why arabian sea has high density
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The global ocean is filled with water whose average density is 1.03 g/cm3. The density is not uniform: it varies in the vertical, with denser water always below lighter water. The temperature, the quantity of dissolved salts (also known as salinity), and the pressure to which a parcel of seawater is exposed determine its density. 75% of the water in the oceans has temperatures ranging between 0° and 6°C; the average temperature is 3.5°C. Water at depth and near the poles is cold. It gets warmer towards the surface and towards the equator (Fig. 12). Surface temperature in the Bay of Bengal is usually between 22°C and 31ºC. It is cooler by 1-2ºC in the Arabian Sea. This difference has major implications for the atmosphere above the two basins.
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