Question

what is average salinity of Atlantic Ocean ​

Answer 1

3.3 to 3.7% is the  average salinity of Atlantic Ocean ​.

Answer 2

Answer:

On average, the Atlantic is the saltiest major ocean; surface water salinity in the open ocean ranges from 33 to 37 parts per thousand (3.3–3.7%) by mass and varies with latitude and season. Evaporation, precipitation, river inflow and sea ice melting influence surface salinity values.