Dear as I said depth is characteristic of Salinity and not a determinant factor. Depth doesn't affect the increase or decrease in ocean salinity but it is rather a characteristic of saline water. Salinity might change with depth but what causes salinity to increase or decrease is climate. Moreover climate is a major determinant of salinity. This is the main reason why salinity in some areas is high and in others low. Name any region which determines salinity through depth of ocean water.You will find examples of Salinity in conformity with climate.

Anyways you may consider what you want to consider. You may keep your opinion i would keep mine.

Regards
Stay Blessed

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