Question

why differencecs are there in the salinity of ​

Answer 1

Salinity of water: The content of the salt in ocean water is called salinity of water. There are differences in the salinity of ocean water. In coastal regions by the fresh water flow from rivers and in polar regions by the process of freezing and thawing of ice.

Answer 2

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• Salinity is defined as total amount of dissolved salts in sea water.

• It is calculated as amount of salt (in grams) dissolved in 1000 gms of sea water and usually expressed in "ppt" (parts per thousand).

• Salinity differs from one water source to other.

• For example:-salinity of fresh water(ponds,rivers etc..) is 0-5 ppt, brakish water (estuaries, Swamps etc..)

• The main reason for these differences can attributed to :-

1. Rate of chemical erosion of bed rock.
2. Rate of evaporation.
3. Presence of biological elements (plants and animals).

• For example, if rate of evaporation is high, the amount of salt gets accumulated is high leading to high salinity.

• Example:- dead sea has salinity of 238%.

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