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).
Absolute (or ideal) salinity is the mass fraction of salts in seawater [17]. In practical terms, salinity is expressed as PSU (practical salinity units) which are based on water temperature and conductivity measurements [17].Salinity used to be expressed in parts per thousand (ppt). For oceanic seawater, ppt and PSU are very close.n practical terms, salinity is expressed as PSU (practical salinity units) which are based on water temperature and conductivity measurements [17]. Salinity used to be expressed in parts per thousand (ppt).