Question

write any two factors that affect the salinity of oceans

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Answer 1

Salinity is the term used to define the total content of dissolved salts in sea water.It is calculated as the amount of salt (in gm) dissolved in 1,000 gm (1 kg) of seawater.It is usually expressed as parts per thousand or ppt.Salinity of 24.7 (24.7 o/oo) has been considered as the upper limit to demarcate ‘brackish water’.

Role of Ocean Salinity

Salinity determines compressibility, thermal expansion, temperature, density, absorption of insolation, evaporation and humidity.It also influences the composition and movement of the sea: water and the distribution of fish and other marine resources.

Factors Affecting Ocean Salinity

1) The salinity of water in the surface layer of oceans depend mainly on evaporation and precipitation.

2) Surface salinity is greatly influenced in coastal regions by the fresh water flow from rivers, and in polar regions by the processes of freezing and thawing of ice.

3) Wind, also influences salinity of an area by transferring water to other areas.

4) The ocean currents contribute to the salinity variations. Salinity, temperature and density of water are interrelated. Hence,any change in the temperature or density influences the salinity of water in an area.

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Answer 2

Answer:

• Factors affecting salinity of oceans: -

       1) Precipitation and evaporation of sea water.

      2) The coastal environment has a significant impact on surface     salinity.

     3) Wind, which moves water to different locations, also affects the salinity of a region.

    4) The fluctuations in salinity are influenced by ocean currents. Water density, temperature, and salinity  are connected.

Explanation:

• The total amount of dissolved salts in seawater is referred to as salinity. It is computed as the quantity of salt (in gm) dissolved in one kilogram's worth of saltwater, or 1,000 gm. Parts per thousand, or ppt, is the standard unit of measurement of salinity of water.

• Reasons for measurement of salinity of oceans important

         1. Compressibility, thermal expansion, temperature, density, absorption of insolation, evaporation, and humidity are all influenced by salinity.

        2. It also affects water and the distribution of fish and other marine resources. It also has an impact on the composition and movement of the sea.

• Factors affecting salinity of oceans: -

       1) Precipitation and evaporation play a major role in determining the salinity of water in the ocean's surface layer.

      2) The coastal environment has a significant impact on surface     salinity. The rivers and in the polar regions, ice's freezing and thawing processes affect salinity.

     3) Wind, which moves water to different locations, also affects the salinity of a region.

    4) The fluctuations in salinity are influenced by ocean currents. Water density, temperature, and salinity  are connected. Therefore, any change in temperature or density affects the water salinity.