WATER SALINITY


Salinity is the amount of salt in the water. There are two specific ingredients in salt which is in the oceans. They are: halides and chloride. How much salt which is in the ocean also depends on the density currents too. If ice melts close to the North and South Poles, that is a way in making the salinity decrease. This only happens close to the continents and only rivers which produce freshwater traveling to oceans. When salinity increases, evaporation and freezing have to be occurring in that area. The Tropical regions have a lot of evaporation forming, so of course the salinity will be higher there. The salinity also goes higher if the water is very cold and the saltwater starts freezing. The waters which are the coldest, saltiest and densest are at the North and South Poles. When cold dense water overlaps warm water that is called upwelling. Upwelling makes the nutrients in the water come to the top of the ocean. When the wind reaches to the surface of the ocean, that can also make upwelling to occur too.