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Surface water salinity ranges from 32 to 37 parts per 1000
Deep ocean currents typically have greater salinity compared to surface currents. This is primarily due to factors such as evaporation in warmer regions and the formation of sea ice, which increases the concentration of salts in the water. Additionally, deep currents are often sourced from colder, saltier water masses that have sunk and are less affected by precipitation and runoff that can dilute surface salinity.
Surface water salinity ranges from 32 to 37 parts per 1000
If the salinity of surface ocean water is high in a particular place, it suggests that there is high evaporation rates in that area. As water evaporates, it leaves behind salt, increasing the salinity of the remaining water.
The main reasons for higher salt content in surface ocean water are evaporation and formation of sea ice. As water evaporates, salt is left behind, causing an increase in salinity. In regions where sea ice forms, the salt is expelled, further increasing the salinity of the remaining water.
Dissolving salts in water increases the density slightly. Ocean waters have an average density about 2.5% greater than fresh water. The Dead Sea has a much higher density, somewhere roughly near 20% greater than fresh water due to its 30% salinity level.
Ocean water off the Antarctic coast is between 32F degrees and about 27F degrees, based on the salinity of the water. It's always warmer in the ocean water than it is above the surface of the water.
Winds and ocean currents move water parallel to Earth's surface. Winds can create surface currents through friction with the ocean's surface, while ocean currents are driven by a combination of factors such as wind, temperature, salinity, and the Earth's rotation.
salinity
What causes low salinity in the oceans at high latitudes?In subtropical latitudes, high surface evaporation creates high salinity near the sea surface. In subpolar latitudes, high precipitation creates low salinity near the sea surface. As these waters flow into the ocean interior, they create layers of high and low salinity.
Surface water slainity is higher in tropical regions.
You could increase the salinity of the ocean by adding salt or removing water (ie: by evaporation).