The ocean is salty, although it is powered by rivers and freshwater strap. This seemingly paradoxical phenomenon has a complex explanation, which involves natural processes over millions of years.
According to an article published by BBC Mundo, the freshwater that reaches the ocean already contains dissolved salts and minerals. The rainwater, which contains carbon dioxide from the atmosphere, becomes a weak acid. When it falls on the rocks, this acid dissolves small particles of minerals and salts. These particles are transported by rivers and streams to the ocean.
In the fresh waters, the concentration of salts is constantly diluted by rain. Instead, the ocean is a cumulative system, where salts and minerals accumulate over time, notes Noi.md with reference to.
On average, the sea contains about 3.5% salt, which means that each liter of ocean water contains about 35 grams of salt. The salinity of the sea is not uniform all over the globe.
It is lower near the equator and at Poli, where there are several precipitation and melting. In areas of average latitudes, where evaporation is higher, salinity tends to increase.
