Determine how the temperature and salinity of waters change from the equator to the poles.

Determine how the temperature and salinity of waters change from the equator to the poles. What are the highest and lowest latitudes? Determine if there is a relationship between temperature and salinity of surface waters. Find parts of the World Ocean where this relationship is not traced.

Salinity decreases. In tropical; latitudes the highest salinity.
In tropical latitudes, the salinity of the water is greatest, since there is little precipitation and high evaporation. When the water evaporates, the salt remains in the sea. In equatorial latitudes, salinity is lower – there is abundant rainfall. Salinity decreases in polar regions. There is little precipitation, but also little evaporation. Salinity also decreases due to ice melting.
At the equator, salinity is less than average (about 31 ppm): in these parts of the oceans, heavy rains are obtained throughout the year, and evaporation is reduced due to high air humidity and the usual cloud cover in these latitudes.