GEOLOGY

Detailed explanation-1: -The total quantity of dissolved salts in sea water is expressed as salinity, which can be calculated from conductivity and temperature readings. Salinity was historically expressed quantitatively as grams of dissolved salts per kilogram of water (expressed as ‰) or, more commonly, in parts per thousand (PPT).

Detailed explanation-2: -The term “salinity” refers to the concentrations of salts in water or soils. Salinity can take three forms, classified by their causes: primary salinity (also called natural salinity); secondary salinity (also called dryland salinity), and tertiary salinity (also called irrigation salinity).

Detailed explanation-3: -The concentration of salt in seawater (its salinity) is about 35 parts per thousand; in other words, about 3.5% of the weight of seawater comes from the dissolved salts. In a cubic mile of seawater, the weight of the salt (as sodium chloride) would be about 120 million tons.

Detailed explanation-4: -As a basic definition, salinity is the total concentration of all dissolved salts in water 4. These electrolytes form ionic particles as they dissolve, each with a positive and negative charge.

Detailed explanation-5: -Salinity-Salinity is the amount of salt in grams present in 1000 grams of water. The average salinity of the oceans is 35 parts per thousand.