Question

“Though Caspian Sea is enclosed its salinity is just 14 to 17 parts per thousand. Why is it so?

Answer 1

1. The Caspian Sea is a freshwater lake in its northern portions due to the current inflow of freshwater and is most saline on the Iranian shore where the catchment basin contributes little flow.
2. Currently, the mean salinity of the Caspian sea is one-third that of Earth’s oceans.