When seawater freezes in polar regions most of the salt is left behind. How would this affect the density of the water that is left unfrozen?

When seawater freezes in polar regions, the salt is excluded from the ice and remains in the liquid water. This increases the salinity and, consequently, the density of the unfrozen seawater. As a result, the denser water can sink below the less dense water, contributing to ocean currents and influencing global climate patterns.