Cypremort Point Salinity

Does anyone know why USGS shows the Cypremort Point Salinity at 10 but NOAA shows it at 2?

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May have something to do with the units expressed. NOAA's units indicate a negative value on the scale, which wouldn't exist in a measurement of parts per thousand.

Quote:

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Originally Posted by Tracker123

May have something to do with the units expressed. NOAA's units indicate a negative value on the scale, which wouldn't exist in a measurement of parts per thousand.

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I thought the same, however, all of the literature that I've read states that they are the same.

I think it is because PSU is a measure of conductivity which is related to ppt of salinity but not proportionally...HTH...In other words PSU is useless and antiquated...ppt is much better IMO.