Why is the water in the Arctic Ocean less salty than in other oceans?

This is due to the fact that large Siberian rivers flow into it and thus slightly desalinate the ocean. The ocean also receives water from melting glaciers and sediments. There is a gradual increase in ocean desalination; it has increased by one-fifth compared to 1990. Possibly due to increased melting of glaciers. In addition, slightly saline waters from the Pacific Ocean enter the ocean.