Question

Indian Ocean basin surface water salinity varies between:

• A. 32 and 37 parts per thousand
• B. 22 and 27 parts per thousand
• C. 12 and 17 parts per thousand
• D. 2 and 7 parts per thousand

Hint:

Ocean surface salinity varies due to evaporation, rainfall, and river inflow—32 to 37 ppt is typical for the Indian Ocean.

Answer 1

The Correct Option is A

Surface water salinity in the Indian Ocean generally ranges from 32 to 37 parts per thousand (ppt). The variation is due to:
- High evaporation in the northern Indian Ocean,
- Low freshwater inflow compared to the Atlantic,
- Regional climate and current influences.