relatively less take place, Due to the mixing of fresh
river water with salty ocean water.
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