Water drops on the hydrophobic surface of grass. In chemistry, hydrophobicity is the physical property of a molecule (known as a hydrophobe) that is seemingly repelled from a mass of water. (Strictly speaking, there is no repulsive force involved; it is an absence of attraction.) In contrast, hydrophiles are attracted to water.
Ocean salinity is generally defined as the salt concentration (e.g., Sodium and Chlorure) in sea water. It is measured in unit of PSU (Practical Salinity Unit), which is a unit based on the properties of sea water conductivity. It is equivalent to per thousand or (o / 00) or to g/kg.
Conductivity is the measure of a materialâs ability to conduct an electric current. In ocean sciences, the electrical conductivity of seawater is used as an indication of salinity. The saltier the water, the higher the conductivity will be.Seawater salinity can be calculated from measured values of conductivity and temperature. Salinity refers to the amount of salts dissolved in water, expressed as parts per thousand, or ppt.This corresponds to the amount of salt in grams dissolved in 1000 grams of water. However, salinity is difficult to measure directly and is generally calculated from conductivity and temperature measurements.he saltier the water, the higher the conductivity will be. Seawater salinity can be calculated from measured values of conductivity and temperature. Salinity refers to the amount of salts dissolved in water, expressed as parts per thousand, or ppt.