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  • Map showing different levels of ocean salinity.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 30 June 2010 Size: 780 KB Referencing Hub media

    Much of the open ocean has a salinity between 34 ppt and 36 ppt. Salinity is controlled by a balance between water removed by evaporation and freshwater added by rivers and rain.

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