Salinity: Definition and Importance to Marine Life
https://www.thoughtco.com/salinity-definition-2291679
Salinity in seawater is measured in parts per thousand (ppt) or practical salinity units (psu). Normal seawater has an average of 35 parts of dissolved salt per thousand parts of water, or 35 ppt. That equates to 35 grams of dissolved salt per kilogram of seawater , or 35,000 parts per million (35,000 ppm), or 3.5% salinity, but it can range ...
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