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| Annual mean surface salinity data from NOAA National Oceanographic Data Center's World Ocean Atlas | Global distribution of salinity data (in psu) demonstrates the sampling sparsity prior to launch of Aquarius (Data from the World Ocean Atlas) | Global distribution of salinity anomaly samples for winter months: December, January, February (Data from the World Ocean Atlas) |
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| Global distribution of salinity anomaly samples for spring months: March, April, May (Data from the World Ocean Atlas) | Global distribution of salinity anomaly samples for summer months: June, July, August (Data from the World Ocean Atlas) | Global distribution of salinity anomaly samples for autumn months: September, October, November (Data from the World Ocean Atlas) |
Glossary Words
anomaly: Deviation from the normal, mean, or average.
conductivity: A measure of the ability of a material to conduct or transmit an electric charge.
practical salinity unit (psu): Used to describe the concentration of dissolved salts in water, the UNESCO Practical Salinity Scale of 1978 (PSS78) defines salinity in terms of a conductivity ratio, so it is dimensionless. Salinity was formerly expressed in terms of parts per thousand (ppt) or by weight (parts per thousand or 0/00). That is, a salinity of 35 ppt meant 35 pounds of salt per 1,000 pounds.
salinity: A measure of the quantity of dissolved solids in ocean water. In general, salinity reflects the total amount of dissolved solids in ocean water in parts per thousand by weight after all carbonate has been converted to oxide, the bromide and iodide to chloride, and all the organic matter oxidized. Salinity is now measured as pratical salinity units (psu).
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