Question

why there is difference in the salinity of oceans?​

Answer 1

Explanation:

anytime fresh water enters the oceans, it lowers the salt levels. evaporation removes it more in arid places, but there is less amount of rain to make up for water loss and therefore some places in oceans have more salinity than other places.

Answer 2

Answer:

Evaporation of ocean water and formation of sea ice both increase the salinity of the ocean. However these "salinity raising" factors are continually counterbalanced by processes that decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.