Welcome To Whitehall Township Whitehall Township is located in the center of the Lehigh Valley. The Township is one hour north of Philadelphia and an hour and half from New York City.
SALINITY OVERVIEW Salinity is the concentration of dissolved salts in water, usually expressed in parts per thousand (ppt). Objects float higher in salt water than fresh water because salt water is denser (heavier per unit of volume).
Salinity. The open ocean typically has surface salinities between 32 and 37 ppt. The salinity may be lower near where large rivers drain into the ocean. The salinity of 75% of the water in the ocean is between 34 and 35 ppt. The surface ocean salinity is high in the subtropics because of all the evaporation.he salinity of 75% of the water in the ocean is between 34 and 35 ppt. The surface ocean salinity is high in the subtropics because of all the evaporation.