There are three basic processes that cause a change in oceanic salinity.One of these is the subtraction of water from the ocean by means of evaporation - conversion of liquid water to water vapor.

• 导致海洋的盐度变化的基本过程有三个，其中之一是通过蒸发的方式即把液态水转化为水蒸气来减少海洋中的水分。