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).
What is âparts per thousandâ? Much like percentage, parts per thousand (ppt) is a ratio often used to refer to the concentration of solutes in solutions, such as salts in water (i.e. salinity). âThe average salinity in ocean waterâ, you will read in most introduction to oceanography textbooks, âis 35 pptâ. But in reality, âhardcore scientistsâ do not use ppt as a unit for the measurement of salinity. A brief and salty history lesson Up until the 1980âs, scientists used to measure salinity in parts per thousand.