Sample date (YYYY-MM-DD)DateSample date DepthDepthSample depthm SalinitySalinitySea ice salinity is the salt content of sea ice, often on the Practical Salinity Scale of 1978.psu Gaseous HgGaseous MercuryThe concentration of mercury in the gaseous form, including elemental mercury and dimethylmercuryfM Total HgTotal MercuryThe concentration of all mercury species that can be oxidized by Bromine monochloride (BrCl)pM