Question

what are the difference salinity of oceans

Answer 1

The freshwater added at the surface dilutes the seawater, reduces the salinity and so makes the seawater less dense. Seawater can also be less saline near land, where rivers add freshwater. The ocean around Antarctica has a low salinity of just below 34ppt, and around the Arctic it is down to 30pptin places.Jun 22, 2010

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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