Question

what are the reasons of salinity of water increases in sea water

Answer 1

Answer:

There are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. The evaporation removes water - when water vapour rises into the atmosphere , it leaves the salt behind , so salinity of the water increases in sea water.

Answer 2

Answer:

The term "salinity" refers to the concentrations of salts in water or soils. Salinity can take three forms, classified by their causes: primary salinity (also called natural salinity); secondary salinity (also called dryland salinity), and tertiary salinity (also called irrigation salinity).