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ProDigit t1_is4d16m wrote

Reply to comment by Chlorophilia in Does the salinity of ocean water increase as depth increases? by rhinotomus

Add to that, that most of the rain water on oceans (being fresh desalinated) is added to the top layers.

While the waters do mix over time with the more salty, deeper down waters, the addition of fresh water nearly daily to the top layers adds to the effect of the 'top fresh, bottom salty' water theory.

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