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Average salinity from historical ship and buoy data
Average Salinity From Historical Ship and Buoy Data
[20-Oct-11] This map shows interpolated global ocean salinity at the surface based on all historical observations: red areas have high salinity (i.e., 36 Practical Salinity Scale, PSS, or higher) and blue areas have low salinity (i.e., 34 PSS or lower). Credit: World Ocean Atlas 2009.

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