re: Antarctic sea ice hit 35-year record high Saturday, Old but interesting artlicle

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Pectus

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Are there any graphs that show average salinity over the past hundred years or so? I've found a dissertation about salinity being used to determine Earth's age (it says that while there may be local salinity changes from ocean to ocean, the average hasn't changed for at least 50 years), but nothing that shows a trend for current times.