Wouldn't the water just continously evaporate only to, with high probability, precipitate back to the "global" ocena system or its tributaries? You could make

Wouldn't the water just continously evaporate only to, with high probability, precipitate back to the "global" ocena system or its tributaries? You could make the see less salty though, over a sufficiently long time and get a WHOLE LOT of rock salt.