Supplied Units:
Practical Salinity Units (PSU)
Description:
The surface seawater salinity as measured by the YSI instrument indicated; units are practical salinity units (psu). For the YSI ProDSS; salinity was calibrated with a purchased seawater standard from Xylem; Inc. at 50 mS/cm following manufacturer's protocols about every month that the instrument was in active use. Salinity calibration was reported to be steady and reliable for a few weeks. For the other YSI instruments: it was unknown what the calibration protocol was.