Salinity variations in the open ocean normally range from 33 percent to?

Salinity variations in the open ocean typically range from about 33 parts per thousand (ppt) to 37 ppt. These variations can be influenced by factors such as evaporation, precipitation, river runoff, and ocean currents. In some regions, such as coastal areas or estuaries, salinity can fluctuate more dramatically due to localized conditions. Overall, the average salinity of seawater is approximately 35 ppt.