Distribution of salinity depends on the local conditions in partially – surrounded oceans. The distribution of salinity in the Mediterranean Sea is found to be very different. In its north – eastern part, the salinity is 39 per thousand grams, while in its south – eastern part, it is 41 per thousand grams. In the northern part of the Red Sea, the amount of salinity is 41 per thousand grams, and in the southern part, it is 36 per thousand grams.
In the Persian Gulf, the amount of salinity is 48 per thousand grams. High salinity is found here due to the factors like lack of rainfall, lesser availability of clean water, high temperature, more evaporation, etc. The amount of salinity in the Black Sea is about 18 per thousand grams, in the Baltic Sea it is about 15 per thousand, in the Gulf of Bothania it is about 8 per thousand and in the Gulf of Finland, it is only 2 per thousand. The main reasons for this is the extensive clean water supply by rivers, supply of melt water by glaciers, low temperature, low evaporation rate, etc.
