Are the oceans losing salinaty

Answer 1

No, in fact, they are continuously gaining salinity. Salinity is the concentration of salt in water.
The salt in oceans come from land.
Picture this: Ir rains, then rainwater goes to lakes, rivers, streams, then finally goes into sea then into oceans.
As water travels, it dissolves mineral, especially salts in soil.
The salt travels dissolved into the sea.
But, salt does not evaporate with seawater.
Only pure water evaporates.
AS this goes on, salt remains at seas and continuously gains by time.